JP2010276442A - Multi-band image photographing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the capacity for images to be photographed while preventing color reproducing accuracy from lowering in a multi-band image photographing apparatus. <P>SOLUTION: The multi-band image photographing apparatus 1 detects an illumination light spectrum by using an illumination detecting sensor 11 before a photographing operation. A band choosing section 7 chooses a plurality of bands from multi-band images to be photographed by an image pickup device 3, based on the illumination light spectrum. In the photographing operation, the plurality of bands of images chosen among multi-band images photographed by the image pickup device 3 are stored in a multi-band image memory section 8, and then converted in color into a color image in an image reproducing section 9 and displayed on a display element 10. Therefore, when the number of the plurality of chosen bands is smaller than that of the multi-band images acquired by the image pickup device 3, the capacity for the images to be photographed can be reduced. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a multiband image capturing apparatus and a multiband image capturing method for capturing a multiband image of a subject.

  In an image pickup device, in order to improve color reproducibility, a type that divides a wavelength band by a method such as using four or more types of color filters or using a plurality of optical paths having different spectral characteristics. An imaging method for increasing the number of signals to form a multiband and an apparatus using the imaging method are known (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3).

  However, if the number of bands is increased by multiband, it is possible to improve color reproducibility and enhance reality, but it is necessary for storing captured multiband image data and transmitting / receiving the data. The capacity of storage devices and lines increases. This is particularly remarkable for higher definition of the captured image. For this reason, when the average luminance value is obtained from the RGB values of a plurality of pixels and the luminance value does not exceed a predetermined threshold value, the number of bands of the multiband image is reduced from, for example, 6 bands to 3 bands and output. Devices and methods that can be used are known (see, for example, Patent Document 4).

JP 2002-296114 A JP 2005-260480 A JP 2007-278950 A JP 2009-005008 PR

  However, in the apparatus and method described in Cited Document 4, multiband image data is evaluated, and depending on the evaluation result, the output image data is a multiband including many bands, or a combination of predetermined bands Since it is determined whether or not the image data is to be reduced in number of bands by reducing the number of bands, the signal level for each band is not evaluated. On the other hand, the difference in signal level between bands may become large depending on the illumination characteristics. In such a case, the noise level becomes high in a band where the signal is low, and this causes a decrease in color reproduction accuracy when color conversion is performed. . Therefore, in the apparatus and method described in the cited document 4, there is a concern that the color reproduction accuracy may be lowered when the number of bands is reduced.

  Accordingly, an object of the present invention made by paying attention to these points is to provide a multiband image capturing apparatus capable of reducing the capacity of a captured image while suppressing a decrease in color reproduction accuracy.

The invention of the multiband image pickup device according to claim 1 that achieves the above object,
In a multiband image capturing apparatus including an imaging unit that captures a subject and acquires a multiband image,
Illumination detection means for detecting an illumination light spectrum;
Band selection means for selecting images of a plurality of bands from the multiband image acquired by the imaging means based on the detected illumination light spectrum;
It is characterized by providing.

The invention according to claim 2 is the multiband image pickup device according to claim 1,
Color conversion profile calculation means for calculating a color conversion profile according to a plurality of bands selected by the band selection means;
Color conversion means for converting the captured multiband image using the calculated color conversion profile;
It is characterized by providing.

The invention according to claim 3 is the multiband image pickup apparatus according to claim 1 or 2,
The illumination light detection means is a sensor that measures an illumination light spectrum.

The invention according to claim 4 is the multiband image pickup device according to any one of claims 1-3.
The band selecting unit is configured to determine, for a determination target band set in advance from a plurality of deletion target bands set based on spectral sensitivity characteristics of the imaging unit, an illumination light spectrum of the determination target band. The signal value and the threshold value are compared to determine whether or not to be deleted.If it is determined to be the deletion target, the image of the other band to be deleted together with the image of the band to be determined It is characterized in that images of a plurality of bands removed from the multiband image acquired by the imaging means are selected.

