JP4760742B2 - Digital camera, information display method, and information display control program - Google Patents

Description

  The present invention relates to a digital camera, an information display method, and an information display control program for displaying information related to the brightness of a subject on a screen.

  2. Description of the Related Art Conventionally, some digital cameras that capture an image of a subject using an image sensor such as a CCD or CMOS and record the captured image on a recording medium such as a memory card have a liquid crystal monitor for image display that functions as a viewfinder during shooting. It is common. In such a digital camera, normally, when the shooting (recording) mode is set, not only a subject image (hereinafter referred to as a through image) but also subject information and the like can be displayed on the liquid crystal monitor. Many of them can display a histogram showing the distribution of brightness (the distribution of the number of pixels by luminance).

In this regard, for example, in Patent Document 1 below, the above histogram is displayed for each of R, G, and B colors so that the user can objectively check the white balance state, and a predetermined histogram target set within the angle of view. A technique for displaying the brightness distribution of only a region (for example, a human face) is described.
JP 2004-172817 A

  However, the above technique is effective in that it can provide objective white balance information to the user, but has the following problems regardless of whether the histogram is different in color.

  That is, in the above technique, even if the histogram target area can be changed, if the photographer wants to check the brightness state of different areas within the angle of view, the histogram target area is moved or changed one by one. Therefore, the operation is complicated and the confirmation work takes time. In addition, there is a problem that it is inconvenient when it is desired to check the brightness balance of a plurality of areas.

  The present invention has been made in view of such a conventional problem, and provides a digital camera, an information display method, and an information display control program for improving convenience when a photographer confirms the brightness of a plurality of areas of a subject. The purpose is to provide.

In order to solve the above-described problem, the digital camera according to the first aspect of the present invention displays an image captured by an image sensor on a display unit, and records the image as image data in a recording unit at the time of shooting. in the information acquisition means for acquiring predetermined brightness information respectively indicating brightness of a plurality of regions of an image captured by the imaging element, the brightness information of the plurality of areas acquired by the information acquisition means, the plurality Display control means for displaying on the display means by superimposing on the image in a state corresponding to the area, and automatically controlling the exposure value at the time of photographing based on the brightness information of the plurality of areas acquired by the information acquisition means Exposure control means, exposure correction means for correcting an exposure value at the time of shooting targeted by the exposure control means according to a user's request, and the information Determination means for determining the occurrence of blackout or overexposure for each of the plurality of areas based on histogram information indicating the distribution state acquired from the brightness information of the plurality of areas acquired by the acquiring means; Correction value calculation means for calculating an exposure correction value necessary for eliminating blackout or overexposure in the area, for each area determined to have blackout or overexposure by the determination means; and The exposure correction value calculated by the correction value calculation means is superimposed on the image and displayed on the display means in a state corresponding to the area where the determination means determines that blackout or overexposure has occurred. And a second display control means .

Further, in the digital camera according to the second aspect of the invention, the information acquiring unit acquires histogram information indicating a distribution of brightness in the plurality of areas of the image as the predetermined brightness information, the The determining means determines whether blackout or overexposure has occurred for each of the plurality of areas based on the histogram information acquired by the information acquisition means .

Further, in the digital camera according to the invention of claim 3 , the information acquisition means acquires predetermined brightness information respectively indicating brightness of a plurality of areas obtained by dividing the image into a plurality of areas. To do.

According to a fourth aspect of the present invention, in the digital camera according to the fourth aspect of the invention, the information acquisition unit acquires predetermined brightness information indicating the brightness of a plurality of regions that are separated from each other in the image. .

In the digital camera according to the fifth aspect of the present invention, the information acquisition means is a plurality of focus detection areas that are separated from each other in an image captured by the image sensor and are used for focus detection. Predetermined brightness information indicating the brightness of each region is acquired.

