JP3224875B2 - Image-based signal ignoring vehicle detection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting a vehicle ignoring a signal at an intersection for the purpose of suppressing a traffic accident and recording an image including a vehicle number of the vehicle.
About the law.

[0002]

2. Description of the Related Art One year of road traffic fatalities in Japan
It has reached 15,000, and it is becoming more serious. Ignoring traffic lights at intersections can easily cause traffic accidents, and it is hoped that traffic signals will be thoroughly respected. However, in general, detection and control of vehicles ignoring signals are often performed manually, and it is currently difficult to perform sufficient control.

[0003] In recent years established images processing techniques are applied to vehicle detection, establish the proposed method a large number of vehicles to effectively detect only signals ignored vehicle intended for crossing to concentrate passes It has not been. If we can automatically to reliably detect an intersection signal ignoring the vehicle only using the image processing apparatus records the vehicle number of the vehicle, Ki out to clamp down on the driver of the vehicle on the basis of this recording intersection It is effective in suppressing accidents at the airport.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and a method and a signal for detecting a vehicle ignoring a signal at an intersection using an image processing technique which has been remarkably developed in recent years. It is intended to newly proposed how to record a video including a vehicle number of ignored vehicle at the right shooting (imaging) position. As a result, a warning can be given to a vehicle ignoring a traffic light when a violation occurs, or measures can be taken to control the vehicle at a later date. This is effective in suppressing accidents at intersections. together,
In particular, the present invention also proposes a method of appropriately discriminating and detecting a vehicle ignoring a signal at night, and capturing an image of the offending vehicle (vehicle number) at a predetermined imaging position using illumination.

[0005]

For the above problem solving SUMMARY OF THE INVENTION In the image type signal ignore vehicle detection method of the first invention of the instant application, TV turtle
To obtain a video signal corresponding to image a region including the straight road side portion of intersection from the outflow roadside by La, a direction substantially perpendicular to the straight path in the image in the traveling direction rear side of the vehicle from the stop line A one-field unit of luminance data group consisting of luminance levels at respective temporal positions in a video signal corresponding to each of a plurality of measurement points on a pair of set measurement lines is sequentially obtained. A luminance data group consisting of the corresponding luminance levels is extracted at predetermined intervals and held as reference road surface data, and the luminance data group is compared with the reference road surface data and data having a sufficient difference is detected as a vehicle corresponding point,
While the intersection traffic light corresponding to the straight road is showing a red light, the second measurement on the outflow road side within a predetermined time after detecting the vehicle corresponding point on the first measurement line on the inflow road side of the measurement lines. When a vehicle corresponding point is detected on the line, the vehicle corresponding to the vehicle corresponding point is determined to be a vehicle ignoring the signal, a warning indicator is driven to call attention to the driver, and the paired measurement is performed. A vehicle corresponding point is detected on a second measurement line on an outflow road within a predetermined time after a vehicle corresponding point is detected on a first measurement line on an inflow road of a pair of measurement lines set at a position different from the line. Is detected, the video signal at that time is recorded as a still image.

A pair of meters contributing to driving the warning indicator
Set multiple measurement lines, and
First measurement on the inflow channel side using any one pair of measurement lines
After a corresponding point on the line is detected,
When a vehicle corresponding point is detected on the second measurement line on the exit side
The vehicle is ignored and the warning indicator is activated.
Is preferred.

Further, one of the factors contributing to the driving of the warning indicator is provided.
A pair of measurement lines set at different positions from the pair of measurement lines
Vehicle corresponding point on the first measurement line on the inflow side of the in
Within a predetermined time after detecting the
When a vehicle corresponding point is detected on the
And record the obtained video signal as a still image
Is preferred.