The invention according to claim 5 is the multiband image pickup device according to claim 1 or 2,
The illumination detection means includes illumination estimation means for estimating an illumination light spectrum based on a multiband image obtained from the imaging means.

The invention of a multiband image pickup device according to claim 6 that achieves the above object,
In a multiband image capturing apparatus including an imaging unit that captures a subject and acquires a multiband image,
Band selection means for selecting images of a plurality of bands based on the multiband image acquired by the imaging means is provided.

The invention according to claim 7 is the multiband image pickup device according to claim 6,
The band selection unit is configured to acquire the determination target acquired by the imaging unit with respect to a predetermined determination target band from among a plurality of deletion target bands set based on the spectral sensitivity characteristics of the imaging unit. When the signal value of the band image is compared with the threshold value to determine whether or not the image is to be deleted, and when it is determined to be the deletion target, the other band to be deleted together with the image of the determination target band Are selected from the multiband images obtained by the imaging means, and images of a plurality of bands are selected.

  According to the present invention, since the images of a plurality of bands used by the band selection unit are selected based on the detected illumination light spectrum, the capacity of the captured image is reduced while suppressing a decrease in color reproduction accuracy. be able to.

1 is a block diagram illustrating a schematic configuration of a multiband image capturing device according to a first embodiment of the present invention. It is a flowchart which shows the band selection process of the band selection part of 1st Embodiment. It is a figure which shows the spectral characteristic of the illumination light by an incandescent lamp. It is a figure which shows the spectral sensitivity of a multiband image pick-up device. It is a block diagram which shows schematic structure of the multiband image pick-up device which concerns on 2nd Embodiment of this invention. It is a block diagram which shows schematic structure of the multiband image pick-up device which concerns on 3rd Embodiment of this invention. It is a block diagram which shows schematic structure of the multiband image pick-up device which concerns on 4th Embodiment of this invention. It is a flowchart which shows the band selection process of the band selection part of the multiband image pick-up device concerning a 4th embodiment of the present invention. It is a flowchart which shows the band selection process of the band selection part of the multiband image pick-up device concerning a 5th embodiment of the present invention. It is a flowchart which shows the band selection process of the band selection part of the multiband image pick-up device concerning a 6th embodiment of the present invention. It is a rear view of the multiband image pick-up device concerning a 7th embodiment of the present invention. It is a figure which shows the imaging flow using the multiband image imaging device which concerns on 7th Embodiment of this invention.

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

(First embodiment)
FIG. 1 is a block diagram showing a schematic configuration of a multiband image pickup apparatus according to the first embodiment of the present invention. The multiband image pickup apparatus 1 includes a photographing lens 2, an image pickup element 3, a release button 4, an image pickup control unit 5, a frame memory 6, a band selection unit 7, a multiband image recording unit 8, an image reproduction unit 9, and a display element 10. The illumination detection sensor 11 is included.

  The photographing lens 2 is a lens that forms an image of incident light on the image sensor 3. The image sensor 3 is an element that converts light from a subject into an electrical signal, and includes, for example, a CCD or a CMOS, and has an N-band (N is 16 for example) narrow band filter on the front surface of the exposure surface. A multiband mosaic filter (not shown) is attached. Thereby, the image sensor 3 can capture a multiband image. Here, the imaging means is configured to include the photographing lens 2 and the imaging element 3.

  The imaging control unit 5 controls the imaging device 3 and the illumination detection sensor 11 by operating the release button 4 by the user. That is, when the release button 4 is half-pressed by the user, the imaging control unit 5 drives an AE (automatic exposure) operation and controls the detection sensor 11 to measure the illumination light spectrum. When the release button 4 is pressed, the imaging control unit 5 controls the imaging device 3 to write multiband image data in the frame memory 6. The frame memory 6 can store image data for one frame of the image sensor 3.

  The illumination detection sensor 11 is a sensor that measures spectrum data of illumination light for each band corresponding to the imaging band of the image sensor 3, and constitutes illumination detection means. The illumination detection sensor 11 is disposed on the front surface of the main body of the multiband image capturing apparatus 1, detects the illumination light spectrum intensity for each band from the subject side, and outputs it to the band selection unit 7 as illumination light spectrum data. To do.

  The band selection unit 7 constitutes a band selection unit, calculates an illumination light signal value for each band from the illumination light spectrum data measured by the illumination detection sensor 11, and selects a band that uses image data accordingly. Further, the band selection unit 7 receives the multiband image data temporarily stored in the frame memory 6 and outputs the image data of the selected band to the multiband image recording unit 8.

  The multiband image recording unit 8 constitutes a multiband image recording unit and is configured to record the image data of the band selected by the band selection unit 7. The image reproducing unit 9 is configured to receive multiband image data from the multiband image recording unit 8, color-convert this image data into a desired color space (for example, RGB), and reproduce the image data. The display element 10 is a liquid crystal display provided on the back side of the multiband image capturing apparatus 1, receives image data reproduced by the image reproducing unit 9, and displays the image data on the display. The display element 10 may be an organic EL display or other display elements.

  With the above-described configuration, when the multiband image capturing apparatus 1 captures an image, first, when the release button 4 is half-pressed by the user, the sensor 11 detects the illumination light spectrum under the control of the image capturing control unit 5. Using this, the band selection unit 7 selects a band for recording image data.

  FIG. 2 is a flowchart showing band selection processing by the band selection unit 7. As shown in this figure, the band selection unit 7 receives illumination light spectrum data input from the illumination detection sensor 11 (step S101), and reads camera sensitivity stored in a storage unit not shown (step S102). The illumination light spectrum data is corrected using the camera sensitivity data for each band to calculate the illumination light signal value gk (k = 1,..., N) (step S103). Next, the maximum value of the calculated illumination light signal value gk is set to gmax (step S104), and the relative value g′k (k = 1) of the illumination light signal value of the first band is set to gk (k = 1). Calculated as a ratio to gmax (step S106). If g′k (k = 1) is smaller than a predetermined threshold (for example, 0.1) (step S107), the image of the kth band is excluded, and if not smaller, it is selected (step S108). ). Similarly, the same determination is sequentially repeated for each band (steps S106 to S110), and when it is determined whether or not to select all band images (step S109), the band selecting unit 7 selects the selected band. Is stored (step S111).

  Next, when the release button 4 is pressed by the user, the image pickup device 3 takes in the multiband image data imaged on the exposure surface into the frame memory 6 under the control of the control means 5, and then the band selection unit. 7 is output. The band selection unit outputs the image data of the selected band stored in step S111 described above to the multiband image recording unit 8, and the multiband image recording unit 8 records this image data. Thereafter, the image data stored in the multiband image recording unit 8 is subjected to color conversion processing by the image reproduction unit 9 and displayed as a color image on the display element 10.

  For example, when imaging is performed under an incandescent lamp having spectral characteristics as shown in FIG. 3 and the spectral sensitivity of the multiband image pickup apparatus 1 is FIG. 4, the signal levels in the vicinity of short-wave bands 1 and 2 are shown. Is extremely low compared to band N, and it can be predicted that the S / N is poor. Therefore, in the present invention, images of bands other than these short-wavelength bands 1 and 2 are selected as multiband images, and image data of a band having a poor S / N is not used. Reduce the amount of data recorded. In this case, the image data of the band that is not used has a poor S / N ratio and leads to deterioration of the image quality when color conversion is performed, so that deterioration of the image quality after conversion can also be suppressed.

  As described above, according to the present embodiment, based on the detected illumination light spectrum, the band selection unit excludes an image of a band with a small relative value of the illumination signal value and a poor S / N, Since images of a plurality of other bands are selected, it is possible to reduce the capacity of the captured image while suppressing a decrease in color reproduction accuracy.