In the information display method according to the sixth aspect of the present invention, an object captured by a digital camera that displays an image picked up by an image pickup device on a display unit and records the image as image data in a recording unit at the time of shooting. An information display method for displaying information relating to brightness of the image, the step of obtaining predetermined brightness information respectively indicating the brightness of a plurality of areas of the image captured by the imaging device, and the brightness of the acquired plurality of areas The exposure value at the time of shooting is automatically controlled based on the step of displaying the information on the display unit by superimposing the information on the image in a state corresponding to the plurality of regions, and the acquired brightness information of the plurality of regions. Based on the process, the step of correcting the exposure value at the time of shooting as a control target according to the user's request, and the blackout for each of the plurality of areas based on the acquired brightness information of the plurality of areas Steps for determining the presence or absence of overexposure, and exposure correction values necessary to eliminate the overexposure or overexposure in each area where it is determined that the overexposure or overexposure has occurred And the calculated exposure correction value is displayed on the display unit so as to be superimposed on the image in a state corresponding to the area where blackout or overexposure is determined by the determination unit. And a step of causing the step to occur.

The information display control program according to the invention of claim 7 is provided in a digital camera that displays an image picked up by the image pickup device on the display means and records the image on the recording means as image data at the time of photographing. In a state where the computer acquires predetermined brightness information indicating the brightness of each of the plurality of areas of the image captured by the image sensor, and the acquired brightness information of the plurality of areas is associated with the plurality of areas. A procedure for superimposing the image on the display and displaying on the display means, a procedure for automatically controlling an exposure value at the time of shooting based on the acquired brightness information of the plurality of areas, and an exposure value at the time of shooting as a control target Based on the procedure for correcting the image according to the user's request and the acquired brightness information of the plurality of areas, the presence / absence of blackout or overexposure is determined for each of the plurality of areas. For each area where blackout or overexposure has been determined by the order and the determination, a procedure for calculating the exposure correction value necessary to eliminate the underexposure or overexposure of the area and A step of causing the display unit to display an exposure correction value superimposed on the image in a state corresponding to an area where blackout or overexposure is determined by the determination unit. And

  As described above, according to the present invention, it is possible to improve convenience when a photographer confirms the brightness of a plurality of areas of a subject in a shooting standby state.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a block diagram showing an electrical configuration of a digital camera 1 according to the present invention. The digital camera 1 has a general basic configuration with AE (automatic exposure) and AF (autofocus) functions, and includes a CPU 2 that controls the entire system and the following components. Yes.

  In the figure, a lens block 3 is a block showing a driving mechanism of an optical system including a zoom lens and a focus lens, and a motor driver 5 for controlling driving of a motor 4 which is a driving source thereof is connected to the CPU 2 via a bus 6. Connected with. Then, zoom magnification adjustment and focus adjustment are performed by moving the optical system in the optical axis direction based on a control signal from the CPU 2. Although not shown in the drawing, the lens block 3 includes an aperture and an actuator that changes its opening based on a control signal from the CPU 2.

  The digital camera 1 has a CCD 7 as an image pickup device, and the CCD 7 is driven by a vertical / horizontal driver 9 based on a timing signal generated by a timing generator (TG) 8 according to a command of the CPU 2, and the optical system described above. The optical image of the subject formed by the above is photoelectrically converted and output to the analog signal processing unit 10 as an imaging signal.

  The analog signal processing unit 10 includes a CDS circuit that removes noise included in the output signal of the CCD 7 by correlated double sampling, an A / D converter that converts the imaging signal from which noise has been removed to a digital signal, a gain adjustment amplifier, and the like. The imaging signal converted to digital is output to the image processing unit 11.

  The image processing unit 11 performs pixel interpolation and RGB data (RAW data) generation for each pixel from the input imaging data (Bayer data), and then outputs the luminance (Y) and color difference (Cb, Cr). Data is converted to YUV data. At that time, digital signal processing such as white balance adjustment by gain adjustment of Cb, Cr (R, B data) may be performed in accordance with a command from the CPU 2.

  Further, when the brightness check mode to be described later is set, the image processing unit 11 determines the distribution state of the number of pixels for each luminance level based on the luminance information for each pixel in the YUV data, that is, in the image according to the instruction of the CPU 2. Histogram data (details will be described later) indicating brightness distribution is acquired and sent to the CPU 2 to function as information acquisition means of the present invention.

  On the other hand, the YUV data generated by the image processing unit 11 in the recording mode for photographing is sequentially stored in the SDRAM 12 and converted into a video signal every time one frame of data (image data) is accumulated. Is displayed as a through image on a liquid crystal monitor (LCD) 13 as a display means.

  Further, at the time of shooting when the shutter key is pressed, image data (YUV data) temporarily stored in the SDRAM 12 is compressed by the CPU 2 and temporarily stored in a buffer area in the SDRAM 12, and finally, a predetermined value such as JPEG is used. It is recorded in the external memory 14 as a format image file.

  The external memory 14 is a memory card that can be attached to and detached from the camera body connected via a card interface (not shown). The image file recorded in the external memory 14 is read out and expanded by the CPU 2 in accordance with the user's selection operation in the reproduction mode, expanded on the SDRAM 12 as YUV data, and then displayed on the liquid crystal monitor 13.

  The flash memory 15 constitutes the recording means of the present invention together with the external memory 14, and the flash memory 15 stores a file of an image taken without the external memory 14 (memory card) attached. An image storage area and a program area in which various programs necessary for the operation of the digital camera 1 are stored are secured.

  The CPU 2 performs the above-described control of each unit, AE control, AF control, and the like based on various programs stored in the program area, thereby obtaining the information acquisition means, display control means, and exposure control means of the present invention. , Function as exposure correction means.

  The program area of the flash memory 15 stores various data such as a program diagram used for the AE control of the CPU 2, and is a digital camera that is set according to a setting operation by the user or automatically. Various setting data relating to the operation of 1 are also stored.

  The key input unit 16 includes operation keys such as a power key, a shutter key, a mode switch, a menu key, a display key, a control key, and a set key. A control key is a key that is generally provided in a digital camera that can indicate four directions, up, down, left, and right. Selection of setting items and setting contents on a menu screen displayed on the liquid crystal monitor 13 by pressing the menu key Used for. The set key is used for determining a selection state of setting items and setting contents. The key operation state in the key input unit 16 is sequentially scanned by the CPU 2, and when one of the operation keys is operated by the user, the operation content is detected by the CPU 2.

  Next, the operation of the digital camera 1 having the above configuration will be described. FIG. 2 shows the present invention executed by the CPU 2 when a recording mode with a brightness confirmation function (hereinafter referred to as brightness confirmation mode) provided as a lower mode of the recording mode in the digital camera 1 is selected by the user. It is the flowchart which showed the content of the process which concerns on.

  As shown in the drawing, the CPU 2 starts AE control and AF control in accordance with the setting of the brightness confirmation mode (step S1). Here, in the AE control performed in the brightness confirmation mode, the angle of view is divided into a plurality of photometric areas (divided areas) 31a to 31e as shown in FIG. This is a multi-pattern photometry method in which (luminance) is detected and proper exposure is determined based on the detection result.

  In addition, the AF control integrates the amount of the high frequency component in the imaging signal output from the CCD 7 for a certain period (for example, one field period) and sets the value as the AF evaluation value. This is a contrast AF method in which focusing is performed by moving it. However, in that case, in parallel with the AF evaluation value, the AF evaluation values for each of the plurality of focus detection areas 32a to 32e shown in FIG. And the focus lens position where it was the largest is stored for each area. The focus detection areas 32a to 32e are areas where the user can select one of them when shooting in a mode other than the brightness confirmation mode. In the AF control in that case, the focus detection areas 32a to 32e are selected. The AF evaluation value described above is acquired only for the area.

  Then, after starting the AE control and the AF control (actually at the same time), the CPU 2 starts the imaging operation by the CCD 7, and every time the imaging timing at a predetermined slew rate (for example, 30 frames / second) arrives (step) (YES in S2), an imaging process (capturing a subject image) is performed (step S3), and the captured subject image is displayed on the liquid crystal monitor 13 as a through image (step S4).

  Subsequently, at that time, it is stored as an operation parameter in the program area of the flash memory 15, and the type of brightness information to be displayed on the through image is confirmed (step S5). In this embodiment, there are two types of brightness information, “histogram” and “EV value”, and “histogram” is stored as an initial value.

  Then, when the type of brightness information is “histogram” as in the beginning of the operation (YES in step S5), the image processing unit 11 acquires histogram data for each of the above-mentioned photometric areas 31a to 31e (step S6). ). That is, for each of the photometric areas 31a to 31e, the luminance values of all the pixels in the area are confirmed, and the number of pixels for each luminance is acquired. Thereafter, a histogram for each photometric area based on the histogram data is displayed at a predetermined position corresponding to each photometric area 31a to 31e on the through image displayed on the liquid crystal monitor 13 (step S7). The histogram 41 is displayed by a well-known OSD function.

  FIG. 4A is a diagram illustrating an example of a state in which histograms 41 a to 41 e for each photometric area are displayed on the through image 100. In the present embodiment, when displaying the histograms 41a to 41e, partition lines (broken lines in the figure) indicating the photometric areas 31a to 31e are displayed on the through image 100 as shown, and histograms 41a to 41e are displayed below each area. Is displayed. Note that the actual display of the histograms 41a to 41e ensures the visibility of the through image 100 (subject) by making them translucent. Thus, the user, that is, the photographer, can simultaneously check the brightness distribution state for different areas within the angle of view without performing the work of switching the area for which the brightness is desired.

  Thereafter, the CPU 2 updates the through image 100 and the histograms 41a to 41e by repeating the processes of steps S3 to S7 every time the frame timing arrives (YES in step S2).

  In the meantime, that is, in the shooting standby state, the above-described brightness information switching and EV shift (manual correction of the exposure value under AE control) by the photographer are possible, and the CPU 2 is operated by a predetermined key operation. If there is an EV shift operation (YES in step S8), the exposure value (EV value) determined by AE control accordingly is within a predetermined allowable range (for example, -2.0 EV to +2.0 EV). Correction is performed (step S9). At this time, the correction result is reflected in the YUV data generated in the image processing unit 11.

  Thereafter, the histograms 41a to 41e in the above-described through image 100 are updated by the processes in steps S5 to S7 described above. Thereby, when the EV shift to the plus side is performed by the photographer, the brightness distribution area in each of the histograms 41a to 41e moves to the right side, and conversely, when the EV shift to the minus side is performed. , It will move to the left side.

  Therefore, the photographer performs EV correction while comparing the histograms 41a to 41e for each photometry area, for example, not only the brightness of the area that he considers important within the angle of view (inside the subject) but also the area and other areas. EV correction can be performed in consideration of the brightness balance with the area. In addition, since it is not necessary to switch the region for which the brightness is desired, it is possible to obtain a desired image without missing a photo opportunity.

  Further, in the shooting standby state where the through image 100 and the histograms 41a to 41e are sequentially updated as described above, the CPU 2 performs the above-described brightness information switching operation by the photographer (steps S2 and S8). Are NO and YES in step S10), the brightness information setting is switched from “histogram” to “EV value” (step S11).

  In this case, since the determination result in step S5 described above is NO, in the above-described plurality of focus detection areas 32a to 32e (FIG. 3B), it is possible to determine that the focus is achieved, that is, in AF control. Based on the luminance information of the specific area corresponding to the focus detection area where the acquired focus lens position is substantially equal to the focus lens position actually controlled at that time (the difference is within the threshold), the aperture at that time The EV value indicating the brightness of the specific area is calculated from the value, the exposure time of the CCD 7, and the gain of the imaging signal (corresponding to ISO sensitivity) (step S12). Thereafter, the calculated EV value is displayed on the through image together with the focus frame indicating the focus detection area currently in use (step S13).

  FIG. 4B is a diagram exemplifying a display screen on the liquid crystal monitor 13 when the three focus detection areas 32c to 32e shown in FIG. 3B are in focus. As described above, the focus frames 51 a to 51 c indicating the focus detection areas 32 c to 32 e and the EV value for each focus detection area are displayed on the through image 100. Note that the focus frames 51a to 51c and the EV value are also displayed by the OSD function similarly to the histogram.

  Thereafter, every time the frame timing arrives (YES in step S2), the CPU 2 updates the through image 100 and the focus frame and the EV value displayed in an overlapping manner by the processes of steps S3 to S5, S12, and S13. Thus, the photographer can simultaneously check the brightness distribution state for different areas within the angle of view without performing the operation of switching the area for which the brightness is desired.

  Even in the shooting standby state, if there is an EV shift operation by the photographer, the exposure value (EV value) determined by the AE control is corrected accordingly, and the correction result is generated in the image processing unit 11. This is reflected in the YUV data (YES in step S8, step S9).

  Therefore, the photographer performs EV correction while comparing the EV values of a plurality of areas where the focus frames 51a to 51c are displayed, so that, for example, only the brightness of the area that he considers important within the angle of view (within the subject). In addition, EV correction can be performed in consideration of the brightness balance between the area and other areas. In addition, since it is not necessary to switch the region for which the brightness is desired, it is possible to obtain a desired image without missing a photo opportunity.

  Thereafter, the CPU 2 repeats the above-described processing to switch the brightness information displayed on the through image 100 between the histogram and the EV value every time the photographer performs a brightness information switching operation, and also performs an EV shift operation. Accordingly, the exposure value (EV value) by the AE control is corrected.

  As described above, in the present embodiment, by using the brightness check mode described above, the photographer can easily check the brightness of a plurality of areas of the subject without being forced to perform complicated operations. .

(Embodiment 2)
Next, a second embodiment of the present invention will be described. In the present embodiment, in the brightness check mode described above, the CPU 2 performs the process shown in FIG. 5 in place of the process in step S7 in FIG. By functioning as a second display control unit, histograms 41a to 41e, a caution message 51, and a recommended EV correction value 52 as shown in FIG. 6 are displayed on the through image.

  That is, in this embodiment, as shown in FIG. 5, after the histogram data is acquired for each photometric area 31a to 31e by the image processing unit 11 in step S6 described above, the following processing is performed for each photometric area.

  First, on the basis of the histogram data, the photometry area is checked for the presence or absence of “whiteout” or “blackout” in sequence, and when “whiteout” occurs (YES in step S701), it is displayed on the liquid crystal monitor 13. A histogram based on the histogram data is displayed in the photometric area on the live view image with the background color set to “white” (step S702), and the photographer is further informed that “whiteout” has occurred. A notice message 51 to notify is displayed (step S703).

  Subsequently, an EV correction value necessary to eliminate (eliminate) the overexposure in the photometry area is calculated (step S704), and the calculation result is displayed as the recommended EV correction value 51 together with the caution message or the like (step S705). ).

  Further, when “blackout” occurs (NO in step S701, YES in step S706), a background color is displayed on the histogram based on the histogram data in the photometric area on the through image displayed on the liquid crystal monitor 13. It is displayed in the state of “brown” (step S707), and further, a caution message 51 is displayed to inform the photographer that “blackout” has occurred (step S708).

  Subsequently, an EV correction value necessary for eliminating (eliminating) “blackout” in the photometry area is calculated (step S709), and the calculation result is displayed as the recommended EV correction value 52 together with the caution message or the like ( Step S704).

  When neither “whiteout” nor “blackout” occurs (NO in both steps S701 and S706), a histogram based on the histogram data is displayed in the photometric area on the through image displayed on the liquid crystal monitor 13. The background color is displayed in a state of “intermediate color” (for example, light gray between white and brown) (step S710).

  Then, the above process is repeated for all the photometric areas, and when this is completed, the process returns to step S2 in FIG.

  FIG. 6 shows, for convenience, the histograms 41a to 41e for each photometric area displayed on the through image 100 when “histogram” is set as the type of brightness information described above. FIG. 5 is a diagram corresponding to FIG. 4A in a state where a through image is omitted.

  As a result, the photographer can not only check the brightness distribution state for different areas in the angle of view at the same time without switching the area for which the brightness is desired, but also “overexposure” or “blackout”. It is possible to instantly grasp the region where the occurrence of the error occurs based on the difference in background color from the other histograms.

  In addition, since the recommended EV correction value 52 is also displayed for an area where “whiteout” or “blackout” has occurred, even if the photographer does not have detailed knowledge about exposure correction, that area Exposure correction suitable for the above can be easily performed. In addition, in the present embodiment, by displaying the above-described caution message 51, it is possible to reliably notify the user who is unfamiliar with the digital camera 1 of the presence of a region where “whiteout” or “blackout” has occurred.

  In this embodiment, the background color of the histogram of the photometry area where “whiteout” occurs and the background color of the histogram of the photometry area where “blackout” occur are different from each other. However, the background color of both histograms may be the same color. In short, it is only necessary to display the histogram of the photometry area where “whiteout” or “blackout” has occurred and the histogram of the other photometry areas in different forms. Even in such a case, it is more convenient than the first embodiment in that it is possible to intuitively know at least an area where “whiteout” or “blackout” occurs.

  Here, the present invention is not limited to those shown in the first and second embodiments described above, and may be as follows.

  That is, unlike the present embodiment, for example, when the type of brightness information to be displayed on the through image is set in the histogram, a histogram indicating the brightness distribution of the focus detection areas 32a to 32e in the image is displayed on the through image. When the type of brightness information to be displayed and displayed on the through image is set to an EV value, an EV value indicating the brightness of each of the photometry areas 31a to 31e may be displayed.

  In addition, when displaying EV values and histograms for the focus detection areas 32a to 32e on the through image, not only the focus detection area that can be determined to be in focus but also all the focus detection areas 32a to 32e, Each EV value and histogram may be displayed.

  In addition, the brightness of a plurality of areas of the subject such as the photometry areas 31a to 31e and the focus detection areas 32a to 32e is displayed as a histogram or an EV value. If the information is related to brightness, other information (brightness information) is displayed. You may make it display on a through image. For example, on the gauge corresponding to the horizontal axis of the histogram, a mark indicating the brightness (average brightness, etc.) of a plurality of areas of the subject corresponding to each of the above areas may be displayed.

  Further, the AF control performed in the brightness confirmation mode is not performed based on the AF evaluation value acquired for the entire image as described above, but, for example, a plurality of focus detection areas 32a to 32 shown in FIG. You may make it perform based on AF evaluation value acquired only for 32e.

  Further, when EV values for a plurality of photometric areas 31a to 31e and a plurality of focus detection areas 32a to 32e are displayed on a through image, the following may be performed.

  For example, as shown in FIG. 7, for each area (focus frames 51 a to 51 c) for displaying EV values, shooting parameters that can obtain an appropriate gradation expression for a subject portion in the area during actual shooting, that is, A photographing condition table 201 showing a combination of IOS sensitivity, F value (aperture value), and shutter speed is displayed together with the EV value. Then, when a photographer performs a predetermined key operation, a photographing condition to be used for photographing is selected from a plurality of photographing conditions (combination of photographing parameters) indicated in the photographing condition table 201 of a desired area. You may be able to do it.

  FIG. 7 is a diagram corresponding to FIG. 4B in a state where the through image is omitted, showing a modification of the above-described embodiment, and photographing the focus detection area (51c) at the lower right in the screen. This is an example in which a certain shooting condition (ISO sensitivity: 200, F value: 2.8, shutter speed: 1/2000) shown in the condition table 201 is selected.

  In the above description, the case where the present invention is applied to a general digital camera 1 has been described. However, the present invention is naturally applicable to a digital camera incorporated in another information device such as a mobile phone terminal. It is.

It is a block diagram of the digital camera common to each embodiment of this invention. It is a flowchart which shows the processing content which concerns on this invention of CPU in 1st Embodiment. (A) is a figure which shows the photometry area at the time of AE control, (b) is a figure which shows the focus detection area at the time of AF control. It is a figure which shows an example of the display screen of the liquid crystal monitor in brightness confirmation mode. It is a flowchart which shows the processing content which concerns on this invention of CPU in 2nd Embodiment. It is a figure corresponding to Drawing 4 (a) which shows an example of a display screen of a liquid crystal monitor in the embodiment. It is a figure corresponding to FIG.4 (b) which shows an example of the display screen of the liquid crystal monitor in a modification.

