WO2020059116A1

WO2020059116A1 - Poor physical condition detection device and poor physical condition detection method

Info

Publication number: WO2020059116A1
Application number: PCT/JP2018/035052
Authority: WO
Inventors: 奈津季田原
Original assignee: 三菱電機株式会社
Priority date: 2018-09-21
Filing date: 2018-09-21
Publication date: 2020-03-26

Abstract

A poor physical condition detection device (100) comprises: an image acquisition unit (101) for acquiring an image of the eyes of an occupant of a vehicle (1) during a predetermined first period after the eyes are irradiated with a flashing light; an exposure parameter acquisition unit (102) for acquiring an exposure parameter used when the image was captured; a pupil diameter detection unit (103) for detecting the pupil diameters of the eyes on the basis of the image; a reference pupil diameter determination unit (104) for determining a reference pupil diameter on the basis of the exposure parameter acquired by the exposure parameter acquisition unit (102); and a poor physical condition detection unit (105) for detecting a poor physical condition of the occupant on the basis of the pupil diameters detected by the pupil diameter detection unit (103) and the reference pupil diameter determined by the reference pupil diameter determination unit (104).

Description

Physical condition detection device and physical condition detection method

The present invention relates to a poor physical condition detecting device and a poor physical condition detecting method.

技術 Technologies for monitoring the physical condition of occupants of vehicles are being studied.

For example, in Patent Literature 1, an iris diameter and a pupil diameter are calculated based on a light source that irradiates the anterior segment with flash light, an imaging device that captures an anterior segment, and an image of the anterior segment captured by the imaging device. An iris / pupil diameter calculating unit; and a stress intensity calculating unit that calculates a stress intensity from a ratio of the pupil diameter to the iris diameter, wherein the stress intensity calculating unit calculates an initial value calculated from the iris diameter and the pupil diameter before the pupil-light reaction. By adding, multiplying, or adding and multiplying the relative pupil diameter ratio, the relative pupil minimum diameter ratio of the maximum pupil after pupil-to-light reaction, and the plurality of relative pupil diameter ratios after the lapse of the set time, the stress intensity Is disclosed.

JP 2008-212179 A

The light reflection of the pupil diameter occurs not only before and after flash light irradiation but also due to, for example, a change in environmental illuminance. In particular, in a traveling vehicle, the environmental illuminance at the eyes of the occupant of the vehicle changes depending on various factors such as the position or orientation of the traveling vehicle, the surroundings of the traveling vehicle, or the date and time when the vehicle travels.
However, the conventional technology does not consider changes in the pupil diameter due to changes in environmental illuminance, and thus cannot accurately obtain the amount of change in the pupil diameter due to flash light irradiation. Could not be determined.

An object of the present invention is to solve the above-mentioned problems, and to provide a poor physical condition detecting device capable of accurately determining the physical condition of an occupant of a vehicle based on a change in pupil diameter due to irradiation of flash light. It is an issue.

A poor physical condition detection device according to the present invention includes an image acquisition unit configured to acquire an image of the eye of a vehicle occupant during a predetermined first period after the eye is irradiated with the flash light; An exposure parameter acquisition unit that acquires an exposure parameter used when the image is captured, a pupil diameter detection unit that detects a pupil diameter of the eye based on the image, and an exposure parameter acquisition unit that acquires the exposure parameter acquired by the exposure parameter acquisition unit. A pupil diameter determining unit that determines a reference pupil diameter based on the pupil diameter, a pupil diameter detected by the pupil diameter detecting unit, and a poor physical condition that detects a poor occupant condition based on the reference pupil diameter determined by the reference pupil diameter determining unit. And a detection unit.

According to the present invention, it is possible to accurately determine the physical condition of an occupant of a vehicle based on a change in pupil diameter due to flash light irradiation.

FIG. 1 is a block diagram illustrating an example of a main part of the poor physical condition detection device according to the first embodiment. 2A and 2B are diagrams illustrating an example of a hardware configuration of the poor physical condition detection device according to Embodiment 1. FIG. FIG. 3 is a diagram illustrating an example of exposure pupil diameter information held by a reference pupil diameter determination unit in the poor physical condition detection device according to the first embodiment. FIG. 4 is a diagram illustrating an example of a temporal change of a pupil diameter when a flash light is applied to a healthy human eye when there is no change in environmental illuminance. FIG. 5 is a diagram illustrating an example of the poor physical condition of the occupant detected by the poor physical condition detection unit in the poor physical condition detection device according to the first embodiment. FIG. 6 is a flowchart illustrating an example of a process performed by the poor physical condition detection device according to the first embodiment. FIG. 7 is a flowchart illustrating an example of the details of the process of step ST608 shown in FIG. FIG. 8 is a block diagram illustrating an example of a main part of the poor physical condition detection device according to the second embodiment. FIG. 9 is a flowchart illustrating an example of a process performed by the poor physical condition detection device according to the second embodiment. FIG. 10 is a block diagram illustrating an example of a main part of the poor physical condition detection device according to Embodiment 3. FIG. 11 is a flowchart illustrating an example of a process performed by the poor physical condition detection device according to the third embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment 1 FIG.
The physical condition detection device 100 according to Embodiment 1 will be described with reference to FIG.
The poor physical condition detection device 100 according to Embodiment 1 is applied to, for example, the vehicle 1.
FIG. 1 is a block diagram illustrating an example of a main part of poor physical condition detection device 100 according to Embodiment 1.
The vehicle 1 includes, for example, a poor physical condition detection device 100, an imaging device 11, a flash light source 12, and an output device 13.

The physical condition detection device 100 according to Embodiment 1 is mounted on, for example, the vehicle 1. The poor physical condition detection device 100 generates physical condition information and outputs the generated physical condition information to the output device 13 or the like. Details of the poor physical condition detection device 100 will be described later.

The output device 13 is mounted on, for example, the vehicle 1. The output device 13 is, for example, an output device such as a display output device or an audio output device. The output device 13 outputs the physical condition information acquired from the poor physical condition detection device 100 as an image, a sound, or the like.

The imaging device 11 is installed in the vehicle 1. The imaging device 11 images the eyes of the occupant of the vehicle 1. The imaging device 11 outputs data indicating the captured image of the eye (hereinafter, simply referred to as “image” including “data indicating an image”) to the poor-health detecting device 100.
The imaging device 11 is, for example, a digital camera capable of capturing a still image.

The imaging device 11 captures an eye of the occupant of the vehicle 1 by receiving a trigger signal from the poor physical condition detection device 100, for example.

The imaging device 11 includes, for example, an image sensor using a CCD (Charge-Coupled Device), a CMOS (Complementary MOS), and a lens that condenses external light on the image sensor. The imaging device 11 can change exposure conditions such as an exposure time of an image sensor or an aperture value of a lens when capturing an image.

For example, the imaging device 11 measures the brightness in the eyes of the occupant of the vehicle 1 output from an illuminance sensor (not shown) such as an AE (Automatic Exposure) sensor, a photometric sensor, or a luminance sensor provided in the imaging device 11. The exposure condition is changed based on the indicated information.

The imaging device 11 outputs, for example, an exposure parameter determined based on the exposure condition to the poor physical condition detection device 100. More specifically, for example, the exposure parameter is included in the header information of the image of the eye taken by the imaging device 11 according to a predetermined format such as Exif (Exchangeable image \ file \ format), and is included together with the image of the eye. Is output.

For example, the exposure parameter is determined based on the exposure time of the image sensor when the aperture value of the lens in the imaging device 11 is unchanged. In addition, for example, when the exposure time of the image sensor in the imaging device 11 does not change, the determination is made based on, for example, the aperture value of the lens. Further, for example, when the aperture value of the lens and the exposure time of the image sensor are variable, the determination is made based on the aperture value of the lens and the exposure time of the image sensor. The exposure parameter may be any parameter as long as the exposure condition can be identified. For example, the exposure parameter may be a number predetermined for each exposure condition.
In the first embodiment, as an example, a description will be given assuming that the aperture value of the lens in the imaging device 11 is invariable, and the exposure parameter is a value indicated by the reciprocal of the exposure time (second) of the image sensor.

The flash light source 12 is installed in the vehicle 1. The flash light source 12 is a lighting device that turns on a light-emitting body such as an LED (light emitting diode), a miniature bulb, or a halogen light. The flash light source 12 emits flash light to the eyes of the occupant of the vehicle 1. The flash light is a flash light that is generated when the light emitter of the flash light source 12 is turned on for a short period of time, for example, several milliseconds, and then turned off. The illuminant of the flash light source 12 is preferably capable of irradiating the eye portion of the occupant of the vehicle 1 with an amount of light capable of directly irradiating the flash light.
The timing of flash light irradiation by the flash light source 12 is controlled, for example, by a control signal output from the poor physical condition detection device 100.

(4) The flash light source 12 continuously emits a flash light in a period in which the vehicle 1 runs, for example, according to a control signal output from the poor physical condition detection device 100. Specifically, the flash light source 12 is controlled by the control signal output from the poor physical condition detection device 100, for example, in a period in which the vehicle 1 travels, for example, after a predetermined period elapses after irradiating the flash light, The flash light source 12 is irradiated with flash light. The predetermined period here is, for example, 10 minutes. Here, the predetermined period is not limited to the above-described period, and may be longer or shorter than 10 minutes, and may be determined based on continuous running time, weather, date and time, or running distance. May be.

Hereinafter, the poor physical condition detection device 100 will be described.
The poor physical condition detection device 100 includes an image obtaining unit 101, an exposure parameter obtaining unit 102, a pupil diameter detecting unit 103, a reference pupil diameter determining unit 104, and a poor physical condition detecting unit 105.