(Second Embodiment)
FIG. 5 is a block diagram showing a schematic configuration of a multiband image pickup apparatus according to the second embodiment of the present invention. In this embodiment, in the multiband image capturing apparatus according to the first embodiment, in parallel with the path for transmitting the image of the selected band between the band selection unit 7 and the multiband image recording unit 8, A color conversion profile calculation unit 21 and a color conversion unit 22 are provided.

  The color conversion profile calculation unit 21 constitutes a color conversion profile calculation unit and calculates a color conversion profile according to the band selection in the band selection unit 7, and the color conversion unit 22 constitutes a color conversion unit and calculates Using the color conversion profile thus formed, the multiband image excluding the band excluded by the band selection unit 7 is subjected to color conversion into a desired color space. The multiband image recording unit 8 can record both the multiband image output from the band selection unit 7 and the color image color-converted by the color conversion unit 22.

  Since other configurations and operations are the same as those of the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

  As described above, according to the present embodiment, a color conversion profile corresponding to a multiband image from which a band leading to deterioration in image quality is deleted is created, and color conversion is performed to convert from the original multiband image. Therefore, it is possible to generate and record a color image in which deterioration in image quality is suppressed.

(Third embodiment)
FIG. 6 is a block diagram showing a schematic configuration of a multiband image pickup apparatus according to the third embodiment of the present invention. In this embodiment, the illumination detection sensor 11 is not provided in the multiband image capturing apparatus according to the first embodiment, and the frame memory 6 and the band selection unit 7 are connected to the band selection unit 7 between the frame memory 6 and the band selection unit 7. The illumination light estimation unit 31 is provided in parallel with the direct multiband image output path. The illumination light estimation unit 31 estimates illumination light spectrum data based on the multiband image data captured by the image sensor 3 output from the frame memory 6 and outputs the estimated data to the band selection unit 7. The band selection unit 7 selects a band based on the estimated illumination light spectrum data as in the first embodiment.

  Here, the illumination light estimation unit performs estimation by a process similar to auto white balance performed by a general digital camera as simple estimation. In other words, for the white signal value, the signal value ratio is calculated between the bands corresponding to the bands of the multiband image, and the pre-calculated signal value ratio between the bands and the illumination type table are referred to. Then, the illumination type is determined, and a spectrum corresponding to the illumination is output. Since other configurations and operations are the same as those of the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

  As described above, according to this embodiment, since the illumination light spectrum is estimated by providing the illumination light estimation unit, the same effect as that of the first embodiment can be obtained without using an illumination detection sensor. be able to.

(Fourth embodiment)
FIG. 7 is a block diagram showing a schematic configuration of a multiband image pickup apparatus according to the fourth embodiment of the present invention. This embodiment is obtained by removing the illumination light estimation unit 31 from the third embodiment shown in FIG. 6, and selects images of a plurality of bands based on the multiband image acquired by the image sensor 3. Is to do.

  FIG. 8 shows a flowchart of the band selection process of the band selection unit 7 according to the present embodiment. The band selection unit 7 receives a multi-band captured image acquired by the image sensor via the frame memory 6 in the AE operation (step S201). The band selection unit 7 calculates an average signal value for each band, for example, a pixel value per unit area (step S202). Next, for the first band (step S203), the average signal value is compared with a predetermined threshold value (step S204). If the average signal value is smaller than the threshold value, this band is excluded, and if not smaller, the average signal value is selected (step S204). Step S205). Similarly, the same processing is sequentially performed for each band (steps S204 to S207), and when the processing for all the bands is completed (step S206), only the selected band is stored (step S208).

  Thereafter, during the release operation, the band selection unit 7 outputs only the image of the selected band stored in step S208 among the multiband images input from the frame memory 6 to the multiband image recording unit 8. Since other configurations and operations are the same as those of the third embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

  As described above, in this embodiment, a band with a poor S / N is obtained when a subject with a biased spectral characteristic occupies most of the screen without providing an illumination detection sensor or illumination estimation unit. This can be eliminated, and a reduction in the color reproduction accuracy of the subject can be suppressed.

(Fifth embodiment)
The multiband image pickup apparatus according to the fifth embodiment of the present invention is obtained by changing the band selection method by the band selection unit 7 of the multiband image pickup apparatus in the fourth embodiment. In the present embodiment, a plurality of deletion candidate bands are determined in advance, and a determination target band is determined from the deletion candidate bands. The deletion candidate band is a band that is highly likely to have a poor S / N due to the spectral sensitivity characteristics of the camera. When the S / N of the determination target band image is poor, the S / N of the other deletion candidate band images Since N is also likely to deteriorate, a band other than the deletion candidate is selected.

  Therefore, in the present embodiment, the band selection unit 7 determines band selection based on the flowchart of FIG. 9 instead of the flowchart of FIG. First, a multi-band captured image acquired by the image sensor via the frame memory 6 is input to the band selection unit 7 (step S301). Next, the band selection unit 7 calculates an average signal value for each band, that is, a pixel value per unit area (step S302). Thereafter, data for deletion candidate determination including the identifiers of the deletion target and the determination target band is read from a storage unit (not shown) (step S303). Here, for example, the deletion target bands are k1 and k2, and among these, the determination target band is k1.

  The band selection unit 7 sets the band k1 as a determination target (step S304), and if the average signal value gk1 of the band k1 is smaller than a predetermined threshold (step S305), in addition to the determination target band k1, the band k2 as a deletion candidate is selected. The selected band is excluded (step S306), and the remaining band is stored as an image of the selected band (step S307). When the average signal value gk1 of the band k1 is not smaller than the threshold value, the images of any of the bands k1 and k2 are selected without being deleted. Since other configurations and operations are the same as those of the third embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

  Thus, in this embodiment, the average signal value for each band obtained from the multiband captured image acquired for each predetermined band to be determined is compared with the threshold value to determine whether or not to delete. In addition, since the image of another preset deletion candidate band is deleted according to the determination result, the processing load of the band selection unit 7 can be reduced and the processing speed can be improved. Further, by appropriately selecting a plurality of bands to be deleted, it is possible to prevent a sensitivity bias from occurring due to deletion of a specific band.

  A plurality of combinations of deletion candidate bands and determination target bands may be provided. In that case, the processing in steps S304 to S306 in FIG. 9 is sequentially repeated for a plurality of determination target bands, and the bands that are not excluded in step S306 corresponding to all the determination target bands are selected. And

(Sixth embodiment)
The multiband image capturing device according to the sixth embodiment of the present invention uses the illumination detection sensor to perform a determination method similar to the determination method performed on the multiband captured image in the band selection unit according to the fifth embodiment. This is applied to the acquired illumination light spectrum. For this reason, the configuration of the multiband image pickup apparatus of the present embodiment is the same as that of the multiband image pickup apparatus 1 according to the first embodiment shown in FIG. The processing in the band selecting unit 7 is shown in the flowchart of FIG.

  The band selection unit 7 receives the illumination light spectrum data from the illumination detection sensor 11 (step S401), reads the camera sensitivity stored in the storage unit (not shown) (step S402), The illumination light signal value gk (k = 1,..., N) is calculated by correction using the camera sensitivity data for each band (step S403). Thereafter, the deletion candidate determination data including the deletion target and the determination target band identifier is read from a storage unit (not shown) (step S404). Here, as in the fifth embodiment, the bands to be deleted are k1 and k2, and of these, the band to be determined is k1. The band selection unit 7 sets the band k1 as a determination target (step S405), and if the illumination light signal value gk1 of the band k1 is smaller than a predetermined threshold (step S406), in addition to the determination target band k1, the deletion candidate band k2 Are excluded from the band to be selected (step S407), and the remaining bands are output as the selected band (step S408). When the illumination light signal value gk1 of the band k1 is not smaller than the threshold value, neither of the bands k1 and k2 is selected without being deleted. Since other configurations and operations are the same as those of the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

