KR100562405B1 - Method of image enhancement in digital camera - Google Patents

Abstract

 The present invention relates to an image correction method of a digital camera capable of directly editing an image after shooting without moving the image data to a separate editing device. An image correction method of a digital camera according to the present invention includes the steps of: (a) displaying an image on an image display device; (b) selecting an editing region to be modified from all image regions displayed on the image display device; And (c) modifying the image of the editing area.

Description

How to modify the image of a digital camera {Method of image enhancement in digital camera}

1 is a perspective view showing the front and top appearance of the digital camera according to the present invention.

FIG. 2 is a rear view illustrating a rear shape of the digital camera of FIG. 1.

3 is a diagram illustrating an incident side structure of the digital camera of FIG. 1.

4 is a block diagram showing the overall configuration of the digital camera of FIG.

FIG. 5 is a flowchart illustrating a photographing control algorithm of the microcontroller of FIG. 4.

6 is a flowchart schematically illustrating a method of correcting an image of a digital camera as a preferred embodiment according to the present invention.

FIG. 7 is a flowchart schematically illustrating a brightness adjusting step in the image correcting method of the digital camera of FIG. 6.

FIG. 8 is a flowchart schematically illustrating a sharpness adjusting step in the image correcting method of the digital camera of FIG. 6.

9A and 9B schematically illustrate an image and a histogram before the image is corrected by the image correcting method of the digital camera of FIG. 6.

10A to 10C schematically illustrate histograms of an edited region selection, an edited image region detection, and a selected edited image region before modification in the method of correcting an image of the digital camera of FIG. 6.

11A and 11B are schematic views illustrating a histogram of an edited image region and a modified image, which are corrected by the image correcting method of the digital camera of FIG. 6.

FIG. 12 is a diagram illustrating an entire image modified by the image correcting method of the digital camera of FIG. 6.

The present invention relates to a control method of a digital camera, and more particularly, to an image correction method of a digital camera capable of directly editing an image after shooting without moving the image data to a separate editing device such as a personal computer. .

In a conventional video recording apparatus including a digital camera, when the captured image is not satisfactory after capturing the image, the image data is transferred to a separate editing device such as a personal computer (PC) to correct the desired image. Transfer and modify the image using a separate image editing program in the editing device.

Alternatively, if the image taken after shooting is not satisfactory, the user immediately displays the captured image on the image display device mounted on the image capturing apparatus, and adds a function to delete the unsatisfactory image. Helps save only pictures.

However, in order to correct the photographed image, a method of moving the image data to a separate editing apparatus such as a personal computer and using an image editing program installed therein can instantly transmit or output the photographed image to another medium. There is a problem that brings inconvenience to the user in the current state of technology.

In addition, the ability to show images taken in the shooting mode and allow the user to select whether or not to save them is convenient because it allows users to instantly check whether they have been taken properly, but if they take images of moments that cannot be missed, they are erased again. Since it is impossible to photograph, there is a problem that the image must be corrected after transmitting the image data to a separate photographing apparatus.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an image correction method of a digital camera that can directly edit an image after shooting without moving the image data to a separate editing device such as a personal computer. do.

According to an aspect of the present invention, there is provided a method for modifying an image of a digital camera, the method comprising: displaying an image on a video display device; (b) selecting an editing region to be modified from all image regions displayed on the image display device; And (c) modifying the image of the editing area.

In the step (c), it is preferable to perform at least one of brightness adjustment for adjusting the brightness of the image in the editing area and sharpness adjustment for adjusting the sharpness of the image in the editing area.

Step (c) includes (c1) determining a correction method to correct an image in the editing area, (c2) adjusting the brightness of the image in the editing area, and (c3) adjusting the sharpness of the image in the editing area. It is preferred to have a step.

The step (c2) may include: (c21) detecting an edited image area that is a target image to be adjusted in brightness, (c22) detecting a histogram by detecting a luminance value in the edited image area, and (c23) (C) modifying the image so that the luminance values of the set luminance region in the histogram are evenly distributed.

The step (c3) may include (c31) detecting an edited image area that is a target image to be adjusted in the edit area, and (c32) adjusting the sharpness of the edited image area according to an external setting. It is desirable to.

In the recording medium according to another aspect of the present invention, a program that implements an image correction method of the digital camera is recorded.

The digital camera according to another aspect of the present invention is applied to the image correction method of the digital camera.

According to the present invention, an image can be directly edited after shooting without moving the image data to a separate editing device such as a personal computer.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the front and top appearance of the digital camera according to the present invention.

