JP5210121B2 - Imaging apparatus and control method thereof - Google Patents

Description

  The present invention relates to an imaging apparatus and a control method thereof, and more particularly to an imaging apparatus that captures a chart having a plurality of color patches and obtains a color patch signal for creating a color profile, and a control method thereof.

  In general digital cameras, color conversion processing is performed so that the reproduced color in the captured image data is a color that is faithful to the color of the subject or a preferable color such as a preferable color for the observer. Yes. However, the color of the subject varies greatly depending on the light source that illuminates the subject. Therefore, even if the color conversion processing is set to obtain an optimum color reproduction under a certain light source, the optimum reproduction color is not necessarily obtained when applied to image data photographed under a different light source.

  Therefore, in the digital camera, white balance adjustment is performed as a pre-process of the color conversion process. However, color information such as R, G, and B output from the sensor of the digital camera does not necessarily correspond to the tristimulus values perceived by humans. This is because the spectral sensitivities of the R, G, and B pixels in the digital camera do not match the color matching function. If this spectral sensitivity matches the color matching function, an optimal color reproduction can be obtained by one optimal color conversion process under any light source, as long as the white balance is appropriately adjusted. Is possible. However, since the spectral sensitivity is actually different from the color matching function, it is necessary to perform different color reproduction processing depending on the light source in order to perform more accurate color conversion processing.

In order to perform different color reproduction processing depending on the light source, it is necessary to prepare a color profile such as a lookup table for performing color conversion for each light source. As a method for creating this color profile, a method is known in which a chart made up of a plurality of color patches prepared in advance is photographed and created based on photographing data of each color patch (see, for example, Patent Document 1). ).
JP 2004-153684 A

  The conventional color profile creation method is based on the premise that the color patch has been photographed accurately. Therefore, when the color patch is not photographed correctly, for example, the following problems occur, and the accuracy of the created color profile is deteriorated, or the creation itself is impossible.

  -The chart is shot at an angle, making it difficult to extract color patch data.

  -The angle of view at the time of shooting is not appropriate, and it is affected by a drop in the amount of light around the lens and aberration.

  ・ There is a lot of noise on the data due to underexposure.

  -Data of peripheral colors other than the patch are mixed into the patch data due to poor focus (out of focus).

  ・ The lighting on the chart is not appropriate and is affected by uneven lighting.

  ・ Shooting under backlit conditions may cause lens flare and ghosting.

  In general, since a color profile is often created on a personal computer (PC), it is rarely created at a chart shooting site. Therefore, it is often not noticed that the photographing has failed at the stage where the chart is photographed, and at the stage of creating the color profile, the failure is often noticed. In such a case, it is necessary to go to the shooting site again and take a picture. In particular, when shooting a subject and a chart outdoors, it is almost impossible to reproduce the shooting environment at a later date, so if chart shooting fails, an optimal color profile for the shot image of the subject will be obtained. It will be impossible to create. In the first place, it is not easy for a user with little chart photography experience to accurately perform chart photography.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an imaging apparatus and a control method for the imaging apparatus that can easily perform chart photography for the purpose of creating a color profile. To do.

  As a means for achieving the above object, an imaging apparatus of the present invention comprises the following arrangement.

That is, a distance measuring means for measuring the finder display means for displaying within the display subject, the plurality of distances between the subject corresponding to the plurality of locations within the display range of the finder display means, said within the display range obtaining means for obtaining the size of the subject, said the maximum of the difference thus calculated from the measured plurality of distances to the ranging means, and have size and based Dzu of the object obtained by the obtaining means, color profiles and determine the constant means the subject as charts having a plurality of color patches can be generated is you determine whether it can shoot, determination previous SL-size constant means that it is possible photographing the subject as the chart when a Kagete stage taking for photographing the subject as the chart, when said object is determined before SL-size constant means If it is not captured as the chart , Characterized by having a a notification means for providing notification that the subject is captured not as the chart.

  According to the imaging apparatus of the present invention having the above-described configuration, it is possible to easily perform chart photography for the purpose of creating a color profile.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the accompanying drawings. The configurations shown in the following embodiments are merely examples, and the present invention is not limited to the illustrated configurations.