  As described above, in the present embodiment, the same effects as in the fifth embodiment can be obtained while using the illumination light spectrum data acquired by the illumination detection sensor 10. Similarly to the fifth embodiment, a plurality of combinations of deletion candidate bands and determination target bands may be provided.

(Seventh embodiment)
FIG. 11 is a rear view of the multiband image pickup apparatus according to the seventh embodiment of the present invention. The display element 10 has a selection screen for selecting a measurement mode of the illumination light spectrum by the illumination detection sensor 11. It is displayed. In the first embodiment, the timing for measuring the illumination light by the illumination detection sensor 11 in the first embodiment can be selected other than when the release button is half-pressed (that is, AE synchronization). As shown in the figure, the multiband image pickup apparatus 1 is provided with a finder 41, a lighting lamp 42, and an illumination measurement button 43 in addition to the image pickup element 10 and the release button 4 which have already been described.

  The multiband image capturing operation according to the mode setting operation of the present embodiment will be described below using the flowchart of FIG.

  The measurement mode selection screen is configured such that the user selects from the menu selection screen of the multiband image capturing apparatus 1. On the selection screen displayed on the display element 9, four options of "1. AE synchronization", "2. Release synchronization", "3. Measurement button", and "4. Preset" are shown. The user selects and sets one mode from these selections (step S501). When the user sets a mode, the multiband image capturing apparatus 1 executes processing for each mode corresponding to the four options (step S502).

  The operation of the multiband image capturing apparatus 1 when the mode is set to “1. AE synchronization” is the same as that described in the first embodiment. That is, when the user presses the release button halfway, the multiband image capturing apparatus 1 performs an AE operation (step S511). At the same time, the illumination detection sensor 11 detects the illumination light spectrum (step S512), and a band used for the subsequent image processing is selected by the band selection unit 7 based on the detected spectrum data. After that, when the release button is pressed (step S513), multi-band image data is imaged by the image sensor 3 (step S514), and the image of the band selected by the band selection unit 7 is transmitted through the frame memory 6. Output to the multiband image recording unit 8 and record.

  Next, when the mode is selected for “2. Release synchronization”, the illumination light spectrum is not detected during the AE operation (step S521), and first, in conjunction with the pressing of the release during imaging (step S522). The illumination detection sensor 10 measures the illumination light spectrum (step S523), and then captures multiband image data (step S524). Other operations are the same as in the case of AE synchronization.

  When the mode is selected in “3. Measurement button”, the illumination measurement button 43 is enabled (step S531), and when this button is operated by the user (step S532), the illumination detection sensor 10 is illuminated. Measure the optical spectrum. Thereafter, during the AE operation (step S534), the illumination light spectrum is not measured, and multiband image data is captured (step S534) when the user presses the release button. Other operations are the same as in the case of AE synchronization. In this mode, like the one-touch white balance, the illumination light spectrum is measured and stored in advance, the data is used every time, and measurement is not performed for each imaging or for each AE. For example, this mode is particularly effective when, for example, it is necessary to image a subject in the shade from the shade, and after the illumination light spectrum is once measured in the shade, the subject is imaged from a desired shaded location.

  Further, when the mode is selected as “4. Preset”, preset data determined in advance according to the sunshine condition or the like is set as illumination light spectrum data (step S541). The following AE operation (step S542), release operation (step 543), and imaging (step S544) are the same as when “3. Measurement button” is selected. It is also possible to enable the measurement button 43, perform measurement by the illumination detection sensor 11 when the button is pressed, store the measurement result data, and use it as preset data.