[0008]

In order to solve the above-mentioned problem, in the image signal neglecting vehicle detection method of each invention of the present application, an image signal of an intersection obtained by a TV camera is image-processed, and while an intersection signal is displaying a red signal, A vehicle corresponding point is detected on a second measurement line on an outflow road within a predetermined time after a vehicle corresponding point is detected on a first measurement line on an inflow road among measurement lines set orthogonally to the corresponding straight path. Is detected, that is, a vehicle that goes straight in response to the red signal is detected, and the vehicle is determined to be a signal-ignoring vehicle.
A vehicle that normally travels in the orthogonal direction does not pass through the pair of measurement lines in the order described above, and thus is not determined to be a signal-ignoring vehicle. If it is determined that the vehicle is a signal-ignoring vehicle, the warning indicator is driven to call the driver's attention. In addition, the second measurement on the outflow path side within a predetermined time after detecting the vehicle corresponding point on the first measurement line on the inflow path side of the pair of measurement lines set at positions different from the pair of measurement lines. When a vehicle corresponding point is detected on the line, the video signal is recorded as a still image. Therefore, an image including the vehicle number of the signal-ignoring vehicle is recorded, which is useful for warning and controlling the driver. In addition, during the night, a vehicle corresponding point is detected on the first measurement line on the inflow path side of the pair of measurement lines set at the different position, and then, within a predetermined time, on the second measurement line on the outflow path side. When a vehicle corresponding point is detected, a clear image can be obtained by driving and illuminating the near-infrared illuminating device, and can be recorded as a still image.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of the present invention uses a high-resolution TV camera and image processing technology to determine the moving direction of a vehicle and detect a vehicle ignoring a signal. An image including a car number is recorded at this location in search of an optimal location. At night, the same device is used to detect the headlights of the vehicle, and the near-infrared light illuminator emits stroboscopic light to photograph the vehicle number, thereby achieving the same purpose as during the day.

Hereinafter, each invention of the present application will be described based on embodiments with reference to the drawings. First, an image signal ignoring vehicle detection device used in the present invention will be described. FIG.
1 is a block diagram of an embodiment of an image signal ignoring vehicle detection apparatus (image signal ignoring vehicle number photographing apparatus) used in the present invention.

An apparatus 100 shown in the figure has a TV as an image pickup means.
A camera 10, a signal from a traffic signal at an intersection, and a signal from a traffic signal at an intersection are input and a signal-ignored vehicle detection unit 200 detects a signal-ignored vehicle by a predetermined process described below. an image memory 70 for recording an image comprising a near infrared radiation strobe emits near-infrared light at night
It is constructed comprising the lighting device 80. A warning indicator 71 for displaying a warning for a vehicle ignoring a signal is connected to the signal ignoring vehicle detection unit 200, and a still image transmission device 90 for transmitting a recorded image to a predetermined remote location is connected to the image memory 70. ing.

FIG. 2 is a schematic plan view showing an example of installation of the above-mentioned embodiment device at an intersection CR with a traffic light, and shows only one set of devices corresponding to the straight traveling road R1. To accommodate all inlet channel intersection, it is necessary total of four TV cameras 10 and four positions of the near-infrared lighting device 80 at a minimum, further corresponds generally to the same number of signal ignore vehicle detection unit Requires 200. Note that the signal-ignored vehicle detection unit 200
The (image processing unit) can be commonly used depending on the processing content and the processing speed.

[0013] shown intersection traffic SG and TV camera 10 and the two lanes each two near-infrared illumination device 80 in response to the substantially same position facing the straight road R1 of the CR was erected on the roadside It is provided by an appropriate method such as fixing to a projecting portion of a column. A signal ignoring vehicle detection unit 200 is installed in the vicinity thereof, and an appropriate signal indicating the present state of the signal light of the traffic signal SG is inputted for discrimination at the time of a red light. The straight road R1 has two lanes, R1i1 and R1i2 are inflow paths to the intersection, R1o1 and R1o2 are outflow paths when the vehicle goes straight ahead, and LS indicates a stop line.
In the figure, LA1, LB1, LA2, LB2, etc. indicate positions corresponding to measurement lines described later. Note that C11,
.., C42, etc., indicate traveling vehicles.

