JP2010021791A - Image capturing apparatus, and image processing method therefor, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a speed of processing an operation of image processing, and to reduce capacity of size of a picked-up image, even when an image capturing apparatus includes a color filter having spectral sensitivity with respect to a predetermined emission line. <P>SOLUTION: The image capturing apparatus includes an RGB filter, and the color filter having the spectral sensitivity with respect to the predetermined emission line, and includes a reading means capable of separately reading data on pixels of the RGB filter and data on pixels on the color filter. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an imaging device including an RGB filter and a color filter having spectral sensitivity with respect to a predetermined bright line, an image processing method thereof, and a program.

  In recent years, a multiband image pickup device (for example, a multiband camera) that can acquire a spectral image of a subject by photographing the subject using a plurality of color filters having different transmittance wavelength ranges has been put into practical use. Yes. A multi-band camera or the like can reproduce colors that cannot be reproduced only with RGB three-color filters (hereinafter referred to as RGB filters).

  Various ideas have also been made for the color arrangement method of the color filter itself. For example, the multiband camera disclosed in Patent Document 1 includes five or more color filters, and the resolution of the color filter is increased by arranging more G-color color filters than RGB color filters among RGB filters. The decline is suppressed. Increasing the type of color of the color filter decreases the luminance resolution, but recent cameras have a large number of pixels, and such a problem is not noticeable.

JP 2005-286649 A

  However, when a normal photograph is taken, it is not necessarily considered that a multiband image is necessary in all scenes. For example, a case is assumed where image processing is performed in a multiband camera having six color filters. In this case, even when the output is RGB output, the number of input colors is doubled compared to a normal RGB filter, so color interpolation processing and white balance (WB) processing must be performed for each color. Therefore, the computation takes time. Further, even when an image is recorded, there is a problem that the memory is unnecessarily consumed if the subject does not require multiband information.

  The present invention has been made in view of the above-described problems, and improves the processing speed of image processing operations even when a color filter having spectral sensitivity with respect to a predetermined bright line is provided. An object is to reduce the capacity of the captured image.

The present invention is an imaging apparatus including an RGB filter and a color filter having spectral sensitivity with respect to a predetermined bright line, and separately reads out pixel data of the RGB filter and pixel data of the color filter. It has the reading means which can do.
An image processing method of the present invention is an image processing method of an imaging apparatus comprising an RGB filter and a color filter having spectral sensitivity with respect to a predetermined bright line, wherein the RGB filter pixel data and the color filter It has a reading step capable of reading pixel data separately.
A program of the present invention is a program for controlling an image pickup apparatus including an RGB filter and a color filter having spectral sensitivity with respect to a predetermined bright line, the pixel data of the RGB filter and the color filter This is a program for causing a computer to execute a reading step capable of separately reading pixel data.

  According to the present invention, even when a color filter having spectral sensitivity with respect to a predetermined bright line is provided, the processing speed of the image processing calculation can be improved and the captured image capacity can be reduced.

Embodiments according to the present invention will be described below with reference to the drawings.
(First embodiment)
In the present embodiment, an imaging device (hereinafter referred to as a multiband camera) that includes a color filter corresponding to mercury lamps, sodium lamps, and the like, which are artificial lights having bright lines, and can output appropriate images even under these light sources. Will be described.

FIG. 1 is a block diagram of a multiband camera according to the present embodiment.
The multiband camera 100 includes an imaging unit 1, an image processing unit 5, a control unit 9, a storage unit 10, and a communication unit 11.
The imaging unit 1 includes, for example, a photographing optical system 2, a low-pass filter 3, and an imaging element 4. The image processing unit 5 performs image processing on the captured image captured by the imaging unit 1. The image processing unit 5 includes, for example, a digital signal processing unit 6, a correction processing unit 7, and a memory 8. The storage unit 10 is configured to be removable from the multiband camera 100. The storage unit 10 stores a captured image processed by the image processing unit 5. The control unit 9 outputs commands for driving and controlling the components of the multiband camera 100 described above. The communication unit 11 is configured to be able to communicate with an external device connected to the multiband camera 100. The communication unit 11 transmits / receives data stored in the memory 8 or the storage unit 10 to / from an external device.