The image acquiring unit 101 captures an image (hereinafter, referred to as “first period”) of the eye of the occupant of the vehicle 1 during a predetermined first period (hereinafter, referred to as a “first period”) after the eye is irradiated with the flash light. 1st period image "). More specifically, for example, by transmitting a trigger signal to the imaging device 11, the image acquisition unit 101 causes the imaging device 11 to photograph the occupant's eye, and the first period image captured by the imaging device 11 is displayed. Obtained from the imaging device 11.
The image acquisition unit 101 transmits a control signal to the flash light source 12 to irradiate the occupant's eye with the flash light.
The first period is, for example, 2 seconds. The first period is not limited to two seconds. The first period is, for example, a period including a time point at which the size of the pupil diameter becomes minimum in the light reflection of the pupil diameter generated when the flash part is irradiated to the eyes of the occupant of the vehicle 1, 2 It may be longer or shorter than seconds.

The image acquiring unit 101 acquires, for example, a plurality of first period images in the first period. More specifically, for example, the image acquisition unit 101 acquires a plurality of first period images over a first period at a predetermined time interval after flash light irradiation. The time interval is, for example, a 0.2 second interval. The time interval is not limited to a 0.2 second interval. The time interval may be, for example, an interval longer or shorter than 0.2 seconds, or may be determined based on the length of the first period.

The image acquisition unit 101 controls the imaging device 11 to fix the exposure condition in the first period to the exposure condition before the flash light is irradiated.
By fixing the exposure condition of the imaging device 11 in the first period to the exposure condition before the flash light is irradiated, the exposure condition in the image in the first period is influenced by the irradiated flash light and the first period. To be unaffected by changes in ambient illuminance.

The exposure parameter acquisition unit 102 acquires the exposure parameters used when the first period image is captured. More specifically, for example, the exposure parameter acquisition unit 102 acquires the exposure parameter included in the header information of the first period image acquired by the image acquisition unit 101.

The pupil diameter detection unit 103 detects the pupil diameter of the eye of the occupant of the vehicle 1 based on the first period image acquired by the image acquisition unit 101.
More specifically, for example, first, the pupil diameter detection unit 103 performs the first period image by using a well-known method that appropriately combines well-known image analysis techniques such as an edge detection method, a model fitting method, and a pattern matching method. The position or shape of the pupil of the occupant is detected.
Next, the pupil diameter detection unit 103 calculates, for example, information such as the position or shape of the pupil of the occupant detected in the first period image, the distance from the imaging device 11 to the occupant's eye of the vehicle 1 captured by the imaging device 11. (Hereinafter, referred to as “distance information”), information indicating the angle of view of the imaging device 11 (hereinafter, referred to as “angle of view information”), and the like. Calculate the actual pupil diameter of the occupant.
The distance information is acquired from, for example, a distance measuring sensor (not shown) such as an AF (Auto Focus) sensor provided in the imaging device 11. The method for acquiring the distance information is not limited to the above-described method. For example, the imaging device 11 includes the distance information in the header information of the first period image, and the distance information is acquired via the first period image. Is also good.
As the angle of view information, for example, the imaging device 11 includes the angle of view information in the header information of the first period image, and the angle of view information is acquired via the first period image.

The reference pupil diameter determination unit 104 determines a reference pupil diameter based on the exposure parameters acquired by the exposure parameter acquisition unit 102.
Details of the reference pupil diameter determining unit 104 will be described later.

The poor physical condition detection unit 105 detects a poor physical condition of the occupant based on the pupil diameter detected by the pupil diameter detection unit 103 and the reference pupil diameter determined by the reference pupil diameter determination unit 104.
The poor physical condition detection unit 105 generates, for example, physical condition information indicating the detected physical condition of the occupant, and outputs the generated physical condition information to the output device 13 or the like. By outputting the physical condition information to, for example, the output device 13, the occupant can know, for example, his or her own physical condition.
Details of the poor physical condition detection unit 105 will be described later.

With reference to FIGS. 2A and 2B, a hardware configuration of a main part of physical condition detection device 100 according to Embodiment 1 will be described.
2A and 2B are diagrams illustrating an example of a hardware configuration of a main part of the physical condition detection device 100 according to Embodiment 1. FIG.

As shown in FIG. 2A, the poor physical condition detecting apparatus 100 is configured by a computer, and the computer includes a processor 201 and a memory 202. The memory 202 stores programs for causing the computer to function as the image acquisition unit 101, the exposure parameter acquisition unit 102, the pupil diameter detection unit 103, the reference pupil diameter determination unit 104, and the poor physical condition detection unit 105. By causing the processor 201 to read and execute the program stored in the memory 202, the image acquisition unit 101, the exposure parameter acquisition unit 102, the pupil diameter detection unit 103, the reference pupil diameter determination unit 104, and the poor physical condition detection unit 105 Is achieved.

{Circle around (2)} As shown in FIG. 2B, the poor physical condition detecting apparatus 100 may be constituted by a processing circuit 203. In this case, the functions of the image acquisition unit 101, the exposure parameter acquisition unit 102, the pupil diameter detection unit 103, the reference pupil diameter determination unit 104, and the poor physical condition detection unit 105 may be realized by the processing circuit 203.

The physical condition detection device 100 may be configured by a processor 201, a memory 202, and a processing circuit 203 (not shown). In this case, some of the functions of the image acquisition unit 101, the exposure parameter acquisition unit 102, the pupil diameter detection unit 103, the reference pupil diameter determination unit 104, and the poor physical condition detection unit 105 are implemented by the processor 201 and the memory 202. Then, the remaining functions may be realized by the processing circuit 203.

The processor 201 uses, for example, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), a microprocessor, a microcontroller, or a DSP (Digital Signal Processor).

The memory 202 uses, for example, a semiconductor memory or a magnetic disk. More specifically, the memory 202 includes a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Programmable Read Memory Only), and an EEPROM (Electrical Memory). State @ Drive) or HDD (Hard @ Disk @ Drive) or the like.

The processing circuit 203 includes, for example, an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field-Programmable Gate System Array), and an SoC (Sig-Lag-Sig-Lag-Site-Leg-Site-Ligital-Array-Sig-System-Sig-System-Sig-Leg-Sig-System-Sig-Leg-Sig-System-Sig-System-Sig-Leg-Sig-System). Is used.

With reference to FIG. 3, a process in which reference pupil diameter determination section 104 determines a reference pupil diameter will be described.
FIG. 3 is a diagram showing an example of exposure pupil diameter information held by the reference pupil diameter determination unit 104 in the poor physical condition detection apparatus 100 according to Embodiment 1.

The exposure pupil diameter information includes a plurality of reference exposure parameters and a reference pupil diameter associated with each of the plurality of reference exposure parameters. More specifically, for example, the exposure pupil diameter information is so-called matrix data having a plurality of reference exposure parameters and a reference pupil diameter associated with each of the plurality of reference exposure parameters.
The reference exposure parameter shown in FIG. 3 is, as an example, a value that is expressed by the reciprocal of the exposure time (second) of the image sensor assuming that the aperture value of the lens in the imaging device 11 is not changed.

The exposure pupil diameter information is held in advance, for example, by the reference pupil diameter determination unit 104.
The reference pupil diameter determining unit 104 may read out the exposure pupil diameter information from, for example, a storage device (not shown in FIG. 1) in which the exposure pupil diameter information is stored.

In FIG. 3, the left column describes the exposure parameters for reference. In FIG. 3, the right column is the reference pupil diameter associated with the reference exposure parameter described in the left column.
As described above, the reference pupil diameter determination unit 104 determines the reference pupil diameter based on the exposure parameters acquired by the exposure parameter acquisition unit 102.
Specifically, for example, when the reference pupil diameter determining unit 104 detects the poor physical condition of the occupant based on the exposure pupil diameter information and the exposure parameters acquired by the exposure parameter acquiring unit 102, The reference pupil diameter used for the determination is determined.
More specifically, for example, the reference pupil diameter determining unit 104 first compares the exposure parameter with the reference exposure parameter. Next, the reference pupil diameter determination unit 104 selects a reference pupil diameter associated with the reference exposure parameter equal to the exposure parameter, and based on the selected reference pupil diameter, the poor physical condition detection unit 105 The reference pupil diameter used when detecting the occupant's poor physical condition is determined.

For example, when the exposure parameter acquired by the exposure parameter acquisition unit 102 is 400, the reference pupil diameter determination unit 104 refers to the exposure pupil diameter information shown in FIG. "Millimeter" is referred to as "mm").

Further, for example, when the exposure parameter acquired by the exposure parameter acquiring unit 102 is 200, the exposure pupil diameter information shown in FIG. There are two. When there are a plurality of reference exposure parameters equal to the exposure parameters acquired by the exposure parameter acquisition unit 102 in this way, for example, the reference pupil diameter determining unit 104 determines the reference corresponding to each of the plurality of reference exposure parameters equal to the exposure parameters. The average value of the pupil diameters is determined, and the average value is determined as the reference pupil diameter used when the poor physical condition detection unit 105 detects the poor physical condition of the occupant. When there are a plurality of reference exposure parameters equal to the exposure parameters acquired by the exposure parameter acquisition unit 102, the reference pupil diameter is not limited to the above method. For example, the reference pupil diameter determination unit 104 uses the well-known statistical processing technology to determine the reference pupil diameter corresponding to each of the plurality of reference exposure parameters equal to the exposure parameter, and the poor physical condition detection unit 105 detects the poor physical condition of the occupant. The reference pupil diameter used at that time may be determined.