[0014] TV camera 10 is, for example, a CCD camera, as shown in the image example in FIG. 3 from above is provided at one corner of the intersection point C R as described above, the intersection of the predetermined detection area, i.e., straight road intersection An area including one side is imaged from the outflow road side, and a corresponding NTSC video signal is transmitted to (the luminance data conversion unit 20 of) the signal-ignored vehicle detection unit 200.

The signal-ignored vehicle detection unit 200 is a part for processing a video signal to determine a vehicle ignoring a signal and for giving an instruction to record a foreground including the vehicle number of the vehicle as a still image. At night, a driving signal for causing the near-infrared illumination device 80 to emit strobe light at an appropriate timing is also transmitted. The signal-ignored vehicle detection unit 200 is used for image processing which has been conventionally applied for grasping traffic conditions and the like.
It has substantially the same configuration and function as that proposed in Japanese Patent No. 188005, which performs image processing on a video signal obtained from an imaging means to detect a vehicle. Therefore, when a vehicle traveling in a plurality of lanes is targeted, individual vehicles can be identified for each lane, and a vehicle with no signal can be detected for each lane.

In the embodiment, similarly to the conventional image-type vehicle detection apparatus, first, through image processing similar to the conventional one, a luminance data group corresponding to a measurement point group on each measurement line is determined at predetermined time intervals. , And the presence of the vehicle is recognized based on these luminance data groups. Thereafter, a vehicle that ignores the signal is detected by a predetermined process described later. In addition, the detection signal of the vehicle ignoring the signal is used for displaying a warning or recording an image.

Here, the signal-ignoring vehicle detecting section 200 will be briefly described. FIG. 7 is a detailed block diagram of a signal-ignoring vehicle detection section (image processing apparatus) 200 according to the embodiment, and has many parts common to the apparatus disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 4-188005. The signal-ignored vehicle detection unit 200 is generally composed of a luminance data conversion unit 20, an arithmetic processing unit 30, and a control unit 40.

The luminance data converter 20 is a synchronizing signal extracting circuit 21 for obtaining a horizontal synchronizing signal and a vertical synchronizing signal from a video signal. Based on these synchronizing signals, the present search position on the search line is digitized and the corresponding horizontal coordinate is obtained. A horizontal address counter 22 and a vertical address counter 23 for obtaining vertical coordinates, a digital comparator 24 for comparing these outputs with coordinates sequentially designated by a microprocessor 41 (described later) and generating a capture signal at the moment of coincidence, A video A / D conversion circuit 25 quantifies the luminance of the video signal at the corresponding moment in accordance with the fetched signal, obtains luminance data, and outputs it. The input unit has a video amplifier 27 for amplifying the transmitted video signal to an appropriate level,
Following this, a clamp level fixing circuit 28 for normalizing the video signal to a constant amplitude prior to the A / D conversion is also provided.

The arithmetic processing unit 30 is a circuit for receiving the luminance data from the video A / D conversion circuit 25 and averaging a plurality of luminance data and calculating a correlation. Therefore, a signal processor 31 is used, and a storage unit necessary for storing data is also provided.

The control unit 40 controls the above-described units, receives the data from the arithmetic processing unit 30 and further performs an arithmetic process on the data to detect the presence of a vehicle and determine whether the vehicle is a signal-ignoring vehicle. It is a part that determines whether or not it is at an optimum position for image recording and outputs various control signals to a subsequent device. The control unit 40 includes a microprocessor 41, a ROM 42 storing a control program, a RAM 43 for storing data, and an I / O circuit 44 for outputting.
45 is a CPU by which the microprocessor 41 exchanges data and addresses, control commands and response signals with other parts.
It is a bus.

The illustrated device also includes a DC power supply 5.
1. Clock circuit 52 supplied to each unit, imaging unit 10
D / A that sends out a signal for increasing the sensitivity of the imaging means 10 when the level of the video signal from
A conversion circuit 53 and the like are provided. In addition, monitor TV6
The personal computer 61 and the personal computer 61 are auxiliary equipment required when setting the measurement points so that the image apparatus is adapted to the actual installation site. In addition, since it is described in detail in the specification of the already-filed application, the description is omitted.

In the signal-ignoring vehicle detection unit 200 of the above-described device,
A signal-ignoring vehicle is detected by a predetermined process described later . The detection signal of the signal-ignoring vehicle obtained in this manner can be used in various useful forms.

In the embodiment, an image memory 70 is connected to the output of the signal-ignoring vehicle detection unit 200, and when the signal-ignoring vehicle reaches a proper imaging position, the video signal, that is, the image including the vehicle number is stored as a still image . . The image memory 7
0, a still image transmission device 90 is connected, and the recorded still image is transmitted to a remote control center or the like via a communication line 9.
1 is transmitted. Further, the warning indicator 71 can be driven by the detection signal to call the driver's attention.

[0024] In addition, at night, detects that the signal neglected vehicle reaches the imaging proper position near infrared light - emitting driving device 81
Imaging and recording the signals ignored wheel in synchronization therewith to illuminate the signal ignore wheel is operated near infrared lighting device 80 through the.

Next, a description will be given of a method of detecting a vehicle ignoring image signals according to the present invention using the above-described apparatus. FIG. 6 is a simplified flowchart showing one embodiment of each method of the present invention. In each of the invention methods of the present application, for example, using the above-described device, like the conventional image-based vehicle detection method, first,
Under the control of the control unit, luminance data groups corresponding to the measurement point groups on each measurement line are sequentially obtained at predetermined time intervals through image processing similar to the conventional one.

[0026] That is, the by using said video signal luminance data converter 20, a plurality of measurement points on the two straight lines to be supposed respectively pairs laterally in the image as shown in FIG. 3
Set, sequentially obtains the luminance data group at the certain time of the set luminance level respectively determined in temporally corresponding luminance signals to the position of each measurement point for each field. Based on the luminance data group obtained corresponding to each of the measurement point groups, the signal-ignored vehicle detection unit 200 detects the vehicle with the ignored signal . The detection signal is used for displaying a warning or recording an image. If a plurality of lanes are to be processed, detection of a vehicle ignoring the signal is performed for each lane. Illumination for imaging at night, which will be described later, is also performed for each lane.

In the method of detecting an image signal-ignored vehicle according to the first invention of the present application, for example, using the above-described device , first, in substantially the same manner as in general image processing, a video signal is sequentially obtaining each luminance level in the plurality of luminance signals that temporally corresponding to the measurement point set in the image <br/> s luminance data group as one set asking for each field using. The process during this period is the same as the conventional one, but will be briefly described below.

First, as shown in FIG. 1, an image of a detection area such as a predetermined intersection is picked up by the image pickup means 10 (CCD camera), and a corresponding NTSC video signal is sent to the luminance data converter 20. Note that, for example LA1 as shown in FIG. 3 in response to the detection region, LA2, ..., a plurality of measurement lines are set in pairs, the respective plurality of measurement points at predetermined intervals on each measurement line It is set (assumed).

In the luminance data converter 20, a horizontal synchronizing signal and a vertical synchronizing signal are obtained from a video signal by a synchronizing signal extracting circuit 21. The horizontal address counter 22 and the vertical address counter 23 operate based on these synchronization signals,
The current search position on the search line is shown one after another. These outputs are compared with the coordinates designated by the microprocessor 41, and the digital comparator 24 generates a capture signal at the moment when they match. Video A according to this capture signal
The / D conversion circuit 25 digitizes the luminance at the corresponding instant of the video signal and outputs it as luminance data along with the corresponding horizontal and vertical coordinates. In the input section, the transmitted video signal is amplified to an appropriate level by a video amplifier 27, and a subsequent clamp level fixing circuit 28 normalizes the video signal to a constant amplitude prior to A / D conversion.

