JP2015166767A - Photometric device and imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photometric device capable of controlling more stabilized exposure while giving priority to a highlight portion in a screen.SOLUTION: A photometric device includes: an imaging part 112 in which subject light is imaged in a plurality of imaging regions and image data in each imaging region is obtained; a first calculation part 103 which calculates a luminance value in each imaging region from the image data obtained in each imaging region; a correction part 103 which performs correction for reducing the luminance value in the imaging region suited to a pre-set condition; and a second calculation part 103 which calculates the luminance value for controlling exposure based on the luminance value in the brightest imaging region among a plurality of imaging regions after correction.

Description

  The present invention relates to a photometric device and an imaging device including the same.

  In recent years, the performance of multi-segment photometry has improved, and it has become possible to control exposure with almost no failure in most shooting scenes. However, in the case of a special scene on the stage where the background is dark and only a person is spotlighted, it may be difficult to control the appropriate exposure. In order to solve this problem, there has been proposed a camera that controls exposure by referring to the brightness of the AF area in which the user has focused (see, for example, Patent Document 1).

JP 2000-75352 A

  In the camera described in Patent Document 1, when the AF area is shifted from the subject, the exposure may not be appropriately controlled. On the other hand, a photometric method that controls exposure by referring to the luminance of a highlight portion existing in the screen regardless of the position of the AF area is known. However, in this photometry method, it is conceivable that appropriate exposure control cannot be performed in a scene where high-luminance light exists in addition to the main subject in the screen because it is affected by the high-luminance light. For example, on the stage, when the background is dark and only a person is hit by a spotlight, the scene has high-intensity reflected light in the background. In this case, it is conceivable that the exposure becomes under due to the influence of high-luminance light and the human face cannot be reproduced with appropriate brightness.

  An object of the present invention is to provide a photometric device and an imaging device capable of performing more stable exposure control while giving priority to a highlight portion in a screen.

According to the first aspect of the present invention, an imaging unit that captures subject light in a plurality of imaging regions and acquires image data of each imaging region, and a luminance value of each imaging region from the image data acquired in each imaging region A correction unit that performs correction for reducing the luminance value of the imaging region that satisfies a preset condition, and the luminance of the brightest imaging region among the plurality of corrected imaging regions A second calculation unit that calculates a brightness value for exposure control based on the value.
According to a second aspect of the present invention, in the photometric device according to the first aspect, the correction unit averages the luminance value of each imaging region calculated by the first calculation unit and calculates its standard deviation. As an imaging region that meets a preset condition, an imaging region that has a luminance value higher than the luminance range set based on the standard deviation is corrected so that the luminance value becomes zero.
According to a third aspect of the present invention, in the photometric device according to the second aspect, the correction unit is configured to, based on the standard deviation, a first luminance range and a second luminance that is higher in luminance than the first luminance range. A range is set, a weighting value of an imaging region whose luminance value is included in the first luminance range is set to 1, a weighting value of an imaging region whose luminance value exceeds the second luminance range is set to 0, and each imaging region is set The brightness value of is corrected.
According to a fourth aspect of the present invention, in the photometric device according to the third aspect, the correction unit is a weighting value of an imaging region in which a luminance value exceeds the first luminance range and is equal to or less than the second luminance range. Is set in a range of 0.1 to 0.9 according to the luminance value of the imaging region.
According to a fifth aspect of the present invention, in the photometric device according to any one of the first to fourth aspects, the second calculation unit includes a luminance value of the brightest imaging region among the plurality of corrected imaging regions, The exposure control luminance value is calculated using an adjustment value set according to the luminance of the subject.
According to a sixth aspect of the present invention, in the photometric device according to any one of the first to fifth aspects, the imaging unit acquires image data for recording.
According to a seventh aspect of the present invention, in the photometric device according to any one of the first to fifth aspects, recording image data is acquired by another imaging unit different from the imaging unit.
The invention described in claim 8 is an imaging apparatus including the photometric device according to any one of claims 1 to 7.
According to a ninth aspect of the present invention, in the imaging apparatus according to the eighth aspect, the brightest imaging among the plurality of corrected imaging areas is performed while reducing the luminance value of the imaging area that meets a preset condition. The photometry method for calculating the exposure control luminance value based on the luminance value of the region can be switched on and off.
According to a tenth aspect of the present invention, in the imaging device according to the ninth aspect, the stage photography scene mode is configured to be selectable, and the photometry method is set to ON when the stage photography scene mode is selected. To do.

  According to the present invention, it is possible to provide a photometric device and an imaging device that can perform more stable exposure control while giving priority to a highlight portion in a screen.

It is a block diagram of the camera 1 of embodiment. 3 is a perspective view illustrating a specific example of an operation unit 101. FIG. FIG. 10 is a schematic diagram illustrating a divided imaging region of the second imaging unit 112. 4 is a flowchart illustrating a procedure of basic photographing processing executed by a control unit 103. 5 is a flowchart illustrating a procedure of highlight weighted photometry processing executed by a control unit 103. 6 is a schematic diagram illustrating an example of an image captured by a second imaging unit 112. FIG. (A) is a schematic diagram which shows the luminance value in each imaging area of the 2nd imaging part 112. FIG. (B) is a schematic diagram showing a weighting table. (C) is a schematic diagram showing an output evaluation value in each imaging region of the second imaging unit 112. 6 is a histogram showing a distribution of luminance values calculated by the control unit 103.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a camera 1 according to the present embodiment. FIG. 2 is a perspective view illustrating a specific example of the operation unit 101. FIG. 3 is a schematic diagram illustrating a divided imaging region of the second imaging unit 112.

  As shown in FIG. 1, a camera 10 as an imaging device includes a camera body 100 and a lens barrel 200. The camera 10 is an interchangeable lens type digital single-lens reflex camera in which the lens barrel 20 is detachably attached to the camera body 100.

  The camera body 100 includes an operation unit 101, a first imaging unit 102, a control unit 103, a memory card slot 104, a monitor 105, and a display panel 106. The camera body 100 includes a mirror 107, a shutter 108, a display unit 109, a prism 110, a photometric lens 111, a second imaging unit 112, and an eyepiece unit 113.

  The operation unit 101 includes a plurality of input members operated by a user. As shown in FIG. 2, the operation unit 101 includes a mode dial 121, a release button 122, a main dial 123, a sub dial 124, a selector dial 125, a photometric mode dial 126, and other various buttons and switches (not shown). It is.

  The mode dial 121 is a dial operated when the user selects a shooting mode or a shooting scene. By selecting a desired shooting mode on the mode dial 121, the user can determine the shutter speed, aperture value, etc. by himself / herself and take a picture. Shooting modes that can be selected by the user include, for example, a P (program auto) mode, an S (shutter priority auto) mode, an A (aperture priority auto) mode, and an M (manual) mode.

  In addition, by selecting a desired shooting scene on the mode dial 121, the user can take a picture under shooting conditions that are optimal for the shooting scene. That is, when the user selects a shooting scene, the optimum shutter speed, aperture value, etc. are automatically set for the selected shooting scene. Examples of shooting scenes that can be selected by the user include “portrait”, “landscape”, “sports”, “close-up”, and “stage”. In the camera 10 of the present embodiment, when the user selects “stage” as a scene mode for stage shooting, highlight-weighted metering (described later) is set as the metering mode.

The release button 122 is a button that the user presses during shooting. When the user presses the release button 122, the aperture 202 of the lens barrel 200 and the shutter 108 of the camera body 100 are activated, and the subject image is captured by the first imaging unit 102.
The main dial 123 and the sub dial 124 are dials that are operated when the user inputs various mode settings, an aperture value, a shutter speed, an exposure correction value, and the like.

  The selector dial 125 is a switch having electric contacts (not shown) in the four directions of up, down, left and right and in the center. The user can select a desired setting item from a plurality of setting items by operating the selector dial 125. Further, the user can instruct the control unit 103 that the selected setting item has been determined by operating the selector dial 125. The selector dial 125 is mainly used when an operation for changing the shooting conditions displayed on the monitor 105 or the display panel 106, selection of a menu item, or an operation for changing a captured image.

  The photometry mode dial 126 is a dial operated when the user selects a photometry mode. The user can select a desired metering mode by operating the metering mode dial 126. Although not shown in FIG. 2, a pattern indicating each photometry mode is printed around the photometry mode dial 126. The user can select the photometry mode by rotating the photometry mode dial 126 and aligning the indication mark on the dial with the position of the desired photometry mode.

  As metering modes that can be selected by the user, for example, there are spot metering, center-weighted metering, multi-pattern metering, and highlight-weighted metering. Spot metering is a mode in which exposure is determined by metering only the portion overlapping the AF area selected by the user. Center-weighted metering is a mode in which exposure is determined by focusing light on the center of the screen. Multi-pattern metering is a mode in which metering is performed for each of a plurality of areas set on the screen, and final exposure is determined based on information such as luminance distribution, color, distance, and composition of the subject. Highlight-weighted metering is a mode in which exposure is mainly determined so that highlights in the screen have appropriate brightness. The camera 10 of the present embodiment can switch the highlight weighted metering method on and off by operating the metering mode dial 126. The highlight weighted metering will be described later.

  A description will be given with reference to FIG. 1 again. The first imaging unit 102 acquires image data for recording. The first imaging unit 102 is configured by a CMOS image sensor or a CCD image sensor. At the time of shooting, a mirror 107 (described later), a shutter 108 and a diaphragm 202 are operated, so that a subject image formed by the lens 201 is captured by the first imaging unit 102 with exposure controlled by the control unit 103. Image data captured by the first imaging unit 102 is output to the control unit 103.

  The control unit 103 controls the operation of the entire camera 10 to which the lens barrel 20 is attached. The control unit 103 includes a CPU, a memory, and other peripheral circuits (all not shown). Memory constituting the control unit 103 includes SDRAM and flash memory. The SDRAM is a volatile memory. The SDRAM is used as a make memory for expanding data of a program executed by the CPU. The SDRAM is also used as a buffer memory for temporarily storing data used for calculation. The flash memory is a nonvolatile memory. The flash memory stores data of a program executed by the CPU, data read when the program is executed, and the like.

  The control unit 103 performs image processing on the image data output from the first imaging unit 102, and then generates image data in a predetermined image format, for example, JPEG format. Further, the control unit 103 creates display image data, for example, thumbnail image data, based on the generated image data. The control unit 103 generates an image file that includes the generated image data and thumbnail images, and further includes header information, and outputs the image file to the memory card slot 104.

  Further, the control unit 103 is output from the second imaging unit 112 (described later) when highlight weighted metering is selected with the metering mode dial 126 or when the shooting scene “stage” is selected with the mode dial 121. Based on the obtained image data, the exposure is determined according to the procedure of highlight weighted metering processing described later. The control unit 103 has functions as a first calculation unit, a correction unit, and a second calculation unit described later.

  The memory card slot 104 is a slot for inserting a memory card (not shown) as a storage medium. The image file output from the control unit 103 is stored in the memory card in the memory card slot 104.

  The monitor 105 is a color liquid crystal panel disposed on the back surface of the camera body 100 (see FIG. 2). The monitor 105 displays captured images (still images, moving images), images of image files stored in a memory card, various setting menus, and the like.

  The display panel 106 is a monochrome liquid crystal panel disposed on the upper surface of the camera body 100 (see FIG. 2). The display panel 106 mainly displays shooting information such as a shooting mode, a photometry mode, an aperture value, and a shutter speed. The display panel 106 displays the content of the operation performed by the user on the operation unit 101.

  The mirror 107 is a reflecting member provided so as to be movable between a working position interposed in the optical path from the lens 201 to the first imaging unit 102 and a retracted position not interposed in the optical path. The mirror 107 reflects subject light toward the display unit 109 at the operating position shown in FIG.

  The shutter 108 guides subject light to the first imaging unit 102 by opening and closing shutter blades (not shown). The shutter 108 is driven by a shutter control unit (not shown). When the user presses the release button 122, the shutter 108 is driven by the shutter control unit.

  The display unit 109 includes a polymer-dispersed liquid crystal panel and a diffusion screen (both not shown). The subject light guided by the mirror 107 forms an image on the diffusion screen, and the subject image is displayed. For example, a focus point indicating an AF area in focus is displayed on the liquid crystal panel. The image of the focus point displayed on the display unit 109 is superimposed on the subject image formed on the diffusion screen. The light of the subject image superimposed on the image of the focus point is reflected in a prism 110 (described later) and guided to the second imaging unit 112 and the eyepiece unit 113.

The prism 110 and the photometric lens 111 guide the subject image formed on the display unit 109 to the second imaging unit 112 and the eyepiece unit 113.
The second imaging unit 112 acquires image data for photometry. The second imaging unit 112 is configured by a CMOS image sensor or a CCD image sensor. As shown in FIG. 3, the second imaging unit 112 captures subject light in each imaging region of 40 (total number of pixels), and acquires image data in each imaging region. The image data acquired by the second imaging unit 112 is output to the control unit 103. The second imaging unit 112 and the control unit 103 constitute a photometric device in the present embodiment.
The eyepiece unit 113 enlarges and displays the subject image formed on the display unit 109 at a predetermined magnification so that the user can visually recognize it.

  The lens barrel 200 includes a lens 201 and a diaphragm 202 inside. The lens 201 is an imaging optical system that guides subject light to the camera body 100. The lens 201 is composed of a plurality of lenses. In FIG. 1, the lens 201 including a plurality of lenses is represented as one lens. The diaphragm 202 adjusts the amount of subject light that passes through the lens 201 and forms an image on the first imaging unit 102 of the camera body 100.

  Next, the photographing process of the camera 10 will be described. FIG. 4 is a flowchart showing a procedure of basic photographing processing executed by the control unit 103.

  In S11 shown in FIG. 4, the control unit 103 determines whether highlight-weighted photometry is selected. If the determination in S11 is YES, the process proceeds to S12. If the determination in S11 is NO, the process proceeds to S13.

  In S12, the control unit 103 determines the exposure by highlight weighted photometry. Highlight-weighted metering will be described later. In S13, the control unit 103 determines the exposure according to the selected photometry method. In S12 or S13, the exposure is determined based on the exposure control brightness value CtrlBV (described later) calculated by each photometry method.

  In S14, the control unit 103 determines whether or not the release button 122 has been pressed. If the determination in S14 is YES, the process proceeds to S15. If the determination in S14 is NO, the process proceeds to S16.

  In S15, the control unit 103 executes a preset photographing operation. Specifically, the control unit 103 operates the mirror 107, the shutter 108, and the aperture 202, and causes the first imaging unit 102 to capture the subject image formed by the lens 201. The control unit 103 generates an image file based on the image data acquired by imaging and outputs the image file to the memory card slot 104.

  In S16, the control unit 103 determines whether the power is off. If the determination in S16 is YES, the process of this flowchart is terminated. If the determination in S16 is NO, the process returns to S11.

  Next, the highlight weighted photometry process executed as a subroutine in S12 of FIG. 4 will be described. FIG. 5 is a flowchart showing a procedure of highlight weighted photometry processing executed by the control unit 103.

  In S <b> 21 illustrated in FIG. 5, the control unit 103 (first calculation unit) calculates the luminance value (hereinafter also referred to as “output”) of the image data acquired in each imaging region of the second imaging unit 112.

  FIG. 6 is a schematic diagram illustrating an example of an image captured by the second imaging unit 112. FIG. 7A is a schematic diagram illustrating the luminance value in each imaging region of the second imaging unit 112. In the image shown in FIG. 6, the background is dark, and only the person P is spotlighted. Further, extremely high-intensity light L exists near the person P. The imaging area overlapping with the light L is an imaging area having an extremely high luminance value. Therefore, as shown in FIG. 7A, a higher luminance value is calculated in the imaging region overlapping the light L and the surrounding imaging region than the imaging region overlapping the person P as the main subject.

In S <b> 21, the control unit 103 (correction unit) calculates an average output AverageL by the following equation (1) based on the luminance value of each imaging region.

  However, L (i, j) is an output in the imaging region of coordinates (i, j) (see FIG. 3). N is the total number of pixels (40). FIG. 8 is a histogram showing the distribution of luminance values calculated by the control unit 103. In FIG. 8, the average output AverageL is approximately 400.

In S22, the control unit 103 (correction unit) calculates a standard deviation (Sigma) by the following equation (2) based on the luminance value and average output of each imaging region.

In S23, the control unit 103 (correction unit) creates a weighting table based on the standard deviation. The weighting table is used to determine the imaging area where the output is zero. The imaging region where the output is zero is an imaging region having an extremely high luminance value in the screen. The control unit 103 (correction unit) discriminates an imaging region having an extremely high luminance value by using range1 (first luminance range) and range2 (second luminance range). range1 is a luminance range calculated by the following equation (3). range2 is a luminance range calculated by the following equation (4).
range1 = sigma × k_range1 (3)
range2 = sigma × k_range2 (4)

  In Expressions (3) and (4), k_range1 and k_range2 are coefficients set for each product. As shown in FIG. 8, the range of range1 is between AverageL and AverageL + range1. The range of range2 is a range exceeding AverageL + range2.

The control unit 103 (correction unit) compares the output L (i, j) with whether or not the output L (i, j) is larger than range1 or range2, and sets the weight value (WtTable) “1” or “0” according to the result. Set. Specifically, it is set as follows.
If L (i, j) <range1, WtTable (i, j) = 1
If L (i, j)> range2, WtTable (i, j) = 0

In addition, the control unit 103 (correction unit) calculates a weighting value of the imaging region satisfying range1 ≦ L (i, j) ≦ range2 by the following equation (5).
WtTable (i, j)
= L (i, j) -range2 / range1-range2 (5)

  FIG. 7B is a schematic diagram showing a weighting table. As shown in FIG. 7B, the weighting value is set to 1 in the imaging region where the output L (i, j) is less than range1. A weighting value is set to 0 for an imaging region (region of high-intensity light L) whose output L (i, j) exceeds range2. A weighting value is set in accordance with the output L of an imaging region in which the output L (i, j) is not less than range1 and less than range2.

In S24, the control unit 103 (control unit) outputs an output evaluation value according to the following equation (6) based on the output L (i, j) of each imaging region and the weighting values (0 to 1) of the weighting table. LW (i, j) is calculated.
LW (i, j) = L (i, j) × WtTable (i, j) (6)

  FIG. 7C is a schematic diagram illustrating output evaluation values in each imaging region of the second imaging unit 112. As shown in FIG. 7C, the output is 0 in the imaging area in which the weighting value is set to 0. The imaging area whose output is 0 is an imaging area exceeding range 2 in the histogram shown in FIG. Specifically, in FIG. 6, in the imaging area overlapping with the high-intensity light L and the surrounding imaging area, all outputs are 0 in the output evaluation value regardless of the original output. Therefore, in S21, it is possible to reduce the influence of the high luminance value calculated in the extremely high luminance imaging region and the surrounding imaging region.

In S25, the control unit 103 (second correction unit) extracts the maximum value (Max_LW) from the output evaluation value LW (i, j) calculated in S23.
In S <b> 26, the control unit 103 (second correction unit) calculates the maximum luminance value Max_BVW by logarithmically converting the maximum value Max_LW of the output evaluation value according to the following equation (7).
Max_BVW = Log ₂ (Max_LW) + BvOffset (7)
However, BvOffset is a coefficient for converting the output evaluation value into a luminance value.

In S27, the control unit 103 (second correction unit) calculates the exposure control luminance value CtrlBV by substituting the maximum luminance value Max_BVW in the screen into the following equation (8).
CtrlBV = Max_BVW + MaxOfs (8)
However, MaxOfs is an adjustment value set according to the luminance of the subject.

The control unit 103 determines the exposure based on the calculated brightness value CtrlBV for exposure control, and ends the process of this flowchart (returns to the main routine of FIG. 4).
Therefore, according to the highlight weighted metering of the present embodiment, when the background is dark on the stage and the spotlight is applied only to a person, the scene is such that extremely bright light exists in the background. However, since the exposure does not undershoot due to the influence of the high-intensity light, the human face can be reproduced with appropriate brightness.

  In FIG. 6, when there is no extremely high-intensity light L, the weighting value of the imaging region in which the weighting value is set to 0 in FIG. 7B is set to 1 (or a value close to 1). Is done. Also in this case, since the exposure is appropriately controlled based on the output of the highlight portion (imaging area where the person exists), the face of the person can be reproduced with appropriate brightness as described above.

According to the camera 10 of this embodiment mentioned above, there exist the following effects.
(1) The camera 10 of the present embodiment reduces the output of an extremely high-brightness imaging region in the screen and calculates an exposure control luminance value based on the outputs of the remaining imaging regions. According to this, even if extremely high-luminance light is present in the screen, the exposure is determined so that the highlight portion has appropriate brightness. Therefore, according to the camera 10 of the present embodiment, more stable exposure control can be performed while giving priority to the highlight portion in the screen.

(2) The camera 10 of the present embodiment calculates a standard deviation based on the average output of each imaging area, and calculates a weighting value of the imaging area that has a luminance value higher than the luminance range set based on the standard deviation. Set to 0. According to this, even if the brightness value is the same, if the brightness value is higher than the set brightness range, the output is reduced, and if it is within the brightness range, it is determined as a highlight portion. Therefore, appropriate exposure control can be performed according to the size of the luminance value in the imaging area, the ratio of the high-luminance imaging area in the screen, and the like.

(3) The camera 10 of the present embodiment sets the first luminance range and the second luminance range having a higher luminance based on the calculated standard deviation, and the luminance value is included in the first luminance range. The weighting value of the imaging region is set to 1, and the weighting value of the imaging region whose luminance value exceeds the second luminance range is set to 0. According to this, not only the imaging area overlapping with extremely high-luminance light but also the surrounding imaging area is reduced according to the luminance value. Therefore, more appropriate exposure control can be performed in accordance with the distribution of the high-luminance imaging region existing in the screen.

(4) In the camera 10 of the present embodiment, when the user selects “stage” as the scene mode for stage shooting, highlight-weighted photometry is set as the photometry mode. According to this, since the user can set the photometry mode most suitable for the scene only by setting “stage” as the scene mode, it is excellent in usability.

The present invention is not limited to the embodiment described above, and various modifications and changes as shown below are possible, and these are also within the scope of the present invention.
In the present embodiment, an example in which the imaging apparatus according to the present invention is applied to a digital single-lens reflex camera has been described. The present invention is not limited to this, and the imaging apparatus according to the present invention can also be applied to a camera that does not include a mirror, a finder optical system, and the like. In this case, the imaging unit that acquires image data for recording functions as an imaging unit that acquires image data for photometry.

  In the present embodiment, an example in which MaxOfs of Expression (8) is set to a fixed value has been described. Not limited to this, the operation unit 101 may be configured to select a plurality of MaxOfs. With such a configuration, the user can correct the exposure control luminance value CtrlBV according to the brightness of the subject, and thus can reproduce the brightness according to the shooting intention.

  In the present embodiment, an example in which a weighting value is set according to the output of an imaging region in which the output L is greater than or equal to range1 and less than range2 has been described. However, the present invention is not limited to this, and the weighting value of the imaging area may be changed according to the imaging area where the output L exceeds range2 or the distance to the main subject.

  In this embodiment, the “stage” has been described as an example of the shooting scene applied to highlight weighted metering. Not limited to this, the highlight weighted metering according to the present embodiment is also suitable for a sunset scene, a night scene, a scene in which strong forward light is irradiated on a subject, and the like.

  Moreover, although the said embodiment and modification can be used in combination suitably, since the structure of each embodiment is clear by illustration and description, detailed description is abbreviate | omitted. Furthermore, the present invention is not limited by the embodiment described above.

  DESCRIPTION OF SYMBOLS 10: Camera, 100: Camera main body, 101: Operation part, 102: 1st imaging part, 103: Control part, 112: 2nd imaging part, 121: Mode dial, 126: Metering mode dial, 200: Lens barrel

Claims (10)

An imaging unit that captures subject light in a plurality of imaging regions and acquires image data of each imaging region;
A first calculation unit that calculates a luminance value of each imaging region from the image data acquired in each imaging region;
A correction unit that performs correction to reduce the luminance value of the imaging region that meets a preset condition;
A second calculation unit that calculates a brightness value for exposure control based on the brightness value of the brightest imaging region among the plurality of corrected imaging regions;
A photometric device comprising: The photometric device according to claim 1,
The correction unit averages the luminance value of each imaging region calculated by the first calculation unit, calculates a standard deviation thereof, and sets an imaging region that conforms to a preset condition based on the standard deviation. Correction is performed so that the brightness value becomes 0 for an imaging region that has a brightness value higher than the set brightness range.
Photometric device. The photometric device according to claim 2,
The correction unit sets a first luminance range and a second luminance range having a higher luminance than the first luminance range based on the standard deviation, and an imaging region in which a luminance value is included in the first luminance range The weighting value of 1 is set to 1, and the weighting value of the imaging area whose luminance value exceeds the second luminance range is set to 0, and the luminance value of each imaging area is corrected.
Photometric device. The photometric device according to claim 3,
The correction unit sets a weighting value of an imaging region whose luminance value exceeds the first luminance range and is equal to or lower than the second luminance range according to the luminance value of the imaging region.
Photometric device. In the photometric device according to any one of claims 1 to 4,
The second calculation unit calculates the exposure control luminance value using a luminance value of the brightest imaging region among the plurality of corrected imaging regions and an adjustment value set according to the luminance of the subject. ,
Photometric device. In the photometry apparatus in any one of Claim 1 to 5,
The imaging unit obtains image data for recording;
Photometric device. In the photometry apparatus in any one of Claim 1 to 5,
Acquiring image data for recording by another imaging unit different from the imaging unit;
Photometric device.   An imaging apparatus comprising the photometric device according to claim 1. The imaging device according to claim 8,
Turn on the metering method that calculates the brightness value for exposure control based on the brightness value of the brightest imaging area among the corrected imaging areas while reducing the brightness value of the imaging area that meets the preset conditions. Configured to switch off,
Imaging device. The imaging device according to claim 9,
A scene mode for stage shooting is configured to be selectable, and when the scene mode for stage shooting is selected, the photometry method is set to ON.
Imaging device.

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