Next, the configuration of an example of the image sensor of the multiband camera according to the present embodiment will be described with reference to FIG. FIG. 2 is a diagram illustrating a partial configuration of an image pickup device having a honeycomb structure.
The image sensor includes pixels 201 to 203 corresponding to R pixels, G pixels, and B pixels that a normal three-band camera has. Each of the pixels 201 to 203 is provided with a color filter (RGB filter) having the same spectral transmittance as that of a color filter provided in a normal three-band camera. In addition, the imaging element has a plurality of pixels 204 to 207 adjacent to the pixels 201 to 203. Each of the pixels 204 to 207 is provided with a color filter having spectral sensitivity in the bright line of the artificial illumination. Here, the multiband camera according to the present embodiment is configured so that the data of the pixels 201 to 203 and the data of the pixels 204 to 207 can be read separately.

  The imaging device may be either a CCD (charge coupled device) or a CMOS (complementary metal oxide semiconductor). Further, FIG. 2 shows the configuration of the imaging element having a honeycomb structure, but the present invention is not limited to this case. For example, in the case of an image sensor having a large number of pixels so that the resolution can be maintained, as shown in FIG. 3, the spectral sensitivity is applied to the bright lines of the artificial illumination at regular intervals in the G pixels 302 of a normal Bayer array. Pixels 304 to 307 provided with color filters having the above may be arranged.

Here, the emission line spectrum of an artificial illumination such as a mercury lamp or a sodium lamp will be briefly described.
First, a mercury lamp is a light source that utilizes light radiation generated by arc discharge in mercury vapor inside a glass tube. Specifically, the light source of the mercury lamp is a greenish bluish white (5700K) light source having an emission line spectrum of 404.7, 435.8, 546.1, 577.0, 579.1 nm. With ultraviolet radiation at 365 nm. A fluorescent lamp is also a kind of mercury lamp, and often has a spectrum at a common wavelength.

  Next, the sodium lamp is a lamp that uses light emission by arc discharge in sodium vapor, such as a low-pressure sodium lamp or a high-pressure sodium lamp. In particular, low pressure sodium lamps utilize the radiation of D-rays (589 nm and 589.6 nm) emitted by sodium during arc discharge. In addition, the high pressure sodium lamp has a higher vapor rendering property by broadening the emission spectrum by making the vapor pressure of sodium higher than that of the low pressure sodium lamp.

Next, the spectral sensitivity distribution of the color filter provided in the multiband camera will be described with reference to FIG.
Characteristic lines 401 to 403 indicate the spectral distribution of the RGB filter of a normal camera. A characteristic line 401 is a spectral sensitivity distribution of the B filter included in the B pixel 203. A characteristic line 402 is a spectral sensitivity distribution of the G filter included in the G pixel 202. A characteristic line 403 is a spectral sensitivity distribution of the R filter included in the R pixel 201.
Characteristic lines 404 to 407 indicate spectral distributions of color filters having spectral sensitivity corresponding to predetermined bright lines. Here, color filters corresponding to four types of artificial light sources are provided in order to correspond to the mercury lamp, the fluorescent lamp, and the sodium lamp, which are the artificial light sources having the general bright lines described above. These color filters are color filters having high transmittance in the emission line wavelength region where the wavelength band is narrow.

  In the present embodiment, the color filter having the spectral sensitivity distribution of the characteristic line 404 and the characteristic line 405 corresponds to the emission line of the mercury lamp and has a high transmittance with respect to the emission lines having wavelengths of 430 nm and 540 nm, respectively. The color filter having the spectral sensitivity distribution of the characteristic line 406 corresponds to the emission lines of the mercury lamp and the sodium lamp, and has a high transmittance with respect to the emission line having a wavelength of 580 nm. Further, the color filter having the spectral sensitivity distribution of the characteristic line 407 corresponds to the bright line often possessed by the three-wavelength tube of the fluorescent lamp, and has a high transmittance with respect to the bright line having a wavelength near 610 nm.