Referring to the drawings, in front of a conventional digital camera 1, a microphone (MIC), a self-timer lamp 11, a flash 12, a shutter button 13, a mode dial 14, a function-selection button 15, the shooting-information display unit 16, the viewfinder 17a, the function-block button 18, the flash-light amount sensor 19, the lens unit 20, and the external interface unit 21.

In the self-timer mode, the self-timer lamp 11 operates for a set time from when the shutter button 13 is pressed to when the shutter is operated. The mode dial 14 is used to select and set various modes, for example, a still image shooting mode, a night view shooting mode, a moving picture shooting mode, a playback mode, a computer connection mode, and a system setting mode. The function-selection button 15 is used for the user to select one of the operation modes of the digital camera 1, for example, a still image shooting mode, a night view shooting mode, a moving picture shooting mode, and a playback mode. The shooting-information display section 16 displays information of each function related to shooting. The function-block button 18 is used for the user to select each function displayed on the shooting-information display unit 16.

FIG. 2 is a rear view illustrating a rear shape of the digital camera of FIG. 1.

Referring to the drawings, behind the conventional digital camera 1, a speaker SP, a power button 31, a monitor button 32, an auto-focus lamp 33, a viewfinder 17b, a flash standby lamp (34), color LCD panel 35, OK / Delete button 36, enter / playback button 37, menu button 38, wide angle-zoom button 39w, telephoto ( telephoto) -zoom button 39t, up-move button 40up, right-move button 40ri, down-move button 40do, and left-move button 40le.

The monitor button 32 is used by the user to control the operation of the color LCD panel 35. For example, when the user presses the monitor button 32 first, an image of the subject and shooting information thereof are displayed on the display panel 35, and when the user presses the second button, only the image of the subject is displayed on the display panel 35. When pressed, the power applied to the display panel 35 is cut off. The auto-focus lamp 33 operates when the auto focusing operation is completed. The flash standby lamp 34 operates when the flash (12 in FIG. 1) is in standby for operation. The confirm / delete button 36 is used as a confirm button or a delete button in the process of setting each mode by the user. The enter / playback button 37 is used for inputting data from the user or for a function such as stopping or playing in the playback mode. The menu button 38 is used to display the menu of the mode selected in the mode dial 14. The up-movement button 40up, the right-movement button 40ri, the down-movement button 40do, and the left-movement button 40le are also used in the process of setting each mode by the user.

3 is a diagram illustrating an incident side structure of the digital camera of FIG. 1. 4 is a block diagram showing the overall configuration of the digital camera of FIG.

Referring to the drawings, the optical system OPS including the lens unit 20 and the filter unit 41 optically processes light from a subject. The lens unit 20 of the optical system OPS includes a zoom lens ZL, a focus lens FL, and a compensation lens CL.

When the user presses the wide angle-zoom button (39w in FIG. 2) or the telephoto-zoom button (39t in FIG. 2) included in the user input unit INP, a corresponding signal is output to the microcontroller 512. ) Is entered. Accordingly, as the microcontroller 512 controls the lens driver 510, the zoom motor M _Z is driven to move the zoom lens ZL. That is, when the wide angle-zoom button (39w in FIG. 2) is pressed, the focal length of the zoom lens ZL is shortened to widen the angle of view, and the telephoto-zoom button 39t is When pressed, the focal length of the zoom lens ZL becomes long and the angle of view becomes narrow. According to such a characteristic, the microcontroller 512 may obtain an angle of view for the position of the zoom lens ZL from the design data of the optical system OPS. Here, since the position of the focus lens FL is adjusted while the position of the zoom lens ZL is set, the angle of view is hardly influenced by the position of the focus lens FL.

On the other hand, when the focus is automatically or manually focused on the subject, the current position of the focus lens FL changes with respect to the subject distance Dc. Here, since the position of the focus lens FL is adjusted while the position of the zoom lens ZL is set, the subject distance Dc is affected by the position of the zoom lens ZL. In the auto focusing mode, the focus motor M _F is driven by the microcontroller 512 controlling the lens driver 510. Accordingly, the focus lens FL is moved from the front to the rear, and in this process, the position of the focus lens FL having the highest high frequency content of the image signal, for example, the number of position steps of the focus motor M _F. Is set.

The compensation lens CL serves to compensate for the overall refractive index and is not driven separately.

Reference numeral M _A denotes a motor for driving an aperture (not shown). Here, the rotation angle of the diaphragm drive motor M _A varies depending on the case of the designated exposure mode and the case where it is not. The designated exposure mode refers to a mode for setting the exposure amount of the digital camