JP4489274B2 - Digital camera and control method thereof, and image output apparatus and method - Google Patents

Description

[0001]
【Technical field】
The present invention relates to a digital camera, a control method therefor, and an image output apparatus and method.
[0002]
BACKGROUND OF THE INVENTION
The subject image obtained by shooting may be too dark or too bright if the image is taken with reference to the bright or dark part, even if part of the shooting area is bright or dark. In a digital camera, the exposure is adjusted so that the average brightness is a desirable level. Therefore, if a part of the subject image is cut out after shooting, the cut-out image may be dark or bright.
[0003]
Further, when shooting a subject, the focus is adjusted so that the main subject in the imaging area has a desired size. When the main subject image is enlarged during reproduction, electronic zoom processing is performed on the main subject image. Since the electronic zoom is realized by pixel interpolation, the image quality of the electronic zoomed image is often not so good.
[0004]
In any case, if a part of the subject image is cut out after shooting, the brightness of the cut out part is not appropriate, the size of the main subject in the cut out part is not appropriate, and electronic zoom is necessary, etc. The image quality is often degraded.
[0005]
DISCLOSURE OF THE INVENTION
An object of the present invention is to obtain a partial image with good image quality even when a part of a subject image is cut out after shooting. It is another object of the present invention to provide a digital camera that records data representing a photometric value for each region obtained by dividing a subject image on a recording medium together with image data in order to obtain such a partial image with good image quality.
[0006]
The digital camera according to the first aspect of the invention measures the light for each divided section obtained by dividing the imaging region into a plurality of sections, detects the photometric value, images the subject, and outputs the image data representing the subject image Imaging means, exposure control means for controlling an exposure amount in the imaging means based on a photometric value detected by the photometry means, image data output from the imaging means, and division output by the photometry means It is characterized by comprising a recording control means for associating data representing a photometric value for each area with each other and recording it on a recording medium.
[0007]
The first invention also provides a control method suitable for the camera. That is, in this method, photometry is performed for each of the divided sections obtained by dividing the imaging region into a plurality of sections, a photometric value is obtained, and the subject is imaged with the exposure amount in the imaging means based on the obtained photometric value. The image data representing the subject image is obtained, and the obtained image data and the data representing the photometric value for each detected divided area are associated with each other and recorded on the recording medium.
[0008]
The second invention is for reading and reproducing the image data and photometric value data recorded on the recording medium in this way.
[0009]
In the image output device according to the second invention, image data representing a subject image and data representing a photometric value obtained by metering an imaging region into a plurality of sections and being measured for each divided section are recorded in association with each other. A reading means for reading the image data and the photometric data from a recording medium, and a display control means for controlling the display device so as to display a subject image represented by the image data read by the reading means on a display screen; A designation means for designating a desired image range among the subject images displayed on the display screen, and a range within the designated range based on the photometric data corresponding to an image within the range designated by the designation means. Characterized in that it comprises means for adjusting the brightness of the image, and image data output means for outputting image data with adjusted brightness. That.
[0010]
The second invention also provides a method suitable for the above apparatus. In other words, this method is based on a recording medium in which image data representing a subject image and data representing a photometric value obtained by measuring light in each divided section by dividing the imaging region into a plurality of sections are recorded in association with each other. Read the image data and photometric data, display the subject image represented by the read image data on the display screen, and specify the desired image range of the subject image displayed on the display screen Then, based on the photometric data corresponding to the image within the designated range, the brightness of the image within the designated range is adjusted, and the image data with the adjusted brightness is output.
[0011]
In the recording medium, image data representing subject images of a plurality of frames having different brightness and data representing a photometric value obtained by photometry for each divided section are recorded. The desired image data is read from the recording medium and displayed on the display screen. A desired range is designated from the subject image displayed on the display screen.
[0012]
Based on the photometric data corresponding to the designated range, the brightness of the image in the designated area is corrected (adjusted). Image data representing an image with adjusted brightness is output. Brightness adjustment is easy because photometric data is created and stored in advance. In this way, even if a portion with an inappropriate brightness is cut out, the portion has an appropriate brightness.