  As the mode setting described above, normally, for example, “1. AE synchronization” is set as a default value. For example, when the F value and the exposure time are set manually, for example, “2” .. "Release synchronization" may be set to a default value. The display element 10 may display which mode is set. Further, when measuring the illumination light spectrum, in order to notify that the measurement is being performed, a display notifying that the measurement is being performed may be displayed on the display element 10, or the lighting lamp 42 may be turned on or blinked.

  In the present embodiment, the mode selection means shown in FIG. 14 is applied to the first embodiment, but can also be applied to the second and sixth embodiments. Also in the third embodiment that does not use the illumination detector 10, the timing and method of the estimation of the illumination light spectrum by the illumination light estimator 31 are selected according to the above modes, so that the fourth embodiment It can also be applied to forms.

  In addition, this invention is not limited only to the said embodiment, Many deformation | transformation or a change is possible. For example, in each embodiment, the multiband image capturing apparatus includes an image reproducing unit and a display element. However, these may not be included in the multiband image capturing apparatus, and may be realized by separate devices. good. In the fourth and fifth embodiments, the band selection is performed during the AE operation and the multiband image of the band selected during the release operation is captured. However, the same multi-image captured during the release operation is captured. Using band images, band selection and imaging of the selected multiband image may be performed.

DESCRIPTION OF SYMBOLS 1 Multiband image pick-up device 2 Shooting lens 3 Image pick-up element 4 Release button 5 Image pick-up control part 6 Frame memory 7 Band selection part 8 Multiband image recording part 9 Image reproduction part 10 Display element 11 Illumination detection sensor 21 Color conversion profile calculation part 22 Color modulation part 31 Illumination light estimation part 41 Finder 42 Illuminating lamp 43 Illumination measurement button

Claims (7)

In a multiband image capturing apparatus including an imaging unit that captures a subject and acquires a multiband image,
Illumination detection means for detecting an illumination light spectrum;
Band selection means for selecting images of a plurality of bands from the multiband image acquired by the imaging means based on the detected illumination light spectrum;
A multiband image capturing apparatus comprising: Color conversion profile calculation means for calculating a color conversion profile according to a plurality of bands selected by the band selection means;
Color conversion means for converting the captured multiband image using the calculated color conversion profile;
The multiband image capturing apparatus according to claim 1, further comprising:   The multiband image capturing apparatus according to claim 1, wherein the illumination light detection unit is a sensor that measures an illumination light spectrum.   The band selecting unit is configured to determine, for a determination target band set in advance from a plurality of deletion target bands set based on spectral sensitivity characteristics of the imaging unit, an illumination light spectrum of the determination target band. The signal value and the threshold value are compared to determine whether or not to be deleted.If it is determined to be the deletion target, the image of the other band to be deleted together with the image of the band to be determined The multiband image capturing apparatus according to claim 1, wherein images of a plurality of bands excluded from the multiband image acquired by the imaging unit are selected.   The multiband image imaging apparatus according to claim 1, wherein the illumination detection unit includes an illumination estimation unit that estimates an illumination light spectrum based on a multiband image obtained from the imaging unit. In a multiband image capturing apparatus including an imaging unit that captures a subject and acquires a multiband image,
A multiband image imaging apparatus comprising: band selection means for selecting images of a plurality of bands based on the multiband image acquired by the imaging means.   The band selection unit is configured to acquire the determination target acquired by the imaging unit with respect to a predetermined determination target band from among a plurality of deletion target bands set based on the spectral sensitivity characteristics of the imaging unit. When the signal value of the band image is compared with the threshold value to determine whether or not the image is to be deleted, and when it is determined to be the deletion target, the other band to be deleted together with the image of the determination target band The multiband image capturing apparatus according to claim 6, wherein images of a plurality of bands are selected by removing the image of the image from the multiband image acquired by the imaging unit.

Images