[0030] In this manner, a time position in the luminance signal corresponding to each of a plurality of measurement points set in substantially the entire area of the image of the drawing using the video signal is shown. brightness level is obtained. From these luminance levels, a vehicle binarized data group in which one screen (one frame) is binarized is obtained. That is, when there is no vehicle that is constantly updated at appropriate intervals (corresponding to only the road surface), data that shows a sufficient difference based on comparison with a luminance data group composed of luminance data at each measurement point is assigned to the vehicle. The presence of the vehicle at each measurement point at a certain time corresponding to the point is detected.

For this purpose, the arithmetic processing section 30 having the signal processor 31 receives the luminance data from the video A / D conversion circuit 25, averages a plurality of luminance data at high speed, and calculates a correlation. After that, the luminance data of each measurement point is binarized by comparing with reference road surface data including the luminance level of the road surface extracted at appropriate time intervals, and a set of binarized data groups corresponding to one field is determined. You.

That is, the method of the present invention includes the following series of steps (see FIG. 6). 1. An image signal obtained from an outflow road side of an area including one side of the straight road of the intersection CR to be sensed by an imaging means such as a CCD camera is obtained. 2. In the video signal, a plurality of positions (temporal positions in the video signal) corresponding to measurement points located on a pair of measurement lines set in a direction substantially orthogonal to the straight traveling path are set in advance and correspond to these positions. sequentially obtain each corresponding luminance Les <br/> bell or Ranaru luminance data group the words each measurement point. 3. Vehicle holds the corresponding luminance data groups in the case of only road that does not exist Te extracted as a reference road surface level data by <br/> at predetermined intervals. It should be noted that the reference road surface level data is corrected as time elapses according to the conditions such as the illuminance of the road. 4. Binarized luminance data groups compared to the reference road surface level for holding sequentially obtain a vehicle binary data group. That is, when a sufficient difference is recognized (both high and low cases), it is regarded as a vehicle corresponding point where the vehicle exists, and the value “1” is set.
(Also, if necessary, the vehicle is detected by appropriate processing and a sensing signal is transmitted). The above-described processes are similar to the conventional image-based vehicle detection method. For example, Japanese Patent Application Laid-Open No. 4-188005 also discloses a vehicle detection principle based on a pattern correlation comparison between a road luminance pattern and a vehicle luminance pattern. Together with a more detailed description.

Control unit 4 provided with microprocessor 41
0 controls the above-described units, and the arithmetic processing unit 30
, Receives the above-mentioned vehicle binarized data group, and further performs various processes for detecting a vehicle ignoring the signal. That is, based on the thus obtained vehicle binarization data in the present invention, further performed by the control unit 40 a predetermined process to be described below, performs signal ignore vehicle detection for the purpose of the present application. Subsequently, a process for this will be described.

Each pair of measurement lines ( LA1 , LB1 , LA2 , LB2 , LA3 , LB ) shown on the monitor screen of FIG.
3) is used to determine the traveling direction of the detected vehicle and determine whether or not the vehicle is a signal-ignoring vehicle. That is, when the meeting signal SG indicates a red signal, the control unit 40 sets the measurement line ( LA 1, LB ) set at a position beyond the stop line (on the rear side in the traveling direction of the vehicle from the stop line). 1) Or, when the vehicle detects (passes) ( LA2 , LB2 ) in this order (the first measurement line on the inflow path side of the pair of measurement lines ).
Outflow within a predetermined time after detecting the vehicle corresponding point on the inside
(When a vehicle corresponding point is detected on the second measurement line on the roadside)
And it is determined that there is a signal-ignoring vehicle. In response to the signal-ignored vehicle detection signal, for example, a warning indicating that the signal has been neglected can be suppressed by transmitting a warning indicating that the signal has been ignored to a warning indicator 71 provided at an appropriate position where the vehicle driver can easily recognize the signal.