Further, for example, when the exposure parameter acquired by the exposure parameter acquiring unit 102 is 150, the exposure pupil diameter information shown in FIG. not exist. When there is no reference exposure parameter equal to the exposure parameter acquired by the exposure parameter acquisition unit 102 in this way, for example, the reference pupil diameter determination unit 104 determines the reference exposure parameter that is the value closest to the exposure parameter and the exposure parameter. The reference pupil diameter used when the poor physical condition detecting unit 105 detects the poor physical condition of the occupant may be calculated and determined based on the reference exposure parameter which is the second closest value to the parameter.

With reference to FIG. 4, a process in which the poor physical condition detection unit 105 detects the poor physical condition of the occupant will be described.
FIG. 4 is a diagram illustrating an example of a temporal change of a pupil diameter when flash light is emitted to a healthy human eye.
FIG. 4 shows an example where the pupil diameter is 3.5 mm before flash light irradiation. When the flash light is applied to the eye of a healthy person, the pupil of the healthy person starts miosis about 0.2 seconds after the flash light is applied due to light reflection. Thereafter, the pupil diameter becomes a minimum value about 1.0 second after the irradiation of the flash light. For example, when the pupil diameter before flash light irradiation is 3.5 mm, the pupil diameter in the state where the pupil is most constricted due to light reflection is 1 compared with the pupil diameter before flash light irradiation. About 0.0 mm. Further, thereafter, the pupil diameter returns so as to gradually approach the state before flash light irradiation at a lower speed than the speed at which the pupil diameter becomes smaller due to light reflection.

As described above, the poor physical condition detection unit 105 detects poor physical condition of the occupant based on the pupil diameter detected by the pupil diameter detection unit 103 and the reference pupil diameter determined by the reference pupil diameter determination unit 104. .

Specifically, for example, the poor physical condition detection unit 105 detects the pupil diameter detection unit 103 based on the reference pupil diameter determined by the reference pupil diameter determination unit 104 and the first period image acquired by the image acquisition unit 101. Based on the difference from the pupil diameter of the eye of the occupant of the vehicle 1, poor occupant condition is detected.

More specifically, for example, the poor physical condition detection unit 105 determines that the maximum value of the difference between the reference pupil diameter and the pupil diameter detected by the pupil diameter detection unit 103 is equal to or greater than a predetermined first threshold and a second threshold. The occupant's poor physical condition is detected based on whether it is within the range of less than or equal to. For example, the first threshold is 0.8 mm, and the second threshold is 1.2 mm. For example, when the maximum value of the difference between the reference pupil diameter and the pupil diameter detected by the pupil diameter detection unit 103 is 0.8 mm or more and less than 1.2 mm, the poor physical condition detection unit 105 indicates that the occupant's physical condition is normal. Is determined. Further, for example, when the maximum value of the difference between the reference pupil diameter and the pupil diameter detected by the pupil diameter detection unit 103 is not less than 0.8 mm and less than 1.2 mm, the poor physical condition detection unit 105 It is determined to be defective.

The first threshold value and the second threshold value are not limited to those described above, and are appropriately determined based on a well-known technique or common technical knowledge.
Further, for example, when the environmental illuminance is higher than the case shown in FIG. 4, the pupil diameter before the flash light is irradiated is smaller than the pupil diameter before the flash light shown in FIG. Therefore, when the environmental illuminance is higher than the case shown in FIG. 4, the difference between the pupil diameter before the flash light is irradiated and the pupil diameter in the state in which the pupil is most constricted due to light reflection is smaller than the case shown in FIG. . Therefore, the poor physical condition detection unit 105 determines that the maximum value of the difference between the reference pupil diameter and the pupil diameter detected by the pupil diameter detection unit 103 is, for example, equal to or more than the first threshold and the second threshold, which are predetermined for each reference pupil diameter. The poor physical condition of the occupant may be detected based on whether or not the range is less than the threshold value.

Also, specifically, for example, the poor physical condition detection unit 105 determines whether the pupil diameter detection unit 103 is based on the reference pupil diameter determined by the reference pupil diameter determination unit 104 and the first period image acquired by the image acquisition unit 101. The occupant's poor physical condition may be detected based on the detected ratio to the pupil diameter of the eye of the occupant of the vehicle 1.

More specifically, for example, the poor physical condition detection unit 105 determines that the ratio between the reference pupil diameter and the minimum value of the pupil diameter detected by the pupil diameter detection unit 103 is equal to or more than a predetermined first ratio threshold and equal to or less than a second ratio. The poor physical condition of the occupant is detected based on whether the ratio is less than the ratio threshold. For example, when the ratio between the reference pupil diameter and the pupil diameter detected by the pupil diameter detection unit 103 is indicated by the value of the pupil diameter detected by the pupil diameter detection unit 103 when the reference pupil diameter is 1, the first ratio The threshold is, for example, 0.6, and the second ratio threshold is, for example, 0.8. For example, when the ratio between the reference pupil diameter and the minimum value of the pupil diameter detected by the pupil diameter detection unit 103 is in the range of 0.6 or more and less than 0.8, the poor physical condition detection unit 105 Is determined to be normal. Further, for example, if the ratio between the reference pupil diameter and the minimum value of the pupil diameter detected by the pupil diameter detection unit 103 is not in the range of 0.6 or more and less than 0.8, the poor physical condition detection unit 105 It is determined that the physical condition is poor.

The first ratio threshold value and the second ratio threshold value are not limited to those described above, and are appropriately determined based on a well-known technique or common general technical knowledge.
In addition, for example, the poor physical condition detection unit 105 determines that the ratio between the reference pupil diameter and the minimum value of the pupil diameter detected by the pupil diameter detection unit 103 is equal to or more than a first ratio threshold that is predetermined for each reference pupil diameter and The poor physical condition of the occupant may be detected based on whether or not the range is less than the 2 ratio threshold.

Also, specifically, for example, the poor physical condition detection unit 105 determines whether the pupil diameter detection unit 103 is based on the reference pupil diameter determined by the reference pupil diameter determination unit 104 and the first period image acquired by the image acquisition unit 101. The occupant's poor physical condition may be detected based on the detected temporal change in the difference from the pupil diameter of the eye of the occupant of the vehicle 1.

More specifically, for example, the poor physical condition detection unit 105 determines a period from when the flash light is emitted to when the pupil diameter detected by the pupil diameter detection unit 103 becomes the minimum value, and the reference pupil diameter and the pupil diameter detection unit 103. The time change of the difference between the reference pupil diameter and the pupil diameter detected by the pupil diameter detection unit 103, which is calculated from the difference between the detected pupil diameter and the minimum value, is equal to or greater than a predetermined first change threshold and The occupant's poor physical condition is detected based on whether the occupant is in a range less than the second change threshold. The first change threshold is, for example, 0.8 mm per second, and the second change threshold is, for example, 1.2 mm per second. For example, if the temporal change of the difference between the reference pupil diameter and the pupil diameter detected by the pupil diameter detection unit 103 is in the range of 0.8 mm / sec or more and less than 1.2 mm / sec, the poor physical condition detection unit 105 Is determined to be in normal condition. Also, for example, the poor physical condition detection unit 105 is configured such that when the time change of the difference between the reference pupil diameter and the pupil diameter detected by the pupil diameter detection unit 103 is not more than 0.8 mm per second and less than 1.2 mm per second, It is determined that the occupant is in poor physical condition.

The first change threshold value and the second change threshold value are not limited to those described above, and are appropriately determined based on a well-known technique or common technical knowledge.
In addition, the poor physical condition detection unit 105 determines that the time change of the difference between the reference pupil diameter and the pupil diameter detected by the pupil diameter detection unit 103 is, for example, equal to or more than a first change threshold and predetermined for each reference pupil diameter. The poor physical condition of the occupant may be detected based on whether or not the range is less than the two change threshold.

Further, for example, based on the pupil diameter detected by the pupil diameter detection unit 103 and the reference pupil diameter determined by the reference pupil diameter determination unit 104, the poor physical condition detection unit 105 detects a poor physical condition of the occupant. The above methods may be combined.
In the first embodiment, as an example, the poor physical condition detection unit 105 determines whether the pupil diameter detection unit 103 is based on the reference pupil diameter determined by the reference pupil diameter determination unit 104 and the first period image acquired by the image acquisition unit 101. The description will be made on the assumption that the poor physical condition of the occupant is detected based on the detected difference with the pupil diameter of the eye of the occupant of the vehicle 1.

不良 The poor physical condition detection unit 105 outputs, for example, information indicating the detected poor physical condition of the occupant to the output device 13 or the like as physical condition information.

The poor physical condition of the occupant detected by the poor physical condition detection unit 105 will be described with reference to FIG.
FIG. 5 is a diagram showing an example of the poor physical condition of the occupant detected by the poor physical condition detection unit 105 in the poor physical condition detection device 100 according to the first embodiment.
The poor physical condition detection unit 105 detects that the occupant is in poor physical condition based on the pupil diameter detected by the pupil diameter detection unit 103 and the reference pupil diameter determined by the reference pupil diameter determination unit 104 by the above-described method. After that, for example, the type of poor physical condition of the occupant may be classified by comparing the pupil diameter detected by the pupil diameter detection unit 103 with the pupil diameter pattern shown in FIG.

Specifically, for example, when the minimum value of the pupil diameter detected by the pupil diameter detection unit 103 is 5 mm or more, it is determined that the pupil of the occupant is in the dilated pupil state. The dilated pupil state is, for example, a state in which an occupant has cardiac arrest, hypoglycemia, hypoxia, midbrain disorder, or drug addiction, or a state in which these conditions may be caused.
Further, for example, when the minimum value of the pupil diameter detected by the pupil diameter detection unit 103 is 1 mm or more and less than 2 mm, it is determined that the pupil of the occupant is in the state of severely inducible pupil. The tonic pupil state is, for example, a state in which the occupant is in a state of early cerebral hernia or organophosphorus poisoning, or a state in which these states may be caused.