  Although the case where the above-described color filter has spectral transmittance characteristics corresponding to emission lines having wavelengths of 430 nm, 540 nm, 580 nm, and 610 nm has been described, the present invention is not limited to this case. For example, a color filter corresponding to a mercury spectrum near 400 nm may be used. Moreover, although the case where the color filter mentioned above was four types was demonstrated, it is not restricted to this case, For example, what is necessary is just one or more types. For example, when three types of color filters are used, color filters having the same spectral sensitivity may be arranged for the pixels 204 and 207 in FIG. In this case, if the spectral sensitivity close to the color filter of the G pixel among the three types is arranged in the pixel 204 and the pixel 207, resolution reduction can be minimized.

Next, the operation processing of the multiband camera will be described with reference to the flowchart shown in FIG. Here, a case where the user sets each mode for the multiband camera will be described.
The multiband camera of the present embodiment has three shooting modes. The first mode (mode 1) is a mode in which the subject is not under an artificial illumination light source having a bright line such as a mercury lamp or a fluorescent lamp, and is a mode in which only the pixels 201 to 203 having normal RGB filters are photographed. The second mode (mode 2) is a case where the subject is under the light source of the artificial illumination having the bright line described above, and a color filter pixel (hereinafter referred to as a luminance pixel) 204 having spectral sensitivity at a predetermined luminance. In this mode, signals ˜207 are read out and optimum processing is performed according to each light source. The third mode (mode 3) is a mode in which all signals of the pixels 201 to 207 are read out, and image quality is prioritized over processing speed and image capacity.

First, in step S501, the user selects and sets one of the above-described shooting modes. The control unit 9 of the multiband camera 100 detects the selected shooting mode. The processing described above corresponds to an example of mode detection means.
Next, in step S <b> 502, the control unit 9 actually shoots the subject via the imaging unit 1 in accordance with a user's shooting instruction. At this time, the control unit 9 may read out only necessary pixel data based on the set photographing mode, reads out all the pixels, records them once in the memory 8 or the storage unit 10, and stores them in the memory 8 or the storage unit. Only necessary pixel data may be read out from the unit 10 and processed.

In step S504, the control unit 9 determines the set shooting mode. This process corresponds to an example of a determination unit. If the control unit 9 determines that the set shooting mode is mode 1, the control unit 9 advances the process to step S505.
In step S505, the control unit 9 reads only data of the pixels 201 to 203 having a normal RGB filter. This process corresponds to an example of a reading unit. The control unit 9 records the normal Bayer array Raw data in the memory 8 or the storage unit 10. Next, in step S <b> 506, the control unit 9 performs white balance processing via the image processing unit 5. Next, in step S507, the control unit 9 performs color interpolation via the image processing unit 5. Next, in step S <b> 508, the control unit 9 performs color luminance adjustment via the image processing unit 5. Finally, in step S519, the control unit 9 records the RGB image data subjected to the image processing in the storage unit 10. The processing described above is the same as that of a camera having only a conventional RGB filter.

  In step S504, when the control unit 9 determines that the set shooting mode is mode 2, the process proceeds to step S509. If the subject is a light source with bright lines such as a mercury lamp or a fluorescent lamp, and only the pixels 201 to 203 having normal RGB filters are used, the color resolution is not sufficient with respect to the bright line light source. There is a possibility. In mode 2, only the pixels 204 to 207 (pixels for luminance) having spectral sensitivity for a predetermined luminance are used, and sufficient color reproduction is possible. Therefore, the capacity of image data to be recorded does not increase.