As described above, in the present invention, the passage of the detection line
Since the vehicle is evaluated including the order, it is possible to drive normally according to the traffic light.
The vehicles C31, C32 or C41, C42, etc.
Measurement line (LA1,LB1) or (LA2,LB
2) The vehicle travels substantially parallel to
Even if both are detected, they must be detected in the above order.
It is not determined that the vehicle is a signal-ignoring vehicle.
4, see time chart).

Further, a pair of measurement lines (LA3,LB
3) is a position where an image suitable for reading the car number can be obtained.
The vehicle is set in this order as described above.
Judgment of the detection (passing) (determining the traveling direction)
Used to detect and ignore images
It is. That is, the vehicle is connected to the measurement line (LA3,LB3)
If the vehicle passes in the order of
The outgoing signal is sent to the image memory 70, and the vehicle number
Is recorded as a still image in the image memory 70.
Is done. This recorded still image will be displayed at a later date
It is used as a material when giving attention. The current
Although still images can be collected on site,
Is transmitted through the communication line 91 by the still image transmission device 90.
And sent to the responsible departments such as remote control centers.
You.

Now, the apparatus of the present embodiment is used at night in a vehicle.
Video signal corresponding to the headlight of
Detects ignored vehicles and records the number
The vehicle is detected at a position where an image suitable for reading the number is obtained.
Near red in response to thatOutside lightLighting using the lighting device 80
By doing so, a clear recorded image is obtained. That is,
A set of measurement lines for recording (LA3,LB
3) determines that the vehicle has been detected (passed) in this order
(Driving direction is discriminated) and the vehicle is regarded as a signal ignored vehicle
Trigger signal is near redDeparture from outside lineIt is sent to the optical drive 81 and
Due to near redOutside lightLighting device 80 emits strobe light
The vehicle is illuminated. Clear, illuminated images are synchronized
The image is recorded in the image memory 70 as a still image. Recorded
Still images are collected or transmitted as described above.
(See FIG. 5, time chart).

As described above, it is possible to detect a vehicle ignoring a signal at an intersection using an image processing technique and to photograph the vehicle number at an optimal photographing position, including at night. At an intersection of a plurality of lanes, a vehicle that ignores a signal can be detected for each individual lane and illuminated for each lane.

The detection of the vehicle itself is not limited to the above-described example, and various image processing methods can be appropriately used, and an optimum one can be selected as needed. In short, as long as the vehicle can be detected along the measurement line and the detection order can be determined, the present application can be applied to detect a vehicle ignoring the signal in addition to the input from the traffic signal.

In the above description, a case has been described in which a still image is obtained in order to identify a vehicle after detecting a signal-ignoring vehicle, but only the registration number of the signal-ignoring vehicle is extracted and identified by applying image processing. It is also conceivable that the data is obtained as data and recorded or transmitted.

[0041]

Each image type signals ignored vehicle detection method of the present application as described in detail above, according to the present invention, the pair of measurement that are set in the road perpendicular direction in the image containing a straight road side portion of more crossing points on the imaging hands stage < br /> sequentially obtain the corresponding brightness level into a plurality of measurement points on the line, the intersection traffic (SG) is the reference road surface data of red light in the current While browsing
Compared to data, when detecting a vehicle corresponding points in the second measurement La <br/> Lee down on the outflow roadside on the first measurement line inflow roadside from the detection of the vehicle corresponding points within a predetermined time the by determining the signal negligible vehicle, at the intersection where the vehicle from all sides to inflow and outflow, it can be appropriately detected signal ignoring vehicles only, this
No signal is displayed on the warning display in response to the vehicle detection signal
In addition to giving a warning that you have violated your eyes,
Of a pair of measurement lines set at a different position from
Vehicle corresponding point on the first measurement line on the inflow path side of
Within a predetermined time from the second measurement line on the outflow road side
When a corresponding point is detected, the video signal at that time is
By recording as an image, subsequent violations can be suppressed.
Can be.