<First Embodiment>
Apparatus Configuration In this embodiment, an example in which a digital single-lens reflex camera is applied as an imaging apparatus that captures a chart having a plurality of color patches and obtains a color patch signal for creating a color profile is shown. FIG. 1 is a block diagram showing the configuration of the digital single-lens reflex camera of this embodiment. In FIG. 1, 100 is a camera body, and 200 is a replaceable lens unit.

  First, the configuration of the lens unit 200 will be described. Reference numerals 201 to 203 denote lens elements. Reference numeral 201 denotes a focusing lens group that adjusts the focus position of the shooting screen by moving back and forth on the optical axis. Reference numeral 202 denotes a variable power lens group that changes the focal length of the lens unit 200 by moving back and forth on the optical axis to change the magnification of the photographing screen. Reference numeral 203 denotes a fixed lens for improving lens performance such as telecentricity. Reference numeral 204 denotes an aperture. Reference numeral 205 denotes a ranging encoder that reads the position of the focusing lens group 201 and generates a signal corresponding to the subject distance. A lens control unit 206 changes the aperture diameter of the diaphragm 204 based on a signal sent from the camera body 100 and controls the focusing lens group 201 to move based on a signal sent from the distance measuring encoder 205. . The lens control unit 206 also provides the camera body 100 with lens information including the subject distance generated by the ranging encoder 205, the focal length based on the positional information of the variable magnification lens group 202, the F number based on the aperture diameter of the stop 204, and the like. Send. A mount contact group 207 serves as a communication interface between the lens unit 200 and the camera body 100.

  Next, the configuration of the camera body 100 will be described. Reference numeral 101 denotes a main mirror, which is obliquely installed in the photographing optical path in the finder observation state and retracts out of the photographing optical path in the photographing state. The main mirror 101 is a half mirror, and when it is obliquely arranged in the photographing optical path, it transmits about half of the light beam from the subject to the distance measuring sensor 103 described later. Reference numeral 104 denotes a finder screen disposed on the planned imaging plane of the lens elements 201 to 203, and the photographer observes the finder screen 104 through the eyepiece 107 to confirm the photographing screen. Here, reference numeral 106 denotes a pentaprism, which changes an optical path for guiding a light beam from the finder screen 104 to the eyepiece 107. Reference numeral 105 denotes a finder display element composed of a transmissive liquid crystal element. For example, a screen on which a photographer observes photographing information such as a frame, a shutter speed, an aperture value, and an exposure correction amount as shown in FIG. Display inside. Details of the display frame shown in FIG. 4 will be described later.

  Reference numeral 103 denotes a distance measuring sensor that takes in a light beam from the lens unit 200 via a sub-mirror 102 that can be retracted behind the main mirror 101. The distance measuring sensor 103 sends the state of the captured light flux to the camera control unit 111, and the camera control unit 111 determines the focus state of the lens unit 200 with respect to the subject based on the state. Subsequently, the camera control unit 111 calculates the operation direction and the operation amount of the focusing lens group 201 based on the determined focus state and the position information of the focusing lens group 201 sent from the lens control unit 206.

  A photometric sensor 108 generates a brightness or luminance signal in a predetermined area on the screen displayed on the finder screen 104 and transmits the signal to the camera control unit 111. The camera control unit 111 determines an appropriate exposure amount for the image sensor 110 based on the signal value transmitted from the photometric sensor 108, that is, the photometric result.

  The camera control unit 111 further controls the aperture diameter of the diaphragm 204 and the shutter speed of the shutter 109 so that the appropriate exposure amount is obtained according to the shooting mode selected by the shooting mode switching unit 114. Here, the appropriate exposure amount is stored in advance in the camera control unit 111 as, for example, an output value of the imaging sensor 110 when a gray subject having a reflectance of 18% is captured. When the photographing mode is the shutter speed priority mode, the camera control unit 111 calculates the aperture diameter of the diaphragm 204 so as to obtain the appropriate exposure amount with respect to the shutter speed set by the parameter setting change unit 115. To do. Based on the calculated value, the camera control unit 111 sends a command to the lens control unit 206 to adjust the aperture diameter of the diaphragm 204. Similarly, when the photographing mode is the aperture priority mode, the shutter time is calculated so as to obtain the appropriate exposure amount for the set aperture value. Further, in the program mode, the camera control unit 111 determines the shutter speed and the aperture value according to the combination of the shutter speed and the aperture value that are determined in advance for the appropriate exposure amount.

  The above process is started by half-pressing the shutter switch 113. At this time, the lens control unit 206 sets the focusing lens group 201 determined by the camera control unit 111 as a target until the position information indicated by the ranging encoder 205 matches the target movement amount. 201 is driven.

  Next, when the shutter switch 113 is fully pressed, the photographing sequence is started. At the start of the photographing sequence, first, the main mirror 101 and the sub mirror 102 are folded and retracted out of the photographing light exposure. Subsequently, the lens control unit 206 narrows down the diaphragm 204 in accordance with the value calculated by the camera control unit 111. Subsequently, the shutter 109 is opened and closed according to the shutter speed calculated by the camera control unit 111. Thereafter, the diaphragm 204 is opened, and then the main mirror 101 and the sub mirror 102 return to their original positions.

  Reference numeral 110 denotes an image sensor, which transfers the luminance signal of each pixel accumulated while the shutter 109 is opened to the camera control unit 111. In the image sensor 110, color filters composed of three colors of R, G, and B are arranged in a Bayer array, and the camera control unit 111 detects from the luminance signals corresponding to the positions of these R, G, and B filters. , R, G, B color image signals consisting of three channels are formed. In the case of the normal shooting mode, color conversion is performed using a color profile stored in advance in the camera control unit 111, mapping to an appropriate color space, and an image file of an appropriate format is created. That is, the color profile used here is created by, for example, an external PC based on a plurality of color patch signals in the chart photographed in the present embodiment. In the case of the chart photographing mode, a file of an appropriate format is created without performing color conversion using a color profile and mapping to a color space.

  Reference numeral 116 denotes a display unit provided on the back surface of the camera 100. The display unit 116 displays the setting status based on the settings by the shooting mode switching unit 114 and the parameter setting change unit 115, and is a thumbnail created by the camera control unit 111 after shooting. Display an image.

  Reference numeral 112 denotes a removable memory card recording / reproducing unit that records an image file created by the camera control unit 111 after shooting on a loaded memory card.

  2A and 2B are a top view and a rear view of the digital single-lens reflex camera of the present embodiment. 2A and 2B, the same reference numerals are given to the same components as those in FIG. That is, 107 is a finder eyepiece, 113 is a shutter switch, 114 is a photographing mode switching unit, 115 is a parameter setting changing unit, and 116 is a display unit.

  The parameter setting changing unit 115 has a switching button 117 for switching the display content of the display unit 116. Furthermore, selection buttons 118a (upward), 118b (downward), 118c (rightward), and 118d (leftward) for moving the selected portion in the vertical and horizontal directions on the display unit 116 are provided. Furthermore, an OK button 119 for determining selection is provided.

  FIG. 3 is an external view showing details of the shooting mode switching unit 114. In FIG. 3, 301 is a mode setting dial, and 302 is a setting index of the mode setting dial 301. On the mode setting dial 301, 301a is a setting position for camera power off, 301b is a program mode, 301c is a shutter priority mode, and 301d is an aperture priority mode. Details of these photographing modes are as described above. 301e is a manual mode setting position where the photographer can freely select the shutter speed and aperture, and 301f is a chart shooting mode setting position.

In-Finder Display FIG. 4 is a diagram showing the in-finder display by the finder display element 105. In FIG. 4, reference numeral 400 denotes a viewfinder visual field range. In the viewfinder visual field range 400, 401 is a chart photographing frame displayed as a chart position index when the chart photographing mode is selected. The user determines the angle of view so that the chart to be imaged matches the chart imaging frame 401 in the chart imaging mode. The imaging magnification of the chart at this time is preferably about ¼ of the viewfinder visual field area in order to avoid the influence of the peripheral light reduction of the lens, but is not limited to this. Reference numeral 402 denotes a photometric area. In the chart imaging mode, spot photometry is performed in the photometric area 402 to determine the optimum exposure amount to the image sensor 110 for imaging the chart.

  Reference numerals 403 to 406 are autofocus indexes serving as ranging points in the present embodiment, which are provided so as to overlap the chart imaging frame 401. In the present embodiment, it is determined whether or not the chart is placed at an appropriate position by calculating the difference in the distance of the subject in each index based on the difference in defocus amounts in the autofocus indices 403 to 406. Reference numeral 407 denotes a determination result display unit for displaying a determination result as to whether or not the chart can be properly photographed in the chart photographing mode. In the present embodiment, “OK” is displayed on the determination result display unit 407 when it is determined that the chart can be appropriately captured, and “NG” is displayed when it is determined that the chart cannot be appropriately captured. Needless to say, the display of the determination result is not limited to this, and any display can be used as long as it can be understood by the user.

Chart Shooting Process FIG. 5 is a flowchart showing a shooting process in the chart shooting mode controlled by the camera control unit 111. When the mode setting dial 301 is set to the chart photographing mode position 301f, the present algorithm starts when the user presses the shutter switch 113 halfway.

  First, in step S101, an exposure determination process (AE process) and an autofocus process (AF process) are performed. In the exposure determination process, for example, as in the aperture priority mode described above, the shutter time for obtaining the appropriate exposure amount described above is calculated for a preset aperture value. That is, the shutter time is determined so that the output of the image sensor 110 becomes a preset value assuming that the average luminance in the photometric area 402 of FIG. 4 measured by the photometric sensor 108 corresponds to a subject with a reflectance of 18%. To do. In the autofocus process in step S101, as already described in the description of the distance measuring sensor 103, the focusing lens group 201 is driven so that any one of the autofocus indices 403 to 406 is in focus.

  Next, in step S102, the shutter time determined in step S101 is corrected according to the type of chart to be photographed. Specifically, in the case of a chart in which the average reflectance of patches located near the photometric area 402 is brighter than 18%, the chart is changed to be brighter (the shutter time is long). On the contrary, in the case of a chart in which the average reflectance of the patch corresponding to the vicinity of the photometric area 402 is darker than 18%, the chart is changed to be darker (shutter time is short). These correction amounts are stored in advance in the camera control unit 111 according to the type of chart to be photographed. Further, as a method for specifying the type of chart, for example, it is assumed that the user selects and instructs at the time of shooting. As described above, it is possible to obtain a more appropriate chart image by appropriately correcting the exposure according to the type of the chart. That is, it is possible to improve the accuracy of a color profile created using a plurality of color patch information in the chart image.

  In step S103, the subject distance d generated by the ranging encoder 205, the focal length f based on the positional information of the variable magnification lens group 202, and the F number based on the aperture diameter of the diaphragm 204 are acquired from the lens control unit 206, and these are obtained. A depth of field o is calculated based on the information. The depth of field o can be calculated by, for example, the following formulas (1) to (3), but is not limited to this.

  However, in the formula (1), σ represents the diameter of the allowable circle of confusion and corresponds to the size of one pixel in the image sensor 110.

  In step S104, the subject size h is calculated. Here, the subject size h means the size of the chart to be photographed. The subject size h is referred to in a determination step S106 at a later stage, and when the subject size h is different from the chart size assumed in advance, it is determined that the subject is not a chart.

  If the length on the image sensor 110 corresponding to the length of one side of the chart imaging frame 401 in FIG. 4 is k, the subject size h is calculated by the following equation, for example.

  In step S105, the maximum distance measurement distance difference ΔL is calculated for each of the autofocus indices 403 to 406 (hereinafter simply referred to as indices) in FIG. Here, first, the subject distance at the position of each index 403 to 406 is estimated from the output value of the distance measuring sensor 103 corresponding to the position of the index 403 to 406, and then the maximum value and the minimum value at these subject distances. Is taken as ΔL.

  Step S106 is a shooting determination step. Based on the above-mentioned maximum distance measurement difference ΔL, depth of field o, subject size h, subject distance d, whether or not the subject is a chart or the position of the chart is appropriate. Whether or not shooting is possible is determined based on whether or not it is. That is, first, when the subject size h is larger than the preset threshold value Tm1 and smaller than Tm2, the subject size is different from the assumed chart size, so it is determined that the subject is not a chart and a False flag is set. . If the maximum distance measurement difference ΔL is larger than the depth of field o, a false flag is set because an in-focus image cannot be acquired on the entire surface of the chart. Further, if the maximum distance measurement distance difference ΔL is larger than a preset threshold TL, it is assumed that the chart as the subject is deviated from the position of the chart imaging frame 401, and therefore a False flag is set.

  If the False flag is set, the process proceeds to step S108, "NG" is displayed on the determination result display unit 407, the user is informed that photographing is impossible, and the process is terminated. On the other hand, if the True flag is set in the determination step S106, “OK” is displayed on the determination result display unit 407 to notify the user that shooting is possible, and the process proceeds to step S110 where the shooting process is performed.

  The photographing process step S110 is executed when it is determined in step S109 that the shutter switch 113 is fully pressed. In the imaging processing step S110, as described above, the imaging sensor 110 is exposed based on the exposure amount determined in steps S101 and S102, and the acquired image data is recorded on the recording medium of the recording unit 112.

  FIG. 6A is a diagram illustrating a finder display example when it is determined that the chart can be appropriately captured in the chart capturing mode. Similarly, FIG. 6B is a diagram illustrating a finder display example when it is determined that the chart cannot be properly captured. As shown in FIG. 6B, when the chart as the subject is deviated from the chart photographing frame 401, the distance measurement sensor output values at the respective autofocus indices 403 to 406 are expected to be large. The distance difference ΔL becomes larger than the predetermined threshold value TL. Therefore, it is determined to be inappropriate for chart photographing, “NG” is displayed, and the process is terminated.

  As described above, according to the present embodiment, when chart photographing for the purpose of creating a color profile is performed, it is determined whether or not chart photographing can be appropriately performed, the determination result is displayed, and the photographing is impossible. When the determination is made, shooting control is performed to prohibit shooting. Specifically, chart misalignment can be prevented by determination based on distance measurement results at a plurality of locations within the imaging range, that is, a plurality of indices. Further, by determining the aperture value according to the distance measurement, it is possible to appropriately adjust the focus at the time of shooting. In addition, by correcting the exposure amount with respect to the photometric value according to the type of chart, chart photographing with an appropriate exposure amount is possible. Thereby, it is possible to always perform chart photography with the correct chart position, accurate focus, and correct angle of view, and even a user with little chart photography experience can easily perform appropriate photography. As a result, an improvement in the accuracy of the color profile created using the captured image information of the chart can be expected.

<Modification>
In the present embodiment, the interchangeable lens type digital single-lens reflex camera has been described as an example. However, the format of the camera is not limited to this, for example, a compact type digital camera with a fixed lens or a digital video camera. Also good. Further, although the transmissive liquid crystal element has been described as an example of the finder display element, the present invention can also be implemented by a method of displaying a chart frame by illuminating the finder screen with a light emitting diode. Furthermore, the present invention can be implemented by other finder configurations and display unit configurations, such as displaying a finder image, a chart frame, and a chart selection screen on a liquid crystal display element or an electroluminescence element without having an optical finder.

  In this embodiment, the exposure determination method in the chart photographing mode has been described as being the same as that in the aperture priority mode. However, the exposure determination method is not limited to this and may be similar to the shutter speed priority mode, the program mode, and the manual mode. Needless to say. Moreover, you may comprise so that a user can select the exposure determination method and exposure correction amount. However, when a correction suitable for the chart is applied as in step S102 of FIG. 5, a predetermined amount corresponding to each mode is corrected. For example, the aperture value is corrected in the shutter speed dominant mode, the aperture value and the shutter time are corrected in the program mode, and the shutter time is corrected in the manual mode.

  Further, in the present embodiment, it is determined whether or not chart photographing can be appropriately performed by calculating the maximum distance measurement distance difference ΔL, the depth of field o, the subject size h, and the subject distance d. The calculation method and the like are not limited to the method described above. The parameter may be calculated by any method as long as a similar determination result can be obtained. Further, it is not necessary to use all these values for the determination, and determination may be made using an amount corresponding to at least one of these values. Further, the determination criterion is not limited to the example in the determination step S106.

<Other embodiments>
Although the embodiment has been described in detail above, the present invention can take an embodiment as a system, apparatus, method, program, recording medium (storage medium), or the like. Specifically, the present invention may be applied to a system composed of a plurality of devices (for example, a host computer, an interface device, an imaging device, a web application, etc.), or may be applied to a device composed of a single device. good.

  The present invention also provides a software program that realizes the functions of the above-described embodiments directly or remotely to a system or apparatus, and the system or apparatus computer reads out and executes the supplied program code. Achieved. The program in this case is a computer-readable program that corresponds to the flowchart shown in the drawing in the embodiment.