Explanation of symbols

1 Digital camera 2 CPU
7 CCD
DESCRIPTION OF SYMBOLS 11 Image processing part 13 Liquid crystal monitor 14 External memory 15 Flash memory 31a-31e Photometry area 32a-32e Focus detection area 32c-32e Focus detection area 41 Histogram 41a-41e Histogram 51a-51c Area mark 100 Through image

Claims (7)

In a digital camera that displays an image captured by an image sensor on a display unit and records the image as image data in a recording unit at the time of shooting.
Information acquisition means for acquiring predetermined brightness information respectively indicating the brightness of a plurality of regions of an image captured by the image sensor;
The brightness information of the plurality of areas acquired by the information acquisition means, display control means for displaying on the display means by superimposing on the image in a state of being associated with the plurality of regions,
Exposure control means for automatically controlling an exposure value at the time of photographing based on brightness information of a plurality of areas acquired by the information acquisition means;
Exposure correction means for correcting the exposure value at the time of shooting, which is the control target of the exposure control means, according to a user's request;
Based on the brightness information of the plurality of areas acquired by the information acquisition means, a determination means for determining whether blackout or overexposure occurs for each of the plurality of areas;
A correction value for calculating an exposure correction value necessary for eliminating the blackout or overexposure of the area for each area that is determined by the determination means to be blackout or overexposure among the plurality of areas. Computing means;
The exposure correction value calculated by the correction value calculation means is displayed on the display means by superimposing the exposure correction value on the image in a state corresponding to the area where blackout or overexposure is determined by the determination means. And a second display control means . The information acquisition means acquires histogram information indicating brightness distribution states in a plurality of regions of the image as the predetermined brightness information,
The digital camera according to claim 1 , wherein the determination unit determines whether blackout or overexposure has occurred for each of the plurality of regions based on the histogram information acquired by the information acquisition unit . It said information obtaining means, according to claim 1 or 2 SL placing the digital camera and obtains the predetermined brightness information indicating brightness of each of the plurality of areas obtained by dividing the image into a plurality. It said information obtaining means, according to claim 1 or 2 SL placing the digital camera and obtains the predetermined brightness information indicating brightness of the plurality of regions each spaced apart from each other in the image. The information acquisition means acquires predetermined brightness information indicating the brightness of each of a plurality of focus detection areas, which are areas separated from each other in an image captured by the image sensor, and are used for focus detection. The digital camera according to claim 4, characterized in that: An information display method for displaying information about the brightness of a subject in a digital camera that displays an image captured by an image sensor on a display unit and records the image as image data in a recording unit at the time of shooting,
Obtaining predetermined brightness information indicating the brightness of each of a plurality of regions of an image captured by the image sensor;
A step of superimposing the acquired brightness information of the plurality of areas on the image in a state corresponding to the plurality of areas and displaying the information on the display means ;
Automatically controlling the exposure value at the time of shooting based on the acquired brightness information of the plurality of areas;
Correcting the exposure value at the time of shooting as a control target according to the user's request;
Determining the occurrence of blackout or overexposure for each of the plurality of areas based on the acquired brightness information of the plurality of areas;
Calculating an exposure correction value necessary for eliminating blackout or overexposure of the area for each area determined to have blackout or overexposure by determination;
A step of superimposing the calculated exposure correction value on the image in a state corresponding to an area where blackout or overexposure has been determined by the determination unit and displaying on the display unit. An information display method characterized by the above. A computer having a digital camera that displays an image captured by the image sensor on the display unit and records the image as image data in the recording unit at the time of shooting.
Obtaining predetermined brightness information indicating the brightness of each of a plurality of areas of an image captured by the image sensor;
A procedure for superimposing the acquired brightness information of a plurality of areas on the image in a state corresponding to the plurality of areas and displaying the information on the display means ;
Based on the acquired brightness information of multiple areas, a procedure for automatically controlling the exposure value at the time of shooting,
A procedure for correcting the exposure value at the time of shooting as a control target according to the user's request,
A procedure for determining the occurrence of blackout or overexposure for each of the plurality of areas based on the acquired brightness information of the plurality of areas;
A procedure for calculating an exposure correction value necessary for eliminating blackout or overexposure of the area for each area determined to have blackout or overexposure by determination;
Causing the calculated exposure correction value to be superimposed on the image and displayed on the display unit in a state corresponding to an area where the determination unit determines that blackout or overexposure has occurred . An information display control program characterized by that.

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