[0013]
According to a third aspect of the present invention, there is provided an image output device for reading out image data for a specific frame from a recording medium on which image data for a plurality of frames obtained by shooting the same subject under different shooting conditions is recorded. Means, display control means for controlling the display device to display on the display screen a subject image represented by the image data read by the reading means, and a desired one of the subject images displayed on the display screen A designation means for designating an image range, a search means for searching for image data representing the most appropriate image among the subject images for the plurality of frames, and a search means for an image within the range specified by the specification means, and the search means Image data output means for outputting the found image data is provided.
[0014]
The third invention also provides a method suitable for the above apparatus. That is, in this method, image data for a specific frame is read out from a recording medium on which image data for a plurality of frames obtained by shooting the same subject under different shooting conditions is read. A subject image represented by the image data is displayed on the display screen, a desired image range is specified from the subject images displayed on the display screen, and the images within the specified range are displayed for the plurality of frames. The image data representing the most appropriate image among the subject images is retrieved, and the image data found by the retrieval is output.
[0015]
In one embodiment, the shooting condition is an exposure amount at which the subject is shot a plurality of times under different exposure conditions. Multiple frames of image data with different brightness are obtained and recorded on a recording medium. In this case, the search means selects image data having the most appropriate brightness for the image within the range designated by the designation means.
[0016]
In another embodiment, the imaging condition is a focal length. For example, the distance from the digital camera to the subject or the zoom magnification is changed, and the subject is photographed multiple times at different focal lengths. Multiple frames of image data representing subject images having different sizes are obtained and recorded on a recording medium. In this case, the search means selects image data having the most appropriate size for the image within the range designated by the designation means.
[0017]
On the recording medium, image data representing a plurality of main subject images of substantially the same main subject image and having different sizes is recorded. The desired image data is read from the recording medium and displayed on the display screen. A desired area is designated from the subject image displayed on the display screen.
[0018]
Image data representing an image having good brightness or size is searched for the image in the designated area. Image data found by the search is output.
[0019]
According to the third invention, one frame of image data representing an image having a good brightness or size of the main subject is output for the designated area. An image (size and brightness) that is almost satisfactory can be obtained without enlarging the image or adjusting the brightness.
[0020]
In a preferred embodiment, brightness adjustment means for adjusting the brightness of the selected image is further provided. The adjustment amount of the output image is reduced so as to obtain a good image quality.
[0021]
In a further preferred embodiment, there is provided means for enlarging an image within the specified range of the image of the selected frame. The enlargement amount of the output image is reduced so as to obtain a good image quality. When electronic zoom (enlargement) processing is performed, image quality generally decreases. However, since the amount of enlargement is small, good image quality is maintained.
[0022]
[Explanation of Examples]
FIG. 1 shows an embodiment of the present invention and is a block diagram showing an electrical configuration of a digital still camera.
[0023]
The digital still camera is capable of zoom photography and is provided with a zoom lens 2. The zoom amount of the zoom lens 2 is controlled by the CPU 5.
[0024]
The CPU 5 has functions of AE (automatic exposure adjustment), color temperature adjustment, gamma correction, and data compression.
[0025]
The digital still camera is also provided with a diaphragm 1, and the diaphragm 1 is controlled based on AE.
[0026]
The shutter release button 10 is of a two-stage stroke type. When the shutter release button 10 is depressed in the first stage, the aperture control is performed, and the image data representing the subject image is recorded by the depression in the second stage. A signal indicating depression of the shutter release button 10 is input to the CPU 5.
[0027]
An operation switch 8 is provided in the digital still camera. With this operation switch, a shooting mode, a playback mode, a zoom amount, and a zoom area can be set. A signal indicating the setting from the operation switch 8 is input to the CPU 5.
[0028]
The CPU 5 is externally attached with a ROM 9 in which an operation program is stored.