  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, or the like.

  Recording media for supplying the program include the following media. For example, floppy disk, hard disk, optical disk, magneto-optical disk, MO, CD-ROM, CD-R, CD-RW, magnetic tape, nonvolatile memory card, ROM, DVD (DVD-ROM, DVD- R).

  As a program supply method, the following method is also possible. That is, the browser of the client computer is connected to a homepage on the Internet, and the computer program itself (or a compressed file including an automatic installation function) of the present invention is downloaded to a recording medium such as a hard disk. It can also be realized by dividing the program code constituting the program of the present invention into a plurality of files and downloading each file from a different homepage. That is, a WWW server that allows a plurality of users to download a program file for realizing the functional processing of the present invention on a computer is also included in the present invention.

  In addition, the program of the present invention is encrypted, stored in a storage medium such as a CD-ROM, distributed to users, and key information for decryption is downloaded from a homepage via the Internet to users who have cleared predetermined conditions. It is also possible to make it. That is, the user can execute the encrypted program by using the key information and install it on the computer.

  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 also be realized by the processing.

  Further, the program read from the recording medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, and then executed, so that the program of the above-described embodiment can be obtained. Function is realized. That is, based on the instructions of the program, the CPU provided in the function expansion board or function expansion unit can perform part or all of the actual processing.

It is a block diagram which shows the structure of the digital single-lens reflex camera of one Embodiment which concerns on this invention. It is a top view of the digital single-lens reflex camera of this embodiment. It is a rear view of the digital single-lens reflex camera of this embodiment. It is an external view of the imaging | photography mode switching part 114 in this embodiment. It is a figure which shows the example of a display of the finder display element in this embodiment. It is a flowchart which shows the imaging | photography process at the time of the chart imaging | photography mode in this embodiment. It is a figure which shows the example of a finder display (OK) in this embodiment. It is a figure which shows the example of a finder display (NG) in this embodiment.

Claims (7)

Finder display means for displaying the subject within the display range ;
Ranging means for measuring a plurality of distances to the subject corresponding to a plurality of locations within the display range of the finder display means ;
Obtaining means for obtaining the size of the subject within the display range;
It has a maximum difference thus calculated from the measured plurality of distances to the distance measuring means, and have groups Dzu to the size of the object obtained by the obtaining means, a plurality of color patches that can produce a color profile and determine the constant means the subject you determine whether it is capable of capturing a chart,
When the subject is determined prior SL-size constant means that it is possible photographed as the chart, and Kagete stage Taking for photographing the subject as the chart,
When the subject is determined prior SL-size constant means when there shooting impossible as the chart, and a notification means for providing notification that the subject is captured not as the chart,
An imaging device comprising: The finder display means displays a chart photographing frame for guiding the subject to a photographing position in order to photograph the subject as the chart within the display range ,
The imaging apparatus according to claim 1, wherein the distance measuring means measures distances to the subject corresponding to a plurality of locations of the chart photographing frame within the display range . The imaging apparatus according to claim 1, wherein the determination unit determines that the subject cannot be photographed as the chart when the calculated maximum difference is larger than a predetermined threshold. . And a means for obtaining a depth of field,
4. The method according to claim 1, wherein the determination unit determines that the subject cannot be photographed as the chart when the maximum difference is larger than the depth of field. 5. The imaging device described. A method for controlling an imaging device,
A viewfinder display step for displaying the subject within the viewfinder display range ;
A distance measuring step for measuring a plurality of distances to the subject corresponding to a plurality of locations in the display range ;
An acquisition step of acquiring a size of the subject within the display range;
And maximum difference calculated from a plurality of distances Oite measured the distance measuring step, and have size and based Dzu of the acquired object in the acquisition step, a plurality of color patches that can produce a color profile and determine the constant step you determine whether the subject can be photographed as charts having,
When the subject is determined in the determining step that it is possible to shoot as the chart, the imaging step of shooting the object as the chart,
A notification step for providing a notification indicating that the subject cannot be photographed as the chart when it is determined in the determination step that the subject is not photographable as the chart ;
A method for controlling an imaging apparatus, comprising: A computer program that, when executed by a computer, causes the computer to function as the imaging device according to any one of claims 1 to 4 . A computer-readable recording medium on which the computer program according to claim 6 is recorded.

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