Further, for example, when the minimum value of the pupil diameter detected by the pupil diameter detection unit 103 is less than 1 mm, it is determined that the pupil of the occupant is in the pinhole state. The pinhole condition is, for example, a condition in which the occupant has a condition such as bridge bleeding or drug poisoning, or a condition that may cause these conditions.
Further, for example, when the difference between the minimum values of the left and right pupil diameters detected by the pupil diameter detection unit 103 is 0.5 mm or more, it is determined that the pupils of the occupant are in the pupil disparity state. The pupillary disparity state is, for example, a state in which the occupant is a sign of cerebral hernia or a hypoglycemic attack, or a state that may cause these states.
Further, according to the above-described method, it is detected that the occupant is in poor physical condition based on the pupil diameter detected by the pupil diameter detection unit 103 and the reference pupil diameter determined by the reference pupil diameter determination unit 104. If the minimum value of the pupil diameter detected by the detection unit 103 is not in any of the above states, the poor physical condition detection unit 105 detects that the occupant is in a fatigued state.

With such a configuration, the poor physical condition detection device 100 according to Embodiment 1 can classify the poor physical condition of the occupant in more detail.

With reference to FIG. 6 and FIG. 7, an operation of the poor physical condition detection device 100 according to Embodiment 1 will be described.
FIG. 6 is a flowchart illustrating an example of processing of poor physical condition detection device 100 according to Embodiment 1.
The poor physical condition detection device 100 continuously executes, for example, the process of the flowchart in a period in which the vehicle 1 travels every time the flash light is irradiated.

First, in step ST601, the image obtaining unit 101 determines whether or not to irradiate the flash light source 12 with flash light. The determination as to whether to irradiate the flash light source 12 with the flash light is made based on, for example, whether or not a predetermined period has elapsed since the flash light source 12 was irradiated with the flash light, as described above.
In step ST601, when the image acquisition unit 101 determines that the flash light source 12 is not to be irradiated with flash light, the process of step ST601 is repeatedly executed until it is determined that the flash light source 12 is to be irradiated with flash light.
In step ST601, when the image acquisition unit 101 determines that the flash light source 12 is to be irradiated with flash light, the poor physical condition detection device 100 performs the processing of step ST602 and subsequent steps.

In step ST602, as described above, the image obtaining unit 101 controls the imaging device 11 to fix the exposure condition in the first period to the exposure condition before the flash light is irradiated.
Next, in step ST603, the image acquiring unit 101 causes the flash light source 12 to emit flash light by transmitting a control signal to the flash light source 12 as described above.
Next, in step ST604, as described above, the image obtaining unit 101 obtains an image in the first period at an interval of, for example, 0.2 seconds over the first period after irradiating the flash light.
Next, in step ST605, the exposure parameter acquisition unit 102 acquires the exposure parameter included in the header information of the first period image acquired by the image acquisition unit 101, as described above.
Next, in step ST606, reference pupil diameter determining section 104 determines the reference pupil diameter based on the exposure parameters acquired by exposure parameter acquiring section 102, as described above.

Next, in step ST607, pupil diameter detection section 103 detects the pupil diameter of the eye of the occupant of vehicle 1 based on the first period image acquired by image acquisition section 101, as described above. More specifically, for example, the pupil diameter detection unit 103 detects the vehicle in the first period based on the first period image acquired by the image acquisition unit 101 over the first period, for example, at intervals of 0.2 seconds. The minimum value of the pupil diameter of the eye of the first occupant is detected.
Next, in step ST608, the poor physical condition detection unit 105 determines the occupant's condition based on the pupil diameter detected by the pupil diameter detection unit 103 and the reference pupil diameter determined by the reference pupil diameter determination unit 104, as described above. Detects poor physical condition.
Next, in step ST609, the poor physical condition detection unit 105 outputs the physical condition information to the output device 13 or the like as described above. After executing the processing of step ST609, the poor-health detection apparatus 100 ends the processing of the flowchart, returns to the processing of step ST601, and repeatedly executes the processing of the flowchart.

In the process of the flowchart, the process of step ST606 and the process of step ST607 may be performed in the reverse order.

FIG. 7 is a flowchart illustrating an example of the details of the process of step ST608 shown in FIG.

First, in step ST701, the poor physical condition detection unit 105 determines that the maximum value of the difference between the reference pupil diameter and the pupil diameter detected by the pupil diameter detection unit 103 is equal to or more than the first threshold and less than the second threshold, as described above. It is determined whether it is within the range.
In step ST701, the poor physical condition detection unit 105 determines that the maximum value of the difference between the reference pupil diameter and the pupil diameter detected by the pupil diameter detection unit 103 is equal to or more than the first threshold and less than the second threshold. In this case, in step ST702, the poor physical condition detection unit 105 generates physical condition information indicating that the physical condition of the occupant is normal, as described above.
In Step ST701, when the poor physical condition detection unit 105 determines that the maximum value of the difference between the reference pupil diameter and the pupil diameter detected by the pupil diameter detection unit 103 is not in the range of the first threshold or more and less than the second threshold. In step ST703, the poor physical condition detection unit 105 determines whether or not the occupant is in the dilated pupil state, as described above.

In step ST703, when the poor physical condition detection unit 105 determines that the occupant is in the dilated pupil state, in step ST704, the poor physical condition detection unit 105 determines that the occupant is in poor condition, as described above, Physical condition information indicating that the occupant is in a dilated pupil state is generated.
If the occupant is determined not to be in a dilated pupil state by the poor physical condition detection unit 105 in step ST703, the poor physical condition detection unit 105 determines in step ST705 whether the occupant is in the pinhole state, as described above. Is determined.

In step ST705, if the occupant is determined to be in a pinhole state by the poor physical condition detection unit 105, the poor physical condition detection unit 105 determines in step ST706 that the occupant is in poor physical condition, as described above. Generates physical condition information indicating that it is in a pinhole state.
In step ST705, when the occupant is determined not to be in the pinhole state by the poor physical condition detection unit 105, in step ST707, the poor physical condition detection unit 105 determines whether or not the occupant is in the severely miotic state, as described above. Is determined.

In step ST707, if the poor physical condition detection unit 105 determines that the occupant is in a severely miotic state, in step ST708, the poor physical condition detection unit 105 determines that the physical condition of the occupant is poor, Physical condition information indicating that the occupant is in a state of severely miotic pupil is generated.
In step ST707, when the poor physical condition detection unit 105 determines that the occupant is not in the severely miotic state, in step ST709, the poor physical condition detection unit 105 determines whether or not the occupant is in the pupil disparate state, as described above. Is determined.

In step ST709, when the poor physical condition detecting unit 105 determines that the occupant is in the pupil disparity state, in step ST710, the poor physical condition detecting unit 105 determines that the physical condition of the occupant is poor, as described above. Generates physical condition information indicating that the pupil is in the pupil disparity state.
In step ST709, when the poor physical condition detection unit 105 determines that the occupant is not in the pupil disparity state, in step ST711, the poor physical condition detection unit 105 determines that the physical condition of the occupant is poor, and Generate physical condition information indicating that the subject is in a fatigue state.

If the occupant has congenital pupil disparity, if the occupant has pupil dilation due to eye surgery, etc., if the occupant has pupil dilation due to medication or the like that affects the pupil miosis, or Even when the occupant has dilated pupils due to blindness, the pupils may be unequal or dilated even in a normal condition.
Therefore, during a predetermined third period after the occupant gets on the vehicle 1, the poor physical condition detection unit 105 detects the poor physical condition of the occupant, and the poor physical condition detected by the poor physical condition detection unit 105. Is a predetermined physical condition, the physical condition detection unit 105 may not detect the predetermined physical condition of the occupant during the period in which the vehicle 1 travels.
More specifically, the predetermined poor physical condition is, for example, poor physical condition corresponding to an occupant's dilated pupil state or pupil disparity state.
Further, the predetermined third period is, for example, 30 minutes after the occupant gets on the vehicle 1. The predetermined third period is not limited to the above-described period, and may be longer or shorter than 30 minutes.

With this configuration, the poor-health detection device 100 according to Embodiment 1 suppresses erroneous detection of poor physical condition in an occupant who has a normal pupil or a dilated pupil even when the physical condition is normal. it can.

As described above, the poor physical condition detection device 100 includes the image acquisition unit 101 that acquires an image of the eye of the occupant of the vehicle 1 during a predetermined first period after the eye is irradiated with the flash light. An exposure parameter acquisition unit 102 that acquires an exposure parameter used when the image is captured; a pupil diameter detection unit 103 that detects a pupil diameter of an eye based on the image; and an exposure parameter acquisition unit 102 A reference pupil diameter determining unit 104 that determines a reference pupil diameter based on the acquired exposure parameters, a pupil diameter detected by the pupil diameter detection unit 103, and a reference pupil diameter determined by the reference pupil diameter determination unit 104. And a poor physical condition detecting unit 105 for detecting poor physical condition of the occupant.

With this configuration, the poor physical condition detection device 100 can accurately determine the physical condition of the occupant of the vehicle 1 based on the change in the pupil diameter due to the irradiation of the flash light.

In the first embodiment, as an example, the output device 13 has been described as being mounted on the vehicle 1, but the present invention is not limited to this. For example, a device for acquiring the physical condition information output from the physical condition detection device 100 such as the output device 13 is provided outside the vehicle 1 and detects physical condition detection via a wireless public line such as LTE (Long Term Evolution). The physical condition information may be acquired from the device 100.
With this configuration, an observer or the like outside the vehicle 1 can monitor the physical condition of the occupant of the vehicle 1 using the poor physical condition detection device 100.