[0029]
Further, the digital still camera is provided with a photometric element 6 capable of division photometry. With divided photometry, a photometric value for each divided area is obtained when the shooting area is divided into a plurality of areas. A signal indicating the photometric value is input to the CPU 5. Of course, it is needless to say that the divided photometric value may be calculated from image data obtained by photographing as described later without providing the photometric element 6.
[0030]
When the shooting mode is set by the operation switch 8, a light image representing a subject image is formed on the light receiving surface of the CCD 3 by the zoom lens 2. A signal representing the subject image is output from the CCD 3 and input to the analog / digital conversion circuit 4. The analog / digital conversion circuit 4 converts the input analog video signal into digital image data. The digital image data is input to the CPU 5.
[0031]
The digital image data is given from the CPU 5 to the liquid crystal display device 12 via the display control circuit 11. The subject image obtained by photographing is displayed on the display screen of the liquid crystal display device 12 by the display control circuit 11.
[0032]
FIG. 2 is a flowchart showing a processing procedure at the time of recording image data representing a subject image. FIG. 3 shows an example of a subject image (reference image). FIG. 4 shows the structure of an image file recorded on the memory card.
[0033]
When the shutter release button 10 is depressed in the first stage (YES in step 20), the photometric element 6 performs divided photometry. As shown in FIG. 3, the divided photometry is performed in 30 areas (areas a1 to a30) by dividing the imaging area into 6 areas in the horizontal direction and 5 areas in the vertical direction. Data indicating the divided photometric value for each area is input to the CPU 5. Data indicating the divided photometric value is given to the RAM 7 and temporarily stored (step 21).
[0034]
In the CPU 5, the divided photometric values are integrated for one frame. Based on the integrated value, for example, the exposure is determined so that the entire subject image has a predetermined brightness (step 22). The exposure amount can be determined by other known methods. The diaphragm 1 is controlled by the CPU 5 based on the determined exposure.
[0035]
When the shutter release button 10 is depressed in the second stage (YES in step 23), the image data representing the subject image is given from the CPU 5 to the RAM 7 and temporarily stored (step 24).
[0036]
Image data is read from the RAM 7 and input to the CPU 5. In the CPU 5, predetermined data processing of color temperature adjustment, gamma correction and data compression is performed on the image data (step 25).
[0037]
The divided photometric data temporarily stored in the RAM 7 is read out, and an image file as shown in FIG. 4 is created from the divided photometric data and the compressed image data (step 26). The created image file is recorded on the memory card 13 (step 27).
[0038]
Referring to FIG. 4, a header and a data recording area are formed in the image file.
[0039]
In the header, data representing the file name, shooting date, shooting time, shutter speed, and aperture value are recorded.
[0040]
In the data recording area, a photometric value recording area and an image data recording area are formed.
[0041]
In the photometric value recording area, divided photometric data (EV values) are recorded corresponding to the divided sections a1 to a30 of the subject image. In addition, compressed image data is recorded in the image data recording area.
[0042]
FIG. 5 is a block diagram showing the electrical configuration of the digital printer.
[0043]
The overall operation of the digital printer is controlled by the CPU 30.
[0044]
The CPU 30 is externally provided with a ROM 36 in which an operation program is stored.
[0045]
The digital printer has a function of performing electronic zoom. For this purpose, an electronic zoom processing circuit 34 is connected to the CPU 30.
[0046]
The digital printer is provided with an operation switch 35. By this operation switch 35, commands for image display, printing, zoom amount and position can be given. A signal indicating a command from the operation switch 35 is input to the CPU 30.
[0047]
Further, the CPU 30 is provided with a gain control circuit 32 for level adjustment.
[0048]
FIG. 6 is a flowchart showing a playback processing procedure using a digital printer. FIG. 7 shows an example of an image obtained by trimming a part of the reference image.
[0049]
When the memory card 13 on which the above-described image file (see FIG. 4) is recorded is loaded into the digital printer, the image file is read from the memory card 13 (step 51). The image file is given to the RAM 33 via the interface 31 and the CPU 30 and temporarily stored.
[0050]
The image file stored in the RAM 33 is read out and input to the CPU 30. In the CPU 30, the compressed image data stored in the image file is extracted. The compressed image data is decompressed by the CPU 30. The decompressed image data is given to the image display control circuit 37, and a subject image (reference image, see FIG. 3) represented by the image data is displayed on the display screen of the monitor display device 38 (step 52).
[0051]
When displaying or printing a part of the reference image, trimming is performed using the operation switch 35 (step 53). On the display screen, a trimming range is designated from the reference image as shown in FIG. 3 (in FIG. 3, the trimming region is indicated by a chain line Cl).
[0052]
When trimming is performed, it is determined whether the brightness adjustment performed on the image (trimmed image) in the trimming area is set to auto or manual (step 54). The determination as to whether it is automatic or manual will be made based on a command given from the operation switch 35.
[0053]
If the brightness adjustment is performed automatically, the brightness of the trimmed image is detected, and a histogram for the brightness is created in the CPU 30 (step 56). When a part of the reference image is trimmed, the brightness of the entire reference image may not be appropriate for the trimmed image even if the brightness is appropriate. Thus, when the trimmed image does not have an appropriate brightness, correction is necessary. Therefore, it is determined whether the trimmed image needs to be corrected (step 57).
[0054]
If correction is necessary (YES in step 57), it is determined to which divided photometric area of the reference image the trimmed image corresponds (step 58). For example, if the trimmed image is an image of an area indicated by the chain line Cl of the reference image in FIG. 3, the trimmed image is divided photometric areas a13, a14, a15, a16, a17, a19, a20, a21, a22, a23 of the reference image. , A25, a26, a27, a28 and a29.
[0055]
Data indicating the obtained photometric value of the divided photometric area is read from the image file stored in the RAM 33. Based on the read divided photometric data, the CPU 30 controls the trimmed image to have an appropriate brightness (step 59). Even if the image of the region trimmed with respect to the reference image is too bright or too dark, the trimmed image becomes an image with relatively appropriate brightness.
[0056]
Image data representing the trimmed image is given to the electronic zoom processing circuit 34, and electronic zoom processing is performed. By applying the image data subjected to the electronic zoom processing to the display control circuit 37, the trimming subjected to the electronic zoom processing is displayed on the display screen of the monitor display device 38 as shown in FIG. 7 (step 60). ).
[0057]
Further, the image data subjected to the electronic zoom processing is given to the buffer RAM 39 and temporarily stored. The image data is read from the buffer RAM 39 and given to the printing apparatus 40. The trimming image is printed by the printing device 40 while the printing paper is being conveyed by the paper conveying device 41 (step 61). A trimmed image having a relatively appropriate brightness is printed.
[0058]
When the user manually adjusts the brightness (step 54), a brightness correction command is given using the operation switch 35 while displaying the trimmed image on the display screen of the monitor display device 38. Image data representing the trimmed image is given to the gain control circuit 32, and the level is adjusted according to the brightness correction command. The user manually adjusts the brightness (step 55). If necessary, the user manually adjusts the contrast and color of the trimmed image. Contrast adjustment processing, color adjustment processing, and the like will be realized by the CPU 30.
[0059]
FIG. 8A to FIG. 11 show another embodiment.
[0060]
In this embodiment, three frames of images are obtained by photographing the same subject with different exposures. Specifically, the aperture 1 of the digital still camera is controlled so that different exposures are obtained in three shootings.
[0061]
As shown in FIG. 8A, the subject image of the first frame is obtained by shooting with an exposure 1 EV less than the standard exposure subject image (exposure with appropriate brightness based on the photometric value). (File name ff001b0.jpg). In FIG. 8A, it is expressed by hatching to indicate that the exposure is less than the standard exposure. Image data representing the subject image shown in FIG. 8A is stored in the image data recording area of the image file shown in FIG.