  In step S509, the control unit 9 reads only the data of the bright line pixels 204 to 207. This process corresponds to an example of a reading unit. The control unit 9 records the raw data of only the bright line pixels 204 to 207 in the memory 8 or the storage unit 10. Next, in step S <b> 510, the control unit 9 performs white balance processing via the image processing unit 5. At this time, it is preferable to apply the WB gain around the pixel value of the pixel having the color filter of the characteristic line 406 having a spectral transmittance characteristic close to that of the G pixel and having the sensitivity in the vicinity of 580 nm that most affects luminance information.

  In step S <b> 511, the control unit 9 performs color interpolation via the image processing unit 5. In step S <b> 512, the control unit 9 performs color luminance adjustment via the image processing unit 5. The color luminance adjustment here requires a matrix operation for converting the four colors of the bright line pixels 204 to 207 into three RGB colors, unlike the case of mode 1. This matrix coefficient is prepared in advance in accordance with the set mode. Finally, in step S519, the control unit 9 records the RGB image data subjected to the image processing in the storage unit 10.

In step S504, when the control unit 9 determines that the set shooting mode is mode 3, the control unit 9 advances the process to step S513. Mode 3 is a mode that emphasizes color reproduction.
In step S513, the control unit 9 reads data of all the pixels 201 to 207. This process corresponds to an example of a reading unit. The control unit 9 records the raw data of the pixels 201 to 207 in the memory 8 or the storage unit 10. Next, in step S514, the control unit 9 performs spectral estimation from all seven bands. The control unit 9 uses Wiener estimation or the like as a spectral estimation method. In step S515, the control unit 9 records the spectral image that has been spectrally estimated in the memory 8 or the storage unit 10. Next, in step S <b> 516, the control unit 9 performs white balance processing via the image processing unit 5. Next, in step S517, the control unit 9 performs color interpolation via the image processing unit 5. In step S <b> 518, the control unit 9 performs color luminance adjustment via the image processing unit 5. Finally, in step S519, the control unit 9 creates RGB image data from the spectral image data, and records the created RGB image data in the storage unit 10.

In the above-described operation processing, only the case where the user selects and sets the shooting mode has been described. However, the present invention is not limited to this, and is the multiband camera 100 automatically under a light source having a predetermined bright line? It may be determined whether or not. The process of determining whether or not the light source has a predetermined bright line corresponds to an example of a luminance determination unit.
Next, processing for determining whether or not the light source has a predetermined bright line will be described with reference to the flowchart of FIG.
In step S <b> 601, the control unit 9 shoots a subject via the imaging unit 1 in accordance with a user's shooting instruction. Next, the control unit 9 stores the captured image in the memory 8, specifically, the RAM.

  Next, in step S603, the control unit 9 determines from the image stored in the RAM the integrated value of the pixel value (G bright line) of the pixel for luminance used for light source determination and the pixel value of the pixel having the corresponding RGB filter (G bright line). The difference from the integrated value of G) is calculated. Specifically, the control unit 9 integrates the integration value of the pixel value of the pixel for luminance (the pixel having the color filter of the characteristic line 405) and the pixel value of the R pixel (the pixel having the R filter of the characteristic line 402). Calculate the difference from the value. Here, the range of integration to be calculated may be only the central portion of the image, but it is preferable to be both the central portion and the peripheral portion. Note that if there is an achromatic (gray) region in the image, that region is extracted and compared with the integrated value of that region, the determination accuracy is improved. The control unit 9 compares and determines the difference between the integrated value of the G bright line and the integrated value of G obtained by calculation and a preset threshold value Vth. If the difference between the integral value of the G bright line and the integral value of G is greater than the threshold value Vth, the control unit 9 determines that the captured image is under a light source having a bright line, and proceeds to step S605. On the other hand, when the difference between the integral value of the G bright line and the integral value of G is not larger than the threshold value Vth, the control unit 9 advances the process to step S604.

  In step S605, the control unit 9 determines that the captured image is under a light source having a bright line, and automatically sets the above-described imaging mode to mode 2. In step S604, the control unit 9 determines that it is under a normal light source, and automatically sets the shooting mode to mode 1, which is a normal shooting mode.