In the first embodiment, as an example, the imaging device 11 is described as a digital camera capable of capturing a still image, but is not limited thereto. For example, if the imaging device 11 outputs an image capable of identifying the position or shape of the pupil in the captured image of the eye, and can change the exposure condition at the time of imaging, the imaging device 11 It may be a digital video camera that captures a moving image, an infrared camera, or the like.
With this configuration, the poor physical condition detection device 100 can obtain higher versatility.

Further, in the first embodiment, as an example, the imaging device 11 may appropriately adjust the exposure condition based on information indicating the brightness of the eyes of the occupant of the vehicle 1 output from the illuminance sensor provided in the imaging device 11. Has been described as being changed, but is not limited to this. For example, the exposure condition of the imaging device 11 is such that the poor physical condition detection device 100 determines the exposure condition based on the luminance of the image acquired from the imaging device 11 before irradiating the flash light, and determines the determined exposure condition as the poor physical condition detection. The setting may be made by the device 100 outputting to the imaging device 11.
With such a configuration, the poor physical condition detection device 100 can use the imaging device 11 in which the illuminance sensor is not provided, and can obtain higher versatility.

Further, in the first embodiment, as an example, the poor physical condition detection device 100 has been described as being mounted on the vehicle 1, but the present invention is not limited thereto. For example, the poor physical condition detection device 100 is provided outside the vehicle 1 and connected to the flash light source 12, the imaging device 11, the output device 13, and the like mounted on the vehicle 1 via a wireless public line such as LTE. It may be something. More specifically, for example, the poor physical condition detection device 100 controls the flash light source 12 via a wireless public line such as LTE, acquires a first period image and exposure parameters from the imaging device 11, and outputs the output device 13 For example, it may output physical condition information.
With this configuration, the poor physical condition detection device 100 can be installed outside the vehicle 1, and the degree of freedom of the installation position is increased.

In the first embodiment, as an example, the flash light source 12 is, for example, determined in advance by irradiating a flash light during a period in which the vehicle 1 travels, according to a control signal output from the poor physical condition detection device 100. Although it has been described that the flash light source 12 is irradiated with the flash light after the elapse of the period, the present invention is not limited to this. For example, the flash light source 12 is determined in advance by the control signal output from the poor physical condition detecting device 100 when the occupant's posture or the like has collapsed or the occupant's posture is still during the period in which the vehicle 1 travels. For example, when the period is continued, the flash light source 12 may be irradiated with flash light. The predetermined period here is, for example, 10 minutes. The predetermined period here is not limited to the above-mentioned period, and may be longer or shorter than 10 minutes.
With this configuration, the poor physical condition detection device 100 can perform physical condition detection at a timing when the physical condition of the occupant may have changed.

Furthermore, for example, when illuminating the flash light source 12 with the flash light, the poor physical condition detection device 100 determines whether or not the vehicle 1 is stopped. Flash light may be applied. The determination as to whether or not the vehicle 1 is stopped is based on the sensor information acquired by the poor-health detecting device 100 from, for example, a speed sensor (not shown) of the vehicle 1 connected to the poor-health detecting device 100. judge.
With this configuration, the poor physical condition detection device 100 can suppress the flash light emitted to the eyes from hindering driving, particularly when the occupant is a driver.

Embodiment 2 FIG.
With reference to FIG. 8, the poor physical condition detecting apparatus 100a according to the second embodiment will be described.
In particular, in the second embodiment, a method for generating the exposure pupil diameter information described in the first embodiment will be described.
The poor physical condition detection device 100a according to the second embodiment is applied to, for example, the vehicle 1.
FIG. 8 is a block diagram showing an example of a main part of poor physical condition detection device 100a according to the second embodiment.

The poor physical condition detection device 100a according to the second embodiment differs from the poor physical condition detection device 100 according to the first embodiment in that an exposure pupil diameter information generation unit 106 is added.
In the configuration of the poor physical condition detection device 100a according to the second embodiment, the same components as those of the poor physical condition detection device 100 according to the first embodiment are denoted by the same reference numerals, and redundant description will be omitted. That is, the description of the configuration in FIG. 8 to which the same reference numerals as those in FIG. 1 are given is omitted.

The vehicle 1 includes the poor physical condition detection device 100a, the imaging device 11, the flash light source 12, and the output device 13.

The imaging device 11 outputs the captured image of the eye part to the poor physical condition detection device 100a. In the second embodiment, as an example, a description will be given assuming that the imaging device 11 captures an eye of an occupant of the vehicle 1 by receiving a trigger signal from the poor physical condition detection device 100a.
Since the imaging device 11 according to the second embodiment is equivalent to the imaging device 11 described in the first embodiment, a detailed description is omitted.

The flash light source 12 emits flash light according to, for example, a control signal output from the poor physical condition detection device 100a. In the second embodiment, as an example, a description will be given assuming that the poor physical condition detection device 100a controls irradiation of flash light by the flash light source 12.
The flash light source 12 according to the second embodiment is the same as the flash light source 12 described in the first embodiment, and a detailed description will be omitted.

The poor physical condition detection device 100a generates physical condition information of the occupant, and outputs the generated physical condition information to the output device 13 and the like.
The poor physical condition detection apparatus 100a includes an image acquisition unit 101a, an exposure parameter acquisition unit 102a, a pupil diameter detection unit 103a, a reference pupil diameter determination unit 104, a poor physical condition detection unit 105, and an exposure pupil diameter information generation unit 106.

The image acquisition unit 101a acquires an image during a first period during a first period. In addition, the image acquisition unit 101a can acquire an image (hereinafter, referred to as a “non-influenced period image”) of the eye during a period in which the pupil diameter is not affected by the flash light (hereinafter, referred to as a “non-effect period”). It is something.
The non-influence period is, for example, a period from when the occupant gets on the vehicle 1 to when the flash light is emitted, or a sufficient period after the flash light is applied to the eyes of the occupant of the vehicle 1 (hereinafter, the “influence period”). This is the period after the elapse of "). The influence period is, for example, one minute. The influence period may be longer or shorter than one minute as long as the period is long enough to prevent the influence of the flash light on the pupil diameter.

In the second embodiment, as an example, the image acquisition unit 101a acquires, from the imaging device 11, a first period image or a non-influence period image captured by the imaging device 11 by transmitting a trigger signal to the imaging device 11. Description
In the second embodiment, as an example, the image acquisition unit 101a is described as transmitting a control signal to the flash light source 12 to irradiate the flash light source 12 with flash light.
The operations of the image acquiring unit 101a other than the above-described operations are the same as those of the image acquiring unit 101 described in the first embodiment, and a detailed description thereof will be omitted.

The exposure parameter acquisition unit 102a acquires an exposure parameter used when the first period image is captured. The exposure parameter acquisition unit 102a can acquire the exposure parameters used when the non-influence period image is captured.
In the second embodiment, as an example, the exposure parameter acquisition unit 102a acquires the exposure parameter included in the header information of the first period image or the unaffected period image acquired by the image acquisition unit 101a.
The operation of the exposure parameter acquisition unit 102a other than the above-described operation is the same as that of the exposure parameter acquisition unit 102 described in the first embodiment, and a detailed description thereof will be omitted.

The pupil diameter detection unit 103a detects the pupil diameter of the eye of the occupant of the vehicle 1 based on the first period image acquired by the image acquisition unit 101a. The pupil diameter detection unit 103a can detect the pupil diameter of the eye of the occupant of the vehicle 1 acquired by the image acquisition unit 101a.
The operation of pupil diameter detecting section 103a other than the above-described operation is the same as that of pupil diameter detecting section 103 described in the first embodiment, and thus a detailed description is omitted.

The exposure pupil diameter information generation unit 106 is configured to detect the vehicle based on the exposure parameters used when the non-effect period image acquired by the exposure parameter acquisition unit 102a is captured and the pupil diameter detection unit 103a based on the non-effect period image. Exposure pupil diameter information is generated based on the pupil diameter of the eye of the first occupant.
Specifically, for example, the exposure pupil diameter information generation unit 106 determines the exposure parameters used when the non-influence period image is captured and the eyes of the occupant eyes of the vehicle 1 detected by the pupil diameter detection unit 103a. The reference exposure parameter and the reference pupil diameter are added to the exposure pupil diameter information based on the pupil diameter.
More specifically, for example, the exposure pupil diameter information generation unit 106 uses the exposure parameter used when the non-influence period image acquired by the exposure parameter acquisition unit 102a is captured as an exposure pupil diameter as a reference exposure parameter. Add to information. Further, the exposure pupil diameter information generation unit 106 sets the pupil diameter of the eye of the occupant of the vehicle 1 detected by the pupil diameter detection unit 103a based on the non-influence period image as a reference pupil diameter, and It is added to the exposure pupil diameter information in association with it.
That is, the reference exposure parameter of the exposure pupil diameter information is the exposure parameter used when the non-effect period image acquired by the exposure parameter acquisition unit 102a is captured. In addition, the reference pupil diameter of the exposure pupil diameter information is based on the pupil diameter of the eye of the occupant of the vehicle 1 detected by the pupil diameter detection unit 103a based on the non-effect period image.

For example, when the pupil diameter of the eye of the occupant of the vehicle 1 detected by the pupil diameter detection unit 103a based on the non-influence period image is used as the reference pupil diameter, the exposure pupil diameter information generation unit 106 determines If the reference pupil diameter associated with the exposure parameter for use exists in the exposure pupil diameter information, the reference pupil diameter and the eyes of the occupant of the vehicle 1 detected by the pupil diameter detection unit 103a based on the non-influence period image. A new reference pupil diameter may be determined based on the pupil diameter of the part. More specifically, for example, the exposure pupil diameter information generation unit 106 calculates the reference pupil diameter and the pupil diameter of the eye of the occupant of the vehicle 1 detected by the pupil diameter detection unit 103a based on the non-influence period image. May be calculated, and the calculated average value may be used as a new reference pupil diameter.