[0062]
The image file shown in FIG. 9A is photographed with a different exposure compared to the exposure of the standard exposure subject image in addition to the data indicating the file name, shooting date, shooting time, shutter speed and aperture value in the header. The data indicating whether or not it has been stored is stored.
[0063]
The subject image of the second frame is obtained by shooting with standard exposure as shown in FIG. 8B (file name ff001b1.jpg). In FIG. 8 (B), it is expressed by hatching that is spaced apart from the hatching of the image shown in FIG. 8 (A) so as to indicate standard exposure. Image data representing the subject image shown in FIG. 8B is stored in the image data recording area of the image file shown in FIG. 9B.
[0064]
Also in the image file shown in FIG. 9B, the exposure differs from the exposure of the subject image of the standard exposure in addition to the data indicating the file name, shooting date, shooting time, shutter speed and aperture value in the header. Data indicating whether the image has been shot is stored.
[0065]
The third frame subject image was obtained by shooting with an exposure 1 EV higher than the standard exposure subject image as shown in FIG. 8C (file name ff001b2.jpg). In FIG. 8C, hatching is not expressed to indicate that the exposure is higher than the standard exposure. Image data representing the subject image shown in FIG. 8C is stored in the image data recording area of the image file shown in FIG.
[0066]
In the image file shown in FIG. 9C as well, the amount of exposure differs from the exposure of the subject image of standard exposure in addition to the data indicating the file name, shooting date, shooting time, shutter speed, and aperture value in the header. Data indicating whether the image has been shot is stored.
[0067]
Three image files representing three identical subject images having different exposures are associated with each other and recorded on the memory card 13.
[0068]
FIG. 10 shows another example of the image file.
[0069]
Image data representing three substantially identical subject images with different exposures are stored in the image data recording area of one image file. The header includes data indicating that the image represented by the image data recorded in the image data recording area is captured with an exposure 1 EV less than the standard exposure, and data indicating that the image is captured with the same exposure as the standard exposure. In addition, data indicating that the image was taken with an exposure 1 EV higher than the standard exposure is recorded in association with the corresponding image data.
[0070]
As described above, the image data representing the images with different exposures is recorded in the memory card 13 without recording the three image files representing the same subject image with the three different exposures on the memory card 13. May be.
[0071]
FIG. 11 is a flowchart showing a processing procedure when an image file (which may be one image file or three image files) representing three identical subject images with different exposures is reproduced using the digital printer shown in FIG. It is. In this figure, the same processes as those shown in FIG.
[0072]
Image data representing a standard image (standard exposure image) is read from the memory card 13 (step 71). The read standard image data is temporarily stored in the RAM 33 via the CPU 30. The standard image data is read from the RAM 33 and given to the display control circuit 37, and the standard image is displayed on the display screen of the monitor display device 38 (step 72). The user performs trimming while viewing the displayed standard image (step 73). It is determined whether the brightness adjustment is performed manually or automatically (step 74).
[0073]
In the case of auto, the brightness of the trimmed image is detected by the CPU 30. Based on the detected value, a correction amount necessary for the trimmed image to have an appropriate brightness is calculated (step 76). In this embodiment, since the divided photometry value is not stored in the image file, the average brightness level represented by the image data of the trimmed image is calculated, and the calculated value and a predetermined appropriate brightness level are obtained. They are compared and the difference is the correction amount. When divided photometric values are stored, the divided photometric values can be used.
[0074]
If correction is required (YES in step 77), among the images of the plurality of frames recorded on the memory card 13, an image that requires less correction (the average brightness of the image in the range corresponding to the trimmed image) The image whose brightness level is closest to the appropriate brightness level is selected based on the calculated correction amount (step 78). Image data representing the selected image is read from the memory card 13 and temporarily stored in the RAM 33. If the selected image is a standard image, the image data representing the standard image is already stored in the RAM 33 and is not read from the memory card 13 again. Needless to say, the standard image data may be read from the memory card 13 again.
[0075]
Image data representing a range of images corresponding to the trimmed image among the selected images is read from the RAM 33 and input to the gain control circuit 32. In the gain control circuit 32, the image in the range corresponding to the trimmed image of the selected image is appropriate based on the calculated correction amount or based on the average brightness of the image data in the read range. The level of the image data is finely adjusted so as to be bright (step 79).
[0076]
The image data whose level is finely adjusted is given to the display control circuit 37, and an image with appropriate brightness is displayed on the display screen of the monitor display device 38 (step 60). Thereafter, printing is performed (step 61).
[0077]
An image that requires only a small amount of correction is selected from three images with different exposures, and the brightness of the selected image is finely adjusted. Since the correction amount is reduced, the obtained image quality is improved.
[0078]
When the brightness is adjusted manually (step 74), three image data with different exposures are read from the memory card 13 and given to the display control circuit 37. Three images with different exposures are displayed at different locations on the display screen of the monitor display device 38. The user selects an image having a desired brightness from these three images. A brightness adjustment command is input from the operation switch 35 for the selected image.
[0079]
Image data representing an image selected by the user is given to the gain control circuit 32, and the level of the image data is manually adjusted in accordance with the brightness adjustment command given by the user (step 75).
[0080]
FIG. 12 (A) to FIG. 14 show still another embodiment.
[0081]
FIGS. 12A to 12C show examples of subject images. FIG. 13 shows the structure of an image file.
[0082]
In this embodiment, three frames of the subject image are photographed with different focal lengths (changing the distance or changing the zoom magnification) for almost the same main subject. Accordingly, subject images of frames having different main subject image sizes are obtained.
[0083]
The first frame subject image (short focus image) is obtained by shooting at a shorter focus than the standard focus as shown in FIG. Therefore, the size of the main subject image is smaller than the standard image (the image shown in FIG. 12B). Image data representing the subject image shown in FIG. 12A is recorded in the image data recording area shown in FIG.
[0084]
In the image file, a header recording area and an image data recording area are formed.
[0085]
The header includes a file name, a shooting date, a shooting date (in the example shown in FIG. 13, one shooting date is recorded, but three shooting dates may be recorded corresponding to three frames) and a shutter. In addition to the speed and aperture value, focal length information indicating what focal length the image data recorded in the image data recording area is obtained is recorded.
[0086]
The subject image (standard image) of the second frame is obtained by photographing with a standard focus as shown in FIG. A main subject image OB having a standard size is obtained. Image data representing the subject image shown in FIG. 12B is also recorded in the image data recording area shown in FIG.
[0087]
The third frame subject image (long focus image) is obtained by shooting with a longer focus than the standard focus as shown in FIG. Therefore, a main subject image OC larger than the standard main subject image OB is obtained. Image data representing the subject image shown in FIG. 12C is also recorded in the image data recording area shown in FIG.
[0088]
Image data representing three images of the substantially identical main subject images OA, OB and OC having different focal lengths (different image sizes) is recorded in the memory card 13.
[0089]
FIG. 14 shows a processing procedure for reproducing a memory card in which image data representing three images having different image sizes with respect to substantially the same main subject are reproduced using the digital printer shown in FIG. It is a flowchart to show. In this figure, the same processes as those shown in FIG.
[0090]
Short-focus image data (image data in which the main subject image is smaller than that of the standard image) is read from the memory card 13 and provided to the display control circuit 37 (step 71). A short focus image is displayed on the display screen of the monitor display device 38 (step 72). Trimming is performed by the user (step 73), and it is determined whether zoom adjustment to be performed on the trimmed image is set to auto or manual (step 80).