  In the case of a multi-band camera having an automatic exposure device, the above-described shooting mode may be determined when metering is performed. Since the control unit 9 sets the shooting mode according to the photometric result, it is not necessary to take a picture once, so reading of pixel data can be omitted. Therefore, particularly in a high-pixel camera, high-speed reading is possible, and there is an advantage that, for example, the number of continuous shots can be increased.

Many digital cameras have an electronic viewfinder (EVF) function.
Here, the electronic viewfinder function is a function for displaying the state of the subject to be photographed in real time on a rear monitor such as a liquid crystal provided on the rear surface of the camera. The electronic viewfinder function is called a live view mode.

  In order to realize the live view mode, the control unit 9 reads out pixel data via the imaging unit 1 at regular time intervals, and then passes through the digital signal processing unit 6 and the correction processing unit 7 to the rear monitor. Display the subject. At this time, if the reading time from the imaging unit 1 and the processing time of the digital signal processing unit 6 are long, the frame rate is affected. However, since the back monitor is focused on confirming the composition of the subject to be photographed by the user, the monitor size is not so large, and the performance of color reproducibility is often inferior to that of the PC monitor. Therefore, when the live view mode is set in the multiband camera, the data of the pixels 204 to 207 for the bright lines are not read, and only the data of the pixels 201 to 203 of the normal RGB filter are read and signal processing is performed on the rear monitor. indicate. Therefore, even when the subject is displayed in the live view mode, it is possible to prevent the frame rate from being compressed.

  As described above, according to this embodiment, it is possible to capture an image with good color reproducibility even under a light source of artificial illumination having a bright line, which is difficult to reproduce with a camera having only a normal RGB filter, and processing of image processing There is no reduction in speed or increase in image capacity.

(Second Embodiment)
In the present embodiment, a multiband camera provided with a color filter having spectral sensitivity in the bright line for astronomical image capturing will be described. Note that the block diagram of the multiband camera according to the present embodiment is the same as that of the first embodiment, and a description thereof will be omitted.

  Here, the Hα ray, which is an important wavelength component in the celestial image as a natural light source, will be described. The Hα ray is the longest wavelength side of the Palmer series that is a line spectrum in the visible to near-ultraviolet region of the line spectrum of hydrogen atoms, and has a wavelength of 656.28 nm. This wavelength is close to a high wavelength among visible light, and can hardly be confirmed with the naked eye. However, some diffuse nebulae emit only this light. By shooting with a color film or special black and white film, invisible light can be confirmed. Furthermore, by observing Hα of sunlight, it is possible to observe phenomena on the chromosphere surface of the sun (flares, prominences, filaments, spicules, etc.) that cannot be seen in normal photography. In this way, the Hα ray is one of the important elements in taking astronomical photographs.

  However, if a normal camera has spectral sensitivity at the wavelength of the Hα ray, shooting a subject having a spectral reflectance from red to near-infrared, such as moths, will cause red covering. Cameras do not have spectral sensitivity for this wavelength range. Therefore, when it is desired to shoot the above-described astronomical image, it is necessary to remove the infrared cut filter or shoot with a dedicated camera, which is difficult to shoot.

Next, the configuration of an example of the image sensor of the multiband camera according to the present embodiment will be described with reference to FIG. FIG. 7 is a diagram illustrating a partial configuration of an image pickup element having a honeycomb structure.
The image sensor has pixels 701 to 703 corresponding to R pixels, G pixels, and B pixels that a normal three-band camera has. Each of the pixels 701 to 703 is provided with a color filter (RGB filter) having the same spectral transmittance as that of a color filter provided in an ordinary three-band camera. In addition, the imaging element has a pixel 704. The pixel 704 has a color filter having spectral sensitivity to Hα rays.