Further, a pair of total meters set at the different positions are provided.
Vehicle on the first measurement line on the inflow channel side
Second measurement on the outflow road side within a predetermined time after detecting the corresponding point
If a vehicle corresponding point is detected on the line,
By driving the device and lighting it, the signal can be reliably transmitted even at night.
Record the video including the car number of the car that has ignored the number as a still image.
Can be.

[Brief description of the drawings]

FIG. 1 illustrates a method for detecting a vehicle ignoring an image signal according to the present invention.
FIG. 1 is a block diagram showing an embodiment of an apparatus for performing the above.

FIG. 2 is a diagram showing an arrangement of imaging means and the like at an intersection according to the present application.

FIG. 3 is a diagram showing an image of an intersection, measurement points, and the like according to the present application.

FIG. 4 is a time chart showing a vehicle detection output, an illumination output, an image recording output, and the like according to the image signal ignoring vehicle detection method of each invention of the present application.

FIG. 5 is a time chart showing a vehicle detection output and the like according to the image signal ignoring vehicle detection method of each invention of the present application.

FIG. 6 is a flowchart showing one embodiment of a dangerous traffic event detection method according to each invention of the present application.

FIG. 7 is a block diagram illustrating an example of a signal-ignoring vehicle detection unit (image processing unit) according to the present invention.

[Explanation of symbols]

10 ... imaging unit, 70 ... image memory, 80 ... infrared ray illumination device, 200 ... signal ignore vehicle detector, CR ... intersection, S
G ... Intersection traffic light

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G08G 1/04 G06T 1/00 G08G 1/017 H04N 7/18

Claims (3)

(57) [Claims] 1. An image including an area on one side of a straight road at an intersection is taken from an outflow road side by a TV camera, and a corresponding video signal is obtained. The luminance data group of one field unit consisting of the luminance level at each time position in the video signal corresponding to each of the plurality of measurement points on the pair of measurement lines set on the rear side in the traveling direction is sequentially obtained. A luminance data group consisting of a luminance level corresponding to the road surface at the measurement point is extracted at predetermined intervals and held as reference road surface data, and the luminance data group is compared with the reference road surface data. While the intersection traffic light corresponding to the straight road is presenting a red signal, the traffic signal flows within a predetermined time after the vehicle corresponding point is detected on the first measurement line on the inflow road side of the measurement lines. When a vehicle corresponding point is detected on the second measurement line on the roadside, a vehicle corresponding to the vehicle corresponding point is determined to be a vehicle that ignores a signal, a warning indicator is driven to call attention to a driver, and A second measurement line on the outflow channel side within a predetermined time after detecting a vehicle corresponding point on the first measurement line on the inflow channel side of the pair of measurement lines set at positions different from the pair of measurement lines. An image signal ignoring vehicle detection method, characterized in that when a vehicle corresponding point is detected, a video signal at that time is recorded as a still image. 2. A plurality of pairs of measurement lines contributing to driving of the warning indicator are set, and one of the pair of measurement lines is set on the first measurement line on the inflow path side. 2. The image display according to claim 1, wherein when the vehicle corresponding point is detected on the second measurement line on the outflow road side within a predetermined time after detecting the vehicle corresponding point, the vehicle is determined to be a signal ignoring vehicle and the warning indicator is driven. Signal ignoring car detection method. 3. A vehicle corresponding point is detected on a first measurement line on an inflow path side of a pair of measurement lines set at a position different from a pair of measurement lines contributing to driving of the warning indicator. 3. The method according to claim 1, wherein when a vehicle corresponding point is detected on the second measurement line on the outflow road side within a predetermined time from, the near-infrared illumination device is driven and the obtained video signal is recorded as a still image. 4. Image-based signal ignoring vehicle detection method.