[0091]
When zoom adjustment is performed automatically, based on the size of the trimmed image and the size of one frame, the scaling factor for enlarging the trimmed image is set so that the trimmed image becomes the size of one frame. Calculated (step 82). It is determined whether it is better to perform electronic zoom processing using an image other than the short focus image. That is, it is determined whether it is better to replace the image and perform the electronic zoom process (step 83). The first ratio between the size of the short focus image (its main subject) and the size of the standard image (the main subject), the size of the short focus image (the main subject) and the size of the long focus image (the main subject) The second ratio is predetermined. If the calculated scaling factor is close to 1, a short focus image is used. If the calculated scaling factor is close to the first or second ratio, a standard image or a long focus image is selected (step 84). Of the image data representing the selected image, image data in a range corresponding to the trimmed image is read from the memory card 13 and temporarily stored in the RAM 33. The image data is given from the RAM 33 to the electronic zoom processing circuit 34. In the electronic zoom processing circuit 37, fine adjustment of the size of the image by electronic zoom processing is performed so that the image of the read image data becomes the size of one frame (step 85). Even when a short focus image is used, electronic zoom processing is performed as necessary.
[0092]
By applying the finely adjusted image data to the display control device 37, the image after the electronic zoom is displayed on the display screen of the monitor display device 38 as shown in FIG. 7 (step 60). Thereafter, the zoomed image is printed (step 61).
[0093]
When zoom adjustment is performed manually (step 80), image data representing three frames of different sizes recorded on the memory card 13 is read out. The read image data is given to the display control circuit 37. Three frames of different sizes are displayed on the display screen of the monitor display device 38. The user selects an image having a main subject image of a desired size from the three frames having different sizes (step 81). Thereafter, if necessary, a size adjustment command is given by the operation switch 35. In response to the size adjustment command, the electronic zoom processing circuit 34 performs electronic zoom processing.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an electrical configuration of a digital still camera.
FIG. 2 is a flowchart showing a processing procedure at the time of recording image data.
FIG. 3 is an example of a reference image.
FIG. 4 shows the structure of an image file.
FIG. 5 is a block diagram showing an electrical configuration of a digital printer.
FIG. 6 is a flowchart illustrating a processing procedure when an image is reproduced.
FIG. 7 shows an example of a trimmed image.
FIGS. 8A to 8C show examples of subject images.
FIGS. 9A to 9C show the structure of an image file.
FIG. 10 shows the structure of an image file.
FIG. 11 is a flowchart illustrating a processing procedure when an image is reproduced.
FIGS. 12A to 12C show examples of subject images. FIGS.
FIG. 13 shows a file structure of an image file.
FIG. 14 is a flowchart illustrating a processing procedure when an image is reproduced.
[Explanation of symbols]
1 Aperture
2 Zoom lens
3 CCD
5,30 CPU
6 Photometric elements
7,33 RAM
8,15 Operation switch
9,36 ROM
11, 37 Display control circuit
32 Gain control circuit
34 Electronic zoom processing circuit
40 Printing device

Claims (2)

Photometry is obtained by recording image data representing a subject image in an image data recording area formed in a data recording area excluding the header of the image file, and dividing the imaging area into a plurality of sections and measuring the light in each divided section. The image data and the photometric data are read from the recording medium on which the image file in which the data representing the value is recorded in the photometric value recording area formed in the data recording area corresponding to the divided section is recorded. Reading means,
Display control means for controlling the display device so as to display a subject image represented by the image data read by the reading means on a display screen;
Designation means for designating a range of a desired image among the subject images displayed on the display screen;
Means for adjusting the brightness of the image within the specified range based on the photometric data corresponding to the image within the range specified by the specifying means, and image data for outputting the image data with adjusted brightness Output means,
An image output device. Photometry is obtained by recording image data representing a subject image in an image data recording area formed in a data recording area excluding the header of the image file, and dividing the imaging area into a plurality of sections and measuring the light in each divided section. data representing the value, the image data and the photometric data from a recording medium on which the image file is recorded which corresponds recorded on the photometric value recording area formed in the data recording area divided partitions reading,
The subject image represented by the scanned image data is displayed on the display screen,
Specify the desired range of the subject image displayed on the display screen,
Based on the photometric data corresponding to the image within the specified range, the brightness of the image within the specified range is adjusted,
Output image data with adjusted brightness,
Image output method.

Images