Since the reference pupil diameter determining unit 104 and the poor physical condition detecting unit 105 according to the second embodiment are the same as the reference pupil diameter determining unit 104 and the poor physical condition detecting unit 105 described in the first embodiment, detailed description will be omitted. .

In addition, the reference pupil diameter of the exposure pupil diameter information is based on the non-influence period image captured in a predetermined second period (hereinafter, referred to as “second period”) after the vehicle 1 starts running. It is desirable to include the reference pupil diameter determined based on the pupil diameter of the eye of the occupant of the vehicle 1 detected by the pupil diameter detection unit 103a. The second period is, for example, 10 minutes after the vehicle 1 starts running. The second period is not limited to 10 minutes, and may be longer or shorter than 10 minutes as long as the degree of fatigue of the occupant of the vehicle 1 due to running of the vehicle 1 is small. The period during which the degree of fatigue of the occupant of the vehicle 1 due to the traveling of the vehicle 1 is small is appropriately determined based on a known technique or common technical knowledge.
The reference pupil diameter of the exposure pupil diameter information is determined based on the pupil diameter of the eye of the occupant of the vehicle 1 detected by the pupil diameter detection unit 103a based on the non-influence period image captured in the second period. By including the pupil diameter, it is possible to more accurately detect the occupant's poor physical condition based on the reference pupil diameter that is less affected by the degree of fatigue.

The image acquisition unit 101a, the exposure parameter acquisition unit 102a, the pupil diameter detection unit 103a, the reference pupil diameter determination unit 104, the poor physical condition detection unit 105, and the exposure pupil diameter information generation in the poor physical condition detection apparatus 100a according to the second embodiment. Each function of the unit 106 may be realized by the processor 201 and the memory 202 in the hardware configuration illustrated in FIGS. 2A and 2B in the first embodiment, or may be realized by the processing circuit 203. It may be something.

With reference to FIG. 9, the operation of poor physical condition detecting device 100a according to the second embodiment will be described.
FIG. 9 is a flowchart illustrating an example of processing of poor physical condition detection device 100a according to Embodiment 2.
The poor physical condition detection device 100a continuously executes, for example, the processing of the flowchart in a period in which the vehicle 1 runs every time the flash light is irradiated.

First, in step ST901, the image acquisition unit 101a determines whether to irradiate the flash light source 12 with flash light.
In step ST901, when it is determined by the image acquisition unit 101a to irradiate the flash light source 12 with the flash light, the poor physical condition detection device 100a performs the processing after step ST902. The processing from step ST902 to step ST909 shown in FIG. 9 is the same as the processing from step ST602 to step ST609 shown in FIG.

In step ST901, when the image obtaining unit 101a determines that the flash light source 12 is not to be irradiated with the flash light, in step ST911, the image obtaining unit 101a determines whether or not the period is the non-effect period.
In step ST911, if the image acquiring unit 101a determines that the period is not the non-effect period, the poor physical condition detection device 100a returns to the process of step ST901.
In step ST911, when the image acquiring unit 101a determines that the period is the non-influence period, in step ST912, the image acquiring unit 101a acquires the non-influence period image.

Next, in step ST913, as described above, the exposure parameter acquiring unit 102a acquires the exposure parameter included in the header information of the non-influence period image acquired by the image acquiring unit 101a.
Next, in step ST914, pupil diameter detecting section 103a detects the pupil diameter of the occupant's eye of vehicle 1 based on the non-influence period image acquired by image acquiring section 101a, as described above.
Next, in step ST915, as described above, the exposure pupil diameter information generation unit 106 determines the exposure parameters used when the non-influence period image is captured and the occupant of the vehicle 1 detected by the pupil diameter detection unit 103a. The reference exposure parameter and the reference pupil diameter are added to the exposure pupil diameter information based on the pupil diameter of the eye. More specifically, the exposure pupil diameter information generation unit 106 uses the exposure parameter used when the non-effect period image acquired by the exposure parameter acquisition unit 102a is captured as the reference exposure parameter, The pupil diameter of the eye of the occupant of the vehicle 1 detected by the unit 103a based on the non-influence period image is added as the reference pupil diameter to the exposure pupil diameter information in association with the reference exposure parameter. After executing the processing of step ST915, the poor-health detection device 100a ends the processing of the flowchart, returns to the processing of step ST901, and repeatedly executes the processing of the flowchart.

In the process of the flowchart, the process of step ST913 and the process of step ST914 may be performed in the reverse order.

As described above, the reference exposure parameter of the exposure pupil diameter information of the poor physical condition detection apparatus 100a is an exposure parameter used when the non-influence period image acquired by the exposure parameter acquiring unit 102a is captured, and The reference pupil diameter of the exposure pupil diameter information of the detection device 100a is based on the pupil diameter of the eye detected by the pupil diameter detection unit 103a based on the non-effect period image.
With this configuration, the poor physical condition detection device 100a generates exposure pupil diameter information based on the exposure parameter acquired during traveling and the pupil diameter of the eye of the occupant of the vehicle 1 detected during traveling. Therefore, it is possible to accurately determine the physical condition of the occupant of the vehicle 1 based on a change in the pupil diameter due to the irradiation of the flash light without preparing exposure pupil diameter information in advance.

Embodiment 3 FIG.
With reference to FIG. 8, the poor physical condition detection device 100b according to the third embodiment will be described.
The poor physical condition detection device 100b according to Embodiment 3 is applied to, for example, the vehicle 1.
The poor physical condition detection device 100b according to the third embodiment detects poor physical condition of a plurality of occupants in the vehicle 1.
FIG. 10 is a block diagram illustrating an example of a main part of poor-health detecting device 100b according to Embodiment 3.

The poor physical condition detection device 100b according to Embodiment 3 is different from the poor physical condition detection device 100a according to Embodiment 2 in that an occupant identification unit 107 is added.
In the configuration of the physical condition detection device 100b according to the third embodiment, the same components as those of the physical condition detection device 100a according to the second embodiment are denoted by the same reference numerals, and redundant description will be omitted. That is, the description of the configuration in FIG. 10 to which the same reference numerals as those in FIG.

The vehicle 1 includes, for example, a physical condition detection device 100b, an imaging device 11, a flash light source 12, and an output device 13.

The poor physical condition detection device 100b according to Embodiment 3 generates physical condition information corresponding to each of a plurality of occupants, and outputs the generated physical condition information to the output device 13 and the like. Details of the poor physical condition detection device 100b will be described later.

The imaging device 11 photographs the eyes of each of a plurality of occupants of the vehicle 1. The imaging device 11 outputs images of the eyes of a plurality of occupants of the vehicle 1 to the poor physical condition detection device 100b. For example, a plurality of imaging devices 11 are provided in the vehicle 1.
In the third embodiment, as an example, in the imaging device 11, the vehicle 1 is provided with two imaging devices 11d and 11p, and the imaging device 11d and the imaging device 11p are respectively associated with each seat on which the occupant sits. It will be described as being provided. More specifically, for example, the imaging device 11d is associated with the driver's seat of the vehicle 1 and captures an image of the eye of a passenger sitting in the driver's seat of the vehicle 1. Further, the imaging device 11p is associated with the passenger seat of the vehicle 1, and captures an image of an eye of a passenger sitting on the passenger seat of the vehicle 1.

In the third embodiment, as an example, the imaging device 11 is described as being provided with two imaging devices 11d and 11p, but is not limited thereto. For example, the number of the imaging devices 11 may be three or more. In the third embodiment, as an example, the imaging device 11d and the imaging device 11p will be described as being associated with the driver's seat and the passenger's seat, but this is not a limitation. For example, the imaging device 11d may be associated with a front row seat or the like in the vehicle 1, and the imaging device 11p may be associated with a rear row seat or the like in the vehicle 1. In the third embodiment, as an example, a description will be given assuming that a plurality of imaging devices 11 are provided, but this is not a limitation. For example, one imaging device 11 is provided in the vehicle 1, and the imaging device 11 performs panning, tilting, zooming, or the like to sequentially photograph the eyes of each of a plurality of occupants of the vehicle 1. It may be.
Since the imaging device 11d and the imaging device 11p are the same as the imaging device 11 described in the second embodiment, detailed description will be omitted.

The flash light source 12 irradiates flash light to the eyes of a plurality of occupants of the vehicle 1. For example, a plurality of flash light sources 12 are provided in the vehicle 1.
In the third embodiment, as an example, as the flash light source 12, two

flash light sources

12d and 12p are provided in the vehicle 1, and the

flash light sources

12d and 12p are respectively associated with the respective seats on which the occupants sit. It will be described as being provided. More specifically, for example, the flash light source 12d is associated with the driver's seat of the vehicle 1 and irradiates the eye of a passenger sitting in the driver's seat of the vehicle 1 with flash light. The flash light source 12p is associated with the passenger seat of the vehicle 1 and irradiates the flash light to the eyes of the occupant sitting on the passenger seat of the vehicle 1.

In the third embodiment, as an example, the flash light source 12 is described as being provided with two

flash light sources

12d and 12p, but the present invention is not limited to this. For example, the number of flash light sources 12 may be three or more. In the third embodiment, as an example, the flash light source 12d and the flash light source 12p will be described as being associated with the driver's seat and the passenger's seat, but are not limited thereto. For example, the flash light source 12d may be associated with a front row seat or the like in the vehicle 1, and the flash light source 12p may be associated with a rear row seat or the like in the vehicle 1. In the third embodiment, as an example, a description will be given assuming that a plurality of flash light sources 12 are provided, but the present invention is not limited to this. For example, one flash light source 12 may be provided in the vehicle 1 and emit the flash light so that the light reaches the eyes of a plurality of occupants of the vehicle 1.
The flash light source 12d and the flash light source 12p are the same as the flash light source 12 described in the second embodiment, and a detailed description will be omitted.