Next, the spectral sensitivity distribution of the color filter provided in the multiband camera will be described with reference to FIG.
Characteristic lines 801 to 803 indicate the spectral distribution of the RGB filter of a normal camera. A characteristic line 801 is a spectral sensitivity distribution of the B filter included in the B pixel 703. A characteristic line 802 is a spectral sensitivity distribution of the G filter included in the G pixel 702. A characteristic line 803 is a spectral sensitivity distribution of the R filter included in the R pixel 701.
A characteristic line 804 is a spectral sensitivity distribution of a color filter having spectral sensitivity to the Hα line of the pixel 704 (Hα line pixel).

Next, the operation processing of the multiband camera will be described with reference to the flowchart shown in FIG. In this embodiment, it is difficult to automatically determine the shooting mode, and the user sets each mode for the multiband camera.
The multiband camera of the present embodiment has three shooting modes. The first mode (mode 1) is a normal photographing mode in which pixel data corresponding to the bright line is not read out, and is the same as in the first embodiment. In addition, since the normal shooting mode can be set, the camera is not limited to astronomical shooting but can also perform normal shooting.

  The second mode (mode 2) is a mode in which a star emitting Hα rays is photographed in red, such as a diffuse nebula (typical examples include the M42 of Orion and the rose nebula of the unicorn constellation). The third mode (mode 3) is a mode that is set when it is desired to acquire only the Hα information as in the case of photographing the phenomenon of the solar chromosphere described above.

First, in step S901, the user selects and sets any one of the above-described shooting modes. The control unit 9 of the multiband camera detects the selected shooting mode.
Next, in step S <b> 902, the control unit 9 actually shoots the subject via the imaging unit 1 in accordance with a user's shooting instruction. At this time, the control unit 9 may read out only necessary pixel data based on the set photographing mode, reads out all the pixels, records them once in the memory 8 or the storage unit 10, and stores them in the memory 8 or the storage unit. Only necessary pixel data may be read out from the unit 10 and processed.

In step S904, the control unit 9 determines the set shooting mode. If the control unit 9 determines that the set shooting mode is mode 1, the control unit 9 advances the process to step S905. Note that mode 1 is the same as in the first embodiment described above, and a description of steps S905 to S908 in the flowchart shown in FIG. 9 is omitted.
In step S904, when the control unit 9 determines that the set shooting mode is mode 2, the process proceeds to step S909. In step S909, the control unit 9 records all the raw data of the pixels 701 to 704 in the memory 8 or the storage unit 10. In step S910, the control unit 9 determines a WB gain for the G pixel 702 via the image processing unit 5 and performs white balance processing. In step S <b> 911, the control unit 9 performs color interpolation processing via the image processing unit 5. In step S912, the control unit 9 performs color adjustment by applying a matrix coefficient prepared in advance so that the pixel value of the Hα line pixel is reflected in an appropriate red color via the image processing unit 5. Finally, in step S916, the control unit 9 records the RGB image data subjected to image processing in the storage unit 10.

In step S904, when the control unit 9 determines that the set shooting mode is mode 3, the process proceeds to step S913.
In step S <b> 913, the control unit 9 reads only the data of the pixel 704 of the Hα line and stores the Raw data in the memory 8 or the storage unit 10. Since color reproduction is unnecessary in mode 3, the control unit 9 performs only brightness adjustment via the image processing unit 5 and records it in the storage unit 10 in step S915.

  As described above, according to the present embodiment, by using a normal RGB filter and a filter having spectral sensitivity with respect to a predetermined luminance, it can be used as a normal camera and, for example, a camera for photographing astronomical images. Can also be used.

  Each means constituting the imaging apparatus and each step of the image processing method of the imaging apparatus in the embodiment of the present invention described above can be realized by operating a program stored in a RAM, a ROM, or the like of the computer. This program and a computer-readable recording medium recording the program are included in the present invention.

  Further, the present invention can be implemented as, for example, a system, apparatus, method, program, or recording medium, and may be applied to an apparatus composed of a single device.

