JP2010145979A - Imaging apparatus, method for controlling the same and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To switch, according to an imaging mode, exposure control applied through photometry, using color components or photometry that uses a luminance component. <P>SOLUTION: The imaging apparatus separates a light from a subject into a plurality of color components. The apparatus captures a first photometric value, corresponding to the value of each of the plurality of color components or a second photometric value corresponding to the value of the luminance component of the light from the subject, and controls the exposure, according to the photometric value captured. According to one of the imaging modes, the imaging apparatus captures the preset first photometric value or a second photometric value. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an imaging apparatus, a control method thereof, and a program.

In addition to the method of performing exposure control using the luminance component of the subject as a photometric value, the conventional imaging apparatus performs exposure measurement by separating light incident on the optical system into a plurality of color components and measuring the photometric value of each color component. There is a method of performing exposure control by calculating an exposure control value using the maximum value (Patent Document 1). When this photometric value of the color component is used, it is possible to perform more appropriate exposure control even when imaging a subject with rich colors, compared to the case where the photometric value of the luminance component is used.
JP-A-6-281994

  Photometry using color components is characterized in that exposure control varies as the color temperature of light from the subject changes. Therefore, there has been a demand for performing exposure control by photometry using a luminance component in a specific scene imaging mode. However, in the above prior art, photometry using a color component is performed in any imaging mode, and exposure control cannot be performed by photometry using a luminance component.

  For example, at the time of strobe imaging, the color temperature of light from the subject changes due to the strobe light, so that the color temperature differs between non-light emission and dimming light emission. Therefore, when the amount of strobe light emission at the time of imaging is determined by photometry using color components, the light emission amount is not appropriate, and a dark image or a bright image may be captured. Also, in a scene imaging mode where a specific color component such as red or blue is dominant, the photometric value tends to increase when photometry using the color component is performed, and exposure control is performed in a darker direction. There was a thing. In such a case, exposure can be made appropriate by performing photometry using a luminance component that is not easily affected by the color temperature, so exposure is not performed using a color component but by using a luminance component. There was a demand for control.

  The present invention has been made for the purpose of solving such problems of the prior art. An object of the present invention is to provide an imaging apparatus capable of switching exposure control by photometry using color components or photometry using luminance components in accordance with an imaging mode, a control method thereof, and a program.

  In order to achieve the above object, an imaging apparatus according to the present invention is an imaging apparatus that images a subject in any one of a plurality of imaging modes, from the subject separated into a plurality of color components. A photometric means for obtaining one of a first photometric value corresponding to each value of the plurality of color components of light and a second photometric value corresponding to the value of a luminance component of light from the subject; Exposure control means for performing exposure control in accordance with the photometric value acquired by the photometric means, wherein the photometric means is one of the first photometric value and the second photometric value in accordance with the imaging mode. It is characterized by acquiring.

  The above object is also a method of controlling an imaging device that images a subject in any one of a plurality of imaging modes, the plurality of colors of light from the subject separated into a plurality of color components A first photometric value corresponding to each value of the component, and a second photometric value corresponding to the value of the luminance component of light from the subject, and a photometric step acquired by the photometric step An exposure control step of performing exposure control according to the photometric value, wherein the photometric step acquires either the first photometric value or the second photometric value according to the imaging mode. It is also achieved by the control method of the imaging apparatus according to the present invention.

  According to the present invention, exposure control by photometry using color components or photometry using luminance components can be switched according to the imaging mode.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments. Further, the embodiment of the present invention shows the most preferable mode of the invention, and does not limit the scope of the invention.

  FIG. 1 is a block diagram illustrating a configuration of an imaging apparatus 1 according to the present embodiment. As illustrated in FIG. 1, the imaging apparatus 1 includes a camera unit 101, a central control unit 102, a recording / playback processing unit 103, an input unit 104, a display unit 105, and a strobe 106.

  In the camera unit 101, the imaging lens group 111 is a zoom lens, a focus lens, or the like, and forms an object image on the imaging element 113. The imaging lens group 111 has a zoom magnification of a subject image formed on the imaging element 113 by driving each lens in the optical axis direction by an actuator (not shown) driven under the control of the camera control unit 116. Adjustment and focus adjustment are possible.

  The light amount adjustment unit 112 is an aperture, a shutter, a neutral density filter, and the like, and adjusts the exposure amount in the image sensor 113. In the light amount adjusting unit 112, the aperture amount, shutter time, and reduced light amount are adjusted by a driving unit (not shown) such as an actuator controlled by the camera control unit 116.

  The image sensor 113 converts a light beam as a subject image that has passed through the image sensor 113 and the light amount adjusting unit 112 into an electrical signal by photoelectric conversion. Specifically, the image sensor 113 is a CCD (Charge Coupled Device), a CMOS (Complementary Metal Oxide Semiconductor) image sensor, or the like.

  Here, the pixel arrangement of the image sensor 113 will be described with reference to FIG. FIG. 2 is a diagram illustrating a pixel array of the image sensor 113. As shown in FIG. 2, the pixel array of the image sensor 113 is a Bayer array in which BG rows and GR rows are alternately arranged. Here, the Bayer array image sensor 113 is shown, but an image sensor other than the Bayer array may be used as long as it can receive light by separating a plurality of color components. R represents a red filter, G represents a green filter, and B represents a blue filter.

  The signal conversion unit 114 converts the electric signal (analog signal) obtained by the image sensor 113 into a digital signal based on the control signal from the central control unit 102. The imaging signal processing unit 115 performs various image processing on the digitally converted electrical signal in accordance with the control signal from the central control unit 102.

  The camera control unit 116 controls the operation of the camera unit 101 and whether or not the strobe 106 emits light under the control of the central control unit 102. Specifically, the camera control unit 116 performs drive control of the zoom lens and the focus lens of the imaging lens group 111 according to the control signal from the central control unit 102. In addition, the camera control unit 116 performs exposure control by adjusting the aperture amount, shutter time, and light reduction amount in the light amount adjustment unit 112 according to the control signal from the central control unit 102 and whether or not the strobe 106 emits light.

  The central control unit 102 includes a processing unit 121, a ROM 122, an operation input I / F unit 123, and a display control unit 124 that are electrically connected to each unit, and performs overall control of the operation of the imaging apparatus 1. The processing unit 121 is a CPU (Central Processing Unit), a microcontroller, or the like, and performs overall control of the imaging apparatus 1 by sequentially executing program codes developed in a work area of a RAM (not shown). For example, the processing unit 121 determines an aperture, a shutter speed, and the like according to a control diagram (program diagram) stored in the ROM 122, and outputs a control signal corresponding to the determination to the camera control unit 116, whereby the image sensor 113. Control exposure. A ROM 122 (Read Only Memory) stores program codes executed by the processing unit 121 and various setting data.

  The operation input I / F unit 123 is an interface that receives an operation signal output from the input unit 104 in response to a user operation input and outputs the operation signal to the processing unit 121. The display control unit 124 performs display control of the display unit 105 by generating a video signal to be displayed on the display unit 105 and outputting the video signal to the display unit 105 under the control of the processing unit 121.

  For example, the display control unit 124 generates a video signal based on an electrical signal (image data) sequentially imaged by the imaging element 113 and subjected to image processing by the imaging signal processing unit 115 and displays the video signal on the display unit 105. Thereby, in the imaging device 1, an electronic viewfinder (EVF) display can be performed. Further, the display control unit 124 may generate a video signal for OSD (On-Screen Display) display and display it on the display unit 105 under the control of the processing unit 121. Thereby, in the imaging device 1, an operation screen and various information can be displayed on the display unit 105. In addition, the imaging apparatus 1 may display the current imaging mode, photometric information, and the like superimposed on the EVF display.

  Under the control of the central control unit 102, the recording / playback processing unit 103 records data on a recording medium (not shown) such as an optical disk or a semiconductor memory, and reads data recorded on the recording medium. Specifically, the recording / playback processing unit 103 converts the electrical signal (image data) captured by the image sensor 113 and subjected to image processing by the imaging signal processing unit 115 into image data of a predetermined format, The converted image data is recorded on a recording medium.

  For example, when sequential imaging is performed by the imaging device 113, moving image data in a predetermined format such as MPEG (Moving Picture Experts Group) is recorded on the recording medium. When a still image is captured by the image sensor 113, still image data in a predetermined format such as JPEG (Joint Photographic Experts Group) is recorded on the recording medium. In addition, when image data (still image or moving image) recorded on a recording medium is read, the read image data is output to the display control unit 124 and displayed on the display unit 105. The image is played back.

  The input unit 104 is a button that receives a user operation input, a touch panel disposed on the display unit 105, and the like, and outputs an operation signal corresponding to the operation input to the operation input I / F unit 123. Specifically, the input unit 104 includes a power button for instructing power on / off, a photo button for instructing start of imaging, a mode button for instructing switching of various operation modes, etc. (Not shown).

  The photo button is composed of a two-stage switch that outputs different operation signals in a half-pressed state and a fully-pressed state. For this reason, when imaging is started by fully pressing the photo button, photometry necessary for focus adjustment and exposure control can be performed in advance before imaging by half pressing the photo button.

  The mode button includes a still image recording mode in which a still image is captured and recorded on a recording medium, a moving image recording mode in which a moving image is captured and recorded on a recording medium, and a playback mode in which an image recorded on the recording medium is reproduced. Accept switching instructions. The mode button also accepts an instruction to switch the imaging mode at the time of imaging in the still image recording mode, an instruction to switch whether or not the strobe 106 emits light, and the like.

  The imaging mode is a mode realized by combining the shutter speed and aperture value of the light amount adjustment unit 112 suitable for the imaging scene, the light emission state of the strobe 106, the sensitivity setting of the imaging element 113, and the like. The imaging device 1 in the present embodiment has an auto mode, a manual mode, and various scene modes.

  The auto mode is a mode in which the central control unit 102 automatically adjusts parameters such as a shutter speed and an aperture value based on image data acquired by the image sensor 113. The manual mode is a mode in which various parameters of the imaging apparatus 1 can be freely changed by the user operating the input unit 104. The various scene modes are modes that are automatically set by selecting any one of the imaging scenes in combination with the shutter speed and aperture value suitable for the imaging scene, the flash emission state, the sensitivity setting, and the like.

  Scene modes include portrait mode, night view mode, sunset view mode, landscape mode, night & snap mode, kids & pet mode, fresh green & autumnal leaves mode, party mode, snow mode, beach mode, fireworks mode, aquarium mode, underwater mode and so on. The portrait mode is a mode in which, for example, a setting is made to release the aperture so that the background is blurred to make the person stand up, and imaging specialized for the person is performed. The night view mode is a mode in which an image specialized for a night scene is obtained by applying a strobe light to a person and recording the background at a slow shutter speed. The sunset scene mode is a mode in which imaging is performed with a control diagram for selecting a shutter speed and an aperture value suitable for a sunset scene with many red color components. The landscape mode is a mode in which, for example, the entire landscape is precisely imaged by narrowing down, and the image is specialized for the landscape scene. The night & snap mode is a mode that takes a night view and a person beautifully without a tripod. The kids & pet mode is a mode in which, for example, a child or a pet who moves around frequently can be imaged without missing a photo opportunity by prefocus or predictive focus. The fresh green & autumnal leaves mode is a mode in which trees and leaves such as fresh green are imaged vividly. The party mode is a mode that suppresses camera shake and captures a color faithful to the subject even when imaging under a fluorescent lamp or a light bulb. The snow mode is a mode in which a person does not become dark even when a snow background is placed in the background and the image is taken without leaving blueness. The beach mode is a mode in which a person or the like can capture an image even on the sea surface or sandy beach where sunlight is strongly reflected. The fireworks mode is a mode in which an optimum exposure for the fireworks is set and the fireworks are vividly imaged. The aquarium mode is a mode for setting sensitivity, white balance, and color suitable for imaging a fish in an indoor aquarium. The underwater mode is a mode in which a white balance suitable for underwater is set and an image is picked up with a tint with reduced bluishness.

  The display unit 105 is an LCD (Liquid Crystal Display) or the like, and displays an image corresponding to the video signal output from the display control unit 124. The strobe 106 is a xenon tube or a white light emitting diode that emits light under the control of the camera control unit 116, and irradiates the subject with auxiliary light when capturing a still image or a moving image.

  Next, a photometric method performed in the imaging apparatus 1 under the control of the central control unit 102 will be described in detail. The photometry method performed by the imaging apparatus 1 includes a photometry method using a color component of light from a subject and a photometry method using only a luminance component of light from the subject.

  The photometric method using color components is a photometric method in which light from a subject is decomposed into a plurality of color components and a photometric value (first photometric value) corresponding to each value of the plurality of color components is obtained. Specifically, the following procedure is performed under the control of the central control unit 102.

  First, a subject image received by being separated into a plurality of color components by the image sensor 113 is converted into a digital signal by the signal converter 114. Therefore, the largest one of the color components is acquired as a photometric value. In this case, the photometric value may be weighted according to the area of the captured image, such as increasing the weight of the center of the subject image.

  Next, the central control unit 102 compares the obtained photometric value with a target value serving as a brightness reference, and outputs a control signal corresponding to the comparison result to the camera control unit 116. The camera control unit 116 performs exposure control according to the control signal from the central control unit 102, thereby setting the subject image captured by the image sensor 113 to an appropriate exposure. Specifically, exposure control is performed in a darker direction (throttle or faster shutter speed) if the photometric value is higher than the target value, and brighter (open or shutter speed) if the photometric value is lower than the target value. To slow down the exposure).

  On the other hand, the photometric method using the luminance component is a photometric method for obtaining a photometric value (second photometric value) corresponding to the value of the luminance component of the light from the subject. Specifically, the following procedure is performed under the control of the central control unit 102.

  First, a subject image received by being separated into a plurality of color components by the image sensor 113 is converted into a digital signal by the signal converter 114. Therefore, the components of the respective colors are added at a specific ratio, and the resulting luminance is acquired as a photometric value. In this case, the photometric value may be weighted according to the area of the captured image, such as increasing the weight of the center of the subject image.

  Next, the central control unit 102 compares the obtained photometric value with a target value serving as a brightness reference, and outputs a control signal corresponding to the comparison result to the camera control unit 116. The camera control unit 116 performs exposure control according to the control signal from the central control unit 102, thereby setting the subject image captured by the image sensor 113 to an appropriate exposure. Specifically, exposure control is performed in a direction that darkens if the photometric value is higher than the target value, and exposure control is performed in a direction that brightens if the photometric value is lower than the target value.

  In the present embodiment, the configuration in which the photometric value is calculated using the color component or the luminance component from the image captured by the image sensor 113 is exemplified. However, if the photometry can be performed by the two photometric methods described above, the image sensor 113 is particularly preferable. It is not limited to the structure using. For example, the imaging device 1 may be configured to include a photometric sensor that can measure a color component by providing a color filter.

  In the imaging apparatus 1 according to the present embodiment, metering is performed by a photometric method using a color component in a normal state, and switching to a photometric method using a luminance component during strobe imaging in which the strobe 106 is emitted. Specifically, the photometric value measured during dimming (pre-flash) to determine the amount of strobe light emission during main imaging prior to strobe imaging (main imaging) is obtained from the luminance component of the subject light. Will be. For this reason, the photometric value at the time of light control light emission is not easily influenced by the strobe light or the color temperature of the subject. Therefore, the amount of light emission at the time of actual imaging is stabilized, and the exposure can be prevented from becoming extremely bright or dark due to the color temperature of the subject.

  FIG. 3 is a flowchart illustrating an operation at the time of strobe imaging performed by the imaging apparatus 1 under the control of the central control unit 102. As shown in FIG. 3, when the process is started, the central control unit 102 performs photometry in S301 using a photometric method using color components. Based on the photometric result in S301, the central control unit 102 performs exposure control of subject images sequentially captured by the image sensor 113, and causes the display unit 105 to display EVFs on the subject images sequentially captured with appropriate exposure. In this EVF display, since exposure control is performed by a photometric method using color components, it is possible to display a subject image with optimum brightness in many scenes.

  Next, in S302, the central control unit 102 determines whether or not the photo button is half-pressed, and waits for processing until the photo button is half-pressed. By S302, the imaging apparatus 1 continues the EVF display by exposure control in the photometric method using the color component until the photo button is half-pressed.

  Next, when the photo button is half-pressed (S302: YES), the central control unit 102 fixes the focus adjustment and the exposure control to the optimum state at that time. Therefore, it is not necessary to perform photometry while the photo button is pressed halfway, and the central control unit 102 switches the photometry method from the photometry method using the color component to the photometry method using the luminance component at this time (S303). Note that the timing of switching the photometry method may be any timing as long as the photo button is fully pressed and light control light emission is performed.

  Next, in S304, the central control unit 102 determines whether or not the photo button is fully pressed, and waits for processing while the half-pressed state is maintained. When the photo button is fully pressed, the central control unit 102 performs photometry in a non-light emitting state by a photometry method using a luminance component in S305. Next, the central control unit 102 causes the strobe 106 to dimm and emit light in S306, and obtains a photometric value at the time of dimming light emission by a photometric method using a luminance component in S307.

  Next, in S308, the central control unit 102 determines the flash emission amount at the time of imaging from the photometric values at the time of non-light emission and light control light emission. Since the flash emission amount is determined using a photometric value acquired from the luminance component of the subject's light, compared to the case where the photometric value acquired from the color component is used, the flash It becomes difficult to be influenced by temperature.

  Next, in step S309, the central control unit 102 causes the strobe 106 to emit light with the determined strobe emission amount, and emits light by exposure control based on the strobe emission amount and the photometric values at the time of non-emission and dimming emission. Take an image. After the light emission imaging, the central control unit 102 switches the photometry method from the photometry method using the luminance component to the photometry method using the color component in S310.

  If the half-press is released after the photo button is pressed halfway, the central control unit 102 switches the photometry method from the photometry method using the luminance component to the photometry method using the color component in S311, and the process proceeds to S302. To return.

  In the above-described processing, an example in which the photometry method is switched only at the time of strobe imaging is shown. However, there are many scenes in which strobe imaging is performed, and there are many relatively dark scenes, and it is considered that there is little difference between a photometric value obtained by a photometric method using a luminance component and a photometric value obtained by a photometric method using a color component. Therefore, at the time of shifting to the imaging mode capable of flash emission, the photometry method using the color component may be switched to the photometry method using the luminance component. As a result, the procedure of switching the photometry method during strobe imaging can be omitted, and the processing during strobe imaging can be further simplified.

  In addition, when shooting scenes in which a specific color component is dominant, such as red or blue, the photometric value obtained with a photometric method that uses the color component is large, so exposure control is performed in the direction of darkening, resulting in proper brightness. It may be darker than this. In such an imaging mode for imaging a scene in which a specific color component is dominant, when the mode is shifted to the mode, the photometry method using the color component may be switched to the photometry method using the luminance component. This makes it possible to perform exposure control using a luminance component that is not easily influenced by the color component when capturing a scene where a specific color component is dominant. Imaging becomes possible.

  In the following, an imaging process that is controlled by the central control unit 102 and switches the photometry method according to a preset imaging mode will be described with reference to FIG. FIG. 4 is a flowchart showing the imaging process of the imaging apparatus 1. As shown in FIG. 4, when the imaging process is started by turning on the power or the like, the central control unit 102 sets a photometric method using color components in S401.

  Next, the central control unit 102 determines the imaging mode set by the mode button in S402. When it is determined in S402 that the imaging mode for performing the flash emission is set, the central control unit 102 advances the process to S403, and performs the imaging process by the flash emission described with reference to FIG. Note that imaging modes that perform strobe light emission include, for example, a night view mode and a night & snap mode. Further, the process may proceed to S403 also when the flash is set to be emitted by the mode button or when it is determined that the flash emission is necessary by performing photometry when determining the imaging mode in S402.

  If it is determined in S402 that the scene imaging mode in which the specific color component is dominant is set, the central control unit 102 advances the process to S404 to change the photometric method from the photometric method using the color component to the luminance component. Switch to photometry method using, and proceed to S405. The imaging mode of a scene in which a specific color component is dominant includes, for example, an evening scene mode in which imaging is performed in a scene in which red color is dominant and an underwater mode in which imaging is performed in a scene in which blue is dominant. Is remembered.

  If it is determined in S402 that the normal imaging mode without strobe emission is set instead of the scene imaging mode in which the specific color component is dominant, the central control unit 102 determines from the photometry method using the color component. The process proceeds to S405 without switching.

  Next, in S405, the central control unit 102 determines whether or not the photo button has been fully pressed, and waits for processing until it is fully pressed. At this time, the central control unit 102 may perform processing such as photometry and focus adjustment in response to half-pressing of the photo button. When the photo button is fully pressed, the central control unit 102 acquires a photometric value by the set photometric method in S406. Next, in S407, the central control unit 102 performs imaging with exposure control according to the acquired photometric value, and ends the process.

  Note that the description in the above-described embodiment shows an example, and the present invention is not limited to this. The configuration and operation in the embodiment described above can be changed as appropriate.

(Other embodiments)
The above-described embodiment can also be realized in software by a computer of a system or apparatus (or CPU, MPU, etc.). Therefore, the computer program itself supplied to the computer in order to implement the above-described embodiment by the computer also realizes the present invention. That is, the computer program itself for realizing the functions of the above-described embodiments is also one aspect of the present invention.

  The computer program for realizing the above-described embodiment may be in any form as long as it can be read by a computer. For example, it can be composed of object code, a program executed by an interpreter, script data supplied to the OS, but is not limited thereto. A computer program for realizing the above-described embodiment is supplied to a computer via a storage medium or wired / wireless communication. Examples of the storage medium for supplying the program include a magnetic storage medium such as a flexible disk, a hard disk, and a magnetic tape, an optical / magneto-optical storage medium such as an MO, CD, and DVD, and a nonvolatile semiconductor memory.

  As a computer program supply method using wired / wireless communication, there is a method of using a server on a computer network. In this case, a data file (program file) that can be a computer program forming the present invention is stored in the server. The program file may be an executable format or a source code. The program file is supplied by downloading to a client computer that has accessed the server. In this case, the program file can be divided into a plurality of segment files, and the segment files can be distributed and arranged on different servers. That is, a server apparatus that provides a client computer with a program file for realizing the above-described embodiment is also one aspect of the present invention.

  In addition, a storage medium in which the computer program for realizing the above-described embodiment is encrypted and distributed is distributed, and key information for decrypting is supplied to a user who satisfies a predetermined condition, and the user's computer Installation may be allowed. The key information can be supplied by being downloaded from a homepage via the Internet, for example. Further, the computer program for realizing the above-described embodiment may use an OS function already running on the computer. Further, a part of the computer program for realizing the above-described embodiment may be configured by firmware such as an expansion board attached to the computer, or may be executed by a CPU provided in the expansion board. Good.

It is a block diagram which shows the structure of the imaging device which concerns on this embodiment. It is a figure which illustrates the pixel arrangement | sequence of an image pick-up element. It is a flowchart which shows the operation | movement at the time of strobe imaging of the imaging device which concerns on this embodiment. It is a flowchart which shows the imaging process of the imaging device which concerns on this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Imaging device 101 Camera part 102 Central control part 103 Recording / reproducing process part 104 Input part 105 Display part 106 Strobe 111 Imaging lens group 112 Light quantity adjustment part 113 Imaging element 114 Signal conversion part 115 Imaging signal processing part 116 Camera control part 121 Processing part 122 ROM
123 Operation input I / F unit 124 Display control unit

Claims (6)

An imaging apparatus for imaging a subject in any one of a plurality of imaging modes, wherein a first unit corresponding to a value of each of the plurality of color components of light from the subject decomposed into a plurality of color components A photometric means for obtaining one of a photometric value of 1 and a second photometric value corresponding to a value of a luminance component of light from the subject;
Exposure control means for performing exposure control according to a photometric value acquired by the photometry means;
With
The photometric means acquires either the first photometric value or the second photometric value according to the imaging mode. A light emitting means for irradiating the subject;
The photometric means acquires the second photometric value when acquiring a photometric value in order to determine a light emission amount of the light emitting means in an imaging mode in which the light emitting means is irradiated to take an image. The imaging apparatus according to claim 1.   The imaging apparatus according to claim 2, wherein the photometric unit acquires the second photometric value in an imaging mode in which imaging is performed by irradiating the light emitting unit.   4. The device according to claim 1, wherein the photometric unit acquires the second photometric value in an imaging mode for imaging a subject in which a predetermined color component is dominant. 5. Imaging device. A method for controlling an imaging apparatus that images a subject in any one of a plurality of imaging modes,
A first photometric value corresponding to each value of the plurality of color components of the light from the subject decomposed into a plurality of color components, and a second corresponding to the value of the luminance component of the light from the subject A photometric process for obtaining one of the photometric values;
An exposure control step of performing exposure control according to the photometric value acquired by the photometric step;
Including
The method of controlling an imaging apparatus, wherein the photometric step acquires either the first photometric value or the second photometric value according to the imaging mode.   A program for causing a computer to execute each step of the method for controlling the imaging apparatus according to claim 5.

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