The poor physical condition detection device 100b will be described.
The poor physical condition detecting device 100b includes an image obtaining unit 101b, an exposure parameter obtaining unit 102b, a pupil diameter detecting unit 103b, a reference pupil diameter determining unit 104b, a poor physical condition detecting unit 105b, an exposure pupil diameter information generating unit 106b, and an occupant specifying unit 107. Having.

The occupant identification unit 107 identifies an occupant of the vehicle 1.
The occupant identification unit 107 does not need to be capable of identifying an individual occupant as long as the occupant can distinguish a plurality of occupants of the vehicle 1.
More specifically, for example, the occupant identification unit 107 identifies the occupant of the vehicle 1 based on the occupant's position in the vehicle 1. For example, the occupant identification unit 107 identifies the occupant in association with the seat based on a detection signal obtained from a detection sensor (not shown) such as a pressure sensor or a human sensor provided for each seat where the occupant sits. I do.
In the third embodiment, as an example, a description will be given assuming that an occupant is sitting in both the driver's seat and the passenger seat.

The image acquiring unit 101b acquires a first period image captured by the imaging device 11. More specifically, for example, the image acquiring unit 101b acquires, from the imaging device 11, a first period image of the occupant specified by the occupant specifying unit 107 in association with the seat.
In the third embodiment, as an example, the image acquisition unit 101b acquires a first period image captured by the imaging device 11d and the imaging device 11p from each of the imaging device 11d and the imaging device 11p. More specifically, the image acquisition unit 101b performs the imaging device 11d in a predetermined period (first period) after the flash light is emitted from the flash light source 12d to the eyes of the occupant sitting in the driver's seat of the vehicle 1. Acquires an image (first-period image) of the eye part from the imaging device 11d. In addition, the image acquisition unit 101b sets the imaging device 11p to the eye unit during a predetermined period (first period) after the flash light is emitted from the flash light source 12p to the eyes of the occupant sitting in the front passenger seat of the vehicle 1. Is acquired from the imaging device 11p.

The image acquisition unit 101b may be capable of acquiring the non-influence period image captured by the imaging device 11d and the imaging device 11p from the imaging device 11d and the imaging device 11p, respectively.
Operations other than the above-described operations in the image acquisition unit 101b according to the third embodiment are the same as those in the image acquisition unit 101a described in the second embodiment, and a detailed description thereof will be omitted.

The exposure parameter acquisition unit 102b acquires the respective exposure parameters used when the first period image acquired by the image acquisition unit 101b is acquired from each of the imaging device 11d and the imaging device 11p.
The exposure parameter acquisition unit 102b may be capable of acquiring the respective exposure parameters used when the non-influence period image acquired by the image acquisition unit 101b is acquired from each of the imaging device 11d and the imaging device 11p. .
The operation other than the above-described operation in the exposure parameter acquisition unit 102b of the third embodiment is the same as that of the exposure parameter acquisition unit 102a described in the second embodiment, and thus a detailed description is omitted.

The pupil diameter detection unit 103b detects the pupil diameter of the eye for each occupant identified by the occupant identification unit 107. More specifically, the pupil diameter detection unit 103b detects the pupil diameter of the eye for each occupant based on the first period images acquired by the image acquisition unit 101b from each of the imaging device 11d and the imaging device 11p.
The pupil diameter detection unit 103b may be capable of detecting the pupil diameter of the eye for each occupant based on the non-influence period image acquired by the image acquisition unit 101b from each of the imaging device 11d and the imaging device 11p.
The operation of pupil diameter detecting section 103b other than the above-described operation is the same as that of pupil diameter detecting section 103a described in the second embodiment, and thus a detailed description is omitted.

The reference pupil diameter determining unit 104b determines, for each occupant identified by the occupant identifying unit 107, based on the exposure parameters when the imaging device 11d and the imaging device 11p each capture the first period image acquired by the exposure parameter acquisition unit 102b. Determine the reference pupil diameter.
More specifically, for example, the reference pupil diameter determination unit 104b includes an occupant identification unit based on exposure parameters when the imaging devices 11d and 11p each capture an image during the first period, and exposure pupil diameter information. The reference pupil diameter is determined for each occupant 107.
In the third embodiment, as an example, the description will be made assuming that the exposure pupil diameter information referred to by reference pupil diameter determination unit 104b is prepared in advance for each occupant associated with each seat of vehicle 1.

The exposure pupil diameter information referred to by the reference pupil diameter determination unit 104b is not limited to the above. For example, the exposure pupil diameter information referred to by the reference pupil diameter determination unit 104b includes an exposure parameter when the imaging device 11d and the imaging device 11p acquired by the exposure parameter acquisition unit 102b each capture an image with no influence period, and a pupil diameter detection. The exposure pupil diameter information generation unit 106b generates for each occupant based on the pupil diameter of the eye detected for each occupant based on the non-influence period image acquired by the unit 103b from each of the imaging devices 11d and 11p. But it is good.
By configuring the exposure pupil diameter information generation unit 106b to generate the exposure pupil diameter information referred to by the reference pupil diameter determination unit 104b for each occupant, when the occupant of the vehicle 1 is unspecified, or Even when the seat is unspecified, the poor physical condition detection device 100b can detect poor physical condition for each occupant based on appropriate exposure pupil diameter information.

The operation of the reference pupil diameter determining unit 104b other than the above-described operation is the same as that of the reference pupil diameter determining unit 104 described in the second embodiment, and a detailed description thereof will be omitted.

The poor physical condition detection unit 105b is based on the pupil diameter of the eye of the occupant of the vehicle 1 detected by the pupil diameter detection unit 103b for each occupant, and the reference pupil diameter determined for each occupant by the reference pupil diameter determination unit 104b. Detects poor physical condition for each occupant.
The poor physical condition detection unit 105b generates, for example, physical condition information indicating a physical condition of the occupant detected for each occupant, and outputs the generated physical condition information to the output device 13 or the like.
The operation of the poor physical condition detection unit 105b is the same as that of the poor physical condition detection unit 105 described in the second embodiment except for the above-described operation, and a detailed description thereof will be omitted.

Note that the image acquisition unit 101b, the exposure parameter acquisition unit 102b, the pupil diameter detection unit 103b, the reference pupil diameter determination unit 104b, the poor physical condition detection unit 105b, and the exposure pupil diameter information generation unit in the poor physical condition detection device 100b according to Embodiment 3. 106b and the respective functions of the occupant identification unit 107 may be realized by the processor 201 and the memory 202 in the hardware configuration illustrated in FIGS. 2A and 2B in the first embodiment, or may be a processing circuit. 203.

With reference to FIG. 11, an operation of poor physical condition detection device 100b according to the third embodiment will be described.
FIG. 11 is a flowchart illustrating an example of a process of poor physical condition detection device 100b according to Embodiment 3.
The poor physical condition detection device 100b continuously executes, for example, the process of the flowchart in a period in which the vehicle 1 runs every time the flash light is irradiated.

First, in step ST1101, the image acquisition unit 101b determines whether to irradiate the flash light source 12d with flash light.
In step ST1101, when the image acquisition unit 101b determines that the flash light source 12d is to be irradiated with the flash light, the poor physical condition detection device 100b performs the process of step ST1102.

In step ST1102, as described above, the image acquisition unit 101b controls the imaging device 11d to fix the exposure condition in the first period to the exposure condition before flash light irradiation.
Next, in step ST1103, as described above, the image acquisition unit 101b transmits a control signal to the flash light source 12d to irradiate the flash light source 12d with flash light.
Next, in step ST1104, as described above, the image acquisition unit 101b acquires the first period image from the imaging device 11d at intervals of, for example, 0.2 seconds over the first period after irradiating the flash light. I do.
Next, in step ST1105, as described above, the exposure parameter acquiring unit 102b acquires the exposure parameter included in the header information of the first period image acquired by the image acquiring unit 101b from the imaging device 11d.
Next, in step ST1106, the reference pupil diameter determining unit 104b determines, for example, the reference pupil diameter of the occupant sitting in the driver's seat based on the exposure parameters of the imaging device 11d acquired by the exposure parameter acquiring unit 102b, as described above. decide.

Next, in step ST1107, as described above, the pupil diameter detection unit 103b, based on the first period image acquired by the image acquisition unit 101b from the imaging device 11d, detects, for example, the eyes of the occupant sitting in the driver's seat of the vehicle 1. The pupil diameter of the part is detected. More specifically, for example, the pupil diameter detecting unit 103b performs the first pupil diameter detection based on the first period image acquired by the image acquiring unit 101b from the imaging device 11d at intervals of, for example, 0.2 seconds over the first period. In one period, for example, the minimum value of the pupil diameter of the eye of the occupant sitting in the driver's seat of the vehicle 1 is detected.
Next, in step ST1108, as described above, the poor physical condition detection unit 105b determines the pupil diameter detected by the pupil diameter detection unit 103b and the reference pupil diameter determined by the reference pupil diameter determination unit 104b. Based on the pupil diameter, for example, the poor physical condition of the occupant sitting in the driver's seat is detected.
Next, in step ST1109, the poor physical condition detection unit 105b outputs, for example, the physical condition information of the occupant sitting in the driver's seat to the output device 13 or the like as described above. After performing the processing of step ST1109, the physical condition detection device 100b performs the processing of step ST1111.
In step ST1101, if the image acquisition unit 101b determines that the flash light source 12d is not to be irradiated with the flash light, the poor physical condition detection device 100b performs the process of step ST1111.

In step ST1111, the image acquiring unit 101b determines whether to irradiate the flash light source 12p with flash light.
If it is determined in step ST1111 that the image acquisition unit 101b does not irradiate the flash light source 12p with flash light, the poor physical condition detection device 100b ends the processing of the flowchart, returns to step ST1101, and returns to step ST1101. The processing of the flowchart is repeatedly executed.
If it is determined in step ST1111 that the image acquisition unit 101b irradiates the flash light source 12p with flash light, the poor physical condition detection device 100b performs the process of step ST1112.

In step ST1112, as described above, the image acquisition unit 101b controls the imaging device 11p to fix the exposure condition in the first period to the exposure condition before flash light irradiation.
Next, in step ST1113, as described above, the image acquisition unit 101b transmits a control signal to the flash light source 12p to irradiate the flash light source 12p with flash light.
Next, in step ST1114, as described above, the image acquiring unit 101b acquires the first period image from the imaging device 11p at intervals of, for example, 0.2 seconds over the first period after irradiating the flash light. I do.
Next, in step ST1115, as described above, the exposure parameter acquisition unit 102b acquires the exposure parameter included in the header information of the non-influence period image acquired by the image acquisition unit 101b from the imaging device 11p.
Next, in step ST1116, the reference pupil diameter determining unit 104b determines, for example, the reference pupil diameter of the occupant sitting in the passenger seat based on the exposure parameters of the imaging device 11p acquired by the exposure parameter acquiring unit 102b, as described above. decide.

Next, in step ST1117, as described above, pupil diameter detecting section 103b, based on the first period image acquired by image acquiring section 101b from imaging apparatus 11p, outputs, for example, the eyes of an occupant sitting in the passenger seat of vehicle 1. The pupil diameter of the part is detected. More specifically, for example, the pupil diameter detection unit 103b performs the first pupil diameter detection based on the first period image acquired by the image acquisition unit 101b from the imaging device 11p at, for example, 0.2 second intervals over the first period. In one period, for example, the minimum value of the pupil diameter of the eye of the occupant sitting in the passenger seat of the vehicle 1 is detected.
Next, in step ST1118, as described above, the poor physical condition detection unit 105b determines the pupil diameter detected by the pupil diameter detection unit 103b and the pupil diameter determined by the reference pupil diameter determination unit 104b. Based on the pupil diameter, for example, the poor physical condition of the occupant sitting in the passenger seat is detected.
Next, in step ST1119, as described above, the poor physical condition detection unit 105b outputs, for example, the physical condition information of the occupant sitting in the passenger seat to the output device 13 or the like. After executing the processing of step ST1119, the poor-health detection device 100b ends the processing of the flowchart, returns to the processing of step ST1101, and repeatedly executes the processing of the flowchart.

In the process of the flowchart, the order of the processes of step ST1106 and step ST1107 may be reversed. In the processing of the flowchart, the processing of step ST1116 and the processing of step ST1117 may be performed in the reverse order.

As described above, the poor physical condition detection device 100b includes the image acquisition unit 101b that acquires an image of the eye of the occupant of the vehicle 1 during a first predetermined period after the eye is irradiated with the flash light. An exposure parameter acquisition unit 102b that acquires an exposure parameter used when the image is captured; a pupil diameter detection unit 103b that detects a pupil diameter of an eye based on the image; and an exposure parameter acquisition unit 102b A reference pupil diameter determining unit 104b that determines a reference pupil diameter based on the acquired exposure parameters, a pupil diameter detected by the pupil diameter detection unit 103b, and a reference pupil diameter determined by the reference pupil diameter determination unit 104b. The pupil diameter detecting unit 103b includes an illness detecting unit 105b for detecting an illness of the occupant, and an occupant identifying unit 107 for identifying the occupant. The pupil diameter of the eye is detected for each occupant, and the poor physical condition detection unit 105b determines the pupil diameter of the eye detected by the pupil diameter detection unit 103b for each occupant, and the reference pupil diameter determination unit 104b determines for each occupant. Based on the reference pupil diameter, it is configured to detect poor physical condition for each occupant.

With such a configuration, even when there are a plurality of occupants in the vehicle 1, the poor physical condition detection device 100b can determine the physical condition of the occupants of the vehicle 1 based on the change in the pupil diameter due to the irradiation of the flash light for each occupant. Can be done accurately.

In the present invention, within the scope of the present invention, any combination of the embodiments can be freely combined, or any component of each embodiment can be modified, or any component can be omitted in each embodiment. .

体 The poor physical condition detecting device according to the present invention can be applied to a vehicle.

1 {vehicle, 11, 11d, 11p} imaging device, 12, 12d, 12p {flash light source, 13} output device, 100, 100a, 100b poor physical condition detection device, 101, 101a, 101b {image acquisition unit, 102, 102a, 102b} exposure parameter acquisition Unit, 103, 103a, 103b {pupil diameter detection unit, 104, 104b} reference pupil diameter determination unit, 105, 105b {poor physical condition detection unit, 106, 106b} exposure pupil diameter information generation unit, 107 {occupant identification unit, 201} processor, 202} memory, 203 processing circuit.

Claims

An image acquisition unit configured to acquire an image of the eye of a vehicle occupant during a predetermined first period after the eye is irradiated with the flash light;
An exposure parameter acquisition unit that acquires an exposure parameter used when the image is captured,
A pupil diameter detection unit that detects a pupil diameter of the eye based on the image,
A reference pupil diameter determination unit that determines a reference pupil diameter based on the exposure parameters acquired by the exposure parameter acquisition unit,
The pupil diameter detected by the pupil diameter detection unit, based on the reference pupil diameter determined by the reference pupil diameter determination unit, based on the poor physical condition detection unit that detects poor physical condition of the occupant,
An apparatus for detecting poor physical condition, comprising:
The reference pupil diameter determination unit obtains exposure pupil diameter information having a plurality of reference exposure parameters and reference pupil diameters respectively associated with the plurality of reference exposure parameters, and the exposure parameter acquisition unit acquires The poor physical condition detection device according to claim 1, wherein the poor physical condition detection unit determines the reference pupil diameter to be used when the poor physical condition detection unit detects the poor physical condition of the occupant based on the exposure parameter.
The image acquisition unit is capable of acquiring an image of the eye portion during a period in which the pupil diameter is not affected by the flash light,
The exposure parameter acquisition unit is capable of acquiring an exposure parameter used when the image is captured during the period,
The pupil diameter detection unit is capable of detecting a pupil diameter of the eye based on the image captured during the period,
The reference exposure parameter of the exposure pupil diameter information is the exposure parameter used when the image is captured during the period acquired by the exposure parameter acquisition unit,
The pupil diameter for reference of the exposure pupil diameter information is based on the pupil diameter detected by the pupil diameter detection unit based on the image captured during the period. The method according to claim 2, wherein Physical condition detection device.
The reference pupil diameter of the exposure pupil diameter information is the pupil diameter detected by the pupil diameter detection unit based on the image captured in a predetermined second period after the vehicle starts running. The poor physical condition detecting device according to claim 3, further comprising the reference pupil diameter determined on the basis of:
The poor physical condition detection unit is based on a difference between the reference pupil diameter determined by the reference pupil diameter determination unit and the pupil diameter detected by the pupil diameter detection unit based on the image acquired by the image acquisition unit. The poor physical condition detecting device according to claim 1, wherein the poor physical condition of the occupant is detected.
The poor physical condition detection unit is based on the ratio of the reference pupil diameter determined by the reference pupil diameter determination unit and the pupil diameter detected by the pupil diameter detection unit based on the image acquired by the image acquisition unit. The poor physical condition detecting device according to claim 1, wherein the poor physical condition of the occupant is detected.
The poor physical condition detection unit is a time difference between the reference pupil diameter determined by the reference pupil diameter determination unit and the pupil diameter detected by the pupil diameter detection unit based on the image acquired by the image acquisition unit. The poor physical condition detection device according to claim 1, wherein the physical condition of the occupant is detected based on the change.
The image acquisition unit acquires the image, the exposure parameter acquisition unit acquires the exposure parameter, the pupil diameter detection unit detects the pupil diameter, and the poor physical condition detection unit includes the occupant. 2. The apparatus for detecting poor physical condition according to claim 1, wherein each processing of the processing for detecting poor physical condition is continuously performed during a period in which the vehicle travels each time the flash light is irradiated. 3.
In a predetermined third period after the occupant gets in the vehicle, the poor physical condition detecting unit detects the physical condition of the occupant, and the physical condition detected by the physical condition detecting unit is not good. The physical condition detection device according to claim 8, wherein when the physical condition is the predetermined physical condition, the physical condition detection unit does not detect the predetermined physical condition of the occupant during a period in which the vehicle travels.
An occupant identification unit that identifies the occupant is provided,
The pupil diameter detection unit detects the pupil diameter for each occupant identified by the occupant identification unit,
The ill-health detecting unit, for each of the occupants, based on the pupil diameter detected by the pupil diameter detecting unit for each occupant, and the reference pupil diameter determined for each occupant by the reference pupil diameter determining unit. The poor physical condition detecting device according to claim 1, wherein the poor physical condition is detected.
The image acquisition unit acquires an image of the eye of the occupant of the vehicle during a predetermined first period after the eye is irradiated with the flash light,
An exposure parameter acquisition unit acquires an exposure parameter used when the image is captured, a pupil diameter detection unit detects a pupil diameter of the eye based on the image,
A reference pupil diameter determining unit determines a reference pupil diameter based on the exposure parameters obtained by the exposure parameter obtaining unit,
The poor physical condition detecting unit detects the physical condition of the occupant based on the pupil diameter detected by the pupil diameter detecting unit and the reference pupil diameter determined by the reference pupil diameter determining unit. Poor health detection method.