  The present invention supplies a software program for realizing the functions of the above-described embodiments directly or remotely to a system or apparatus. In addition, this includes a case where the system or the computer of the apparatus is also achieved by reading and executing the supplied program code.

  Accordingly, since the functions of the present invention are implemented by computer, the program code installed in the computer also implements the present invention. In other words, the present invention includes a computer program itself for realizing the functional processing of the present invention. In that case, as long as it has the function of a program, it may be in the form of object code, a program executed by an interpreter, script data supplied to the OS, and the like.

  Further, the functions of the above-described embodiments are realized by the computer executing the read program. Furthermore, based on the instructions of the program, an OS or the like running on the computer performs part or all of the actual processing, and the functions of the above-described embodiments can be realized by the processing.

  As another method, a program read from a recording medium is first written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. Then, based on the instructions of the program, the CPU or the like provided in the function expansion board or function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are also realized by the processing.

It is a block diagram of the multiband camera which concerns on this embodiment. It is a figure which shows the arrangement | sequence of the image pick-up element which concerns on 1st Embodiment. It is a figure which shows the other arrangement | sequence of the image pick-up element which concerns on 1st Embodiment. It is a figure which shows the spectral distribution of the color filter which concerns on 1st Embodiment. It is a flowchart which shows the process of the multiband camera which concerns on 1st Embodiment. It is a flowchart which shows the process of the automatic determination of the mode which concerns on 1st Embodiment. It is a figure which shows the arrangement | sequence of the image pick-up element which concerns on 2nd Embodiment. It is a figure which shows the spectral distribution of the color filter which concerns on 2nd Embodiment. It is a flowchart which shows the process of the multiband camera which concerns on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Imaging part 2 Optical system 3 Filter 4 Imaging element 5 Image processing part 6 Digital signal processing part 7 Correction processing part 8 Memory 9 Control part 10 Recording part 11 Communication part 100 Multiband camera

Claims (11)

An imaging apparatus comprising an RGB filter and a color filter having spectral sensitivity with respect to a predetermined bright line,
An image pickup apparatus comprising reading means capable of separately reading pixel data of the RGB filter and pixel data of the color filter.   The imaging apparatus according to claim 1, further comprising a determination unit configured to determine whether the reading unit reads pixel data of the RGB filter or pixel data of the color filter.   The imaging apparatus according to claim 2, wherein the determination unit further determines whether to read out both pixel data of the RGB filter and pixel data of the color filter. Further comprising mode detection means for detecting the selected mode;
The imaging apparatus according to claim 2, wherein the determination unit determines based on a mode detected by the mode detection unit. A luminance determination means for determining whether the light source has a predetermined bright line;
5. The determination unit according to claim 1, wherein the determination unit determines to read out pixel data of the color filter when the luminance determination unit determines that the light source has the predetermined luminance. The imaging device according to any one of the above. Further comprising automatic exposure means;
The imaging apparatus according to claim 2, wherein the determination unit determines in accordance with a result of photometry performed by the automatic exposure unit. It further has an electronic viewfinder function,
The imaging apparatus according to claim 1, wherein the electronic viewfinder function reads out only data of the pixels of the RGB filter by the reading unit and displays the data on a display device.   The imaging device according to claim 1, wherein the color filter has spectral sensitivity with respect to the luminance of at least one artificial light source of a mercury lamp and a sodium lamp.   The imaging apparatus according to claim 1, wherein the color filter has spectral sensitivity with respect to luminance of a natural light source of Hα rays. An image processing method of an imaging apparatus comprising an RGB filter and a color filter having spectral sensitivity with respect to a predetermined bright line,
An image processing method comprising: a reading step capable of separately reading pixel data of the RGB filter and pixel data of the color filter. A program for controlling an imaging apparatus including an RGB filter and a color filter having spectral sensitivity with respect to a predetermined bright line,
A program for causing a computer to execute a reading step capable of separately reading pixel data of the RGB filter and pixel data of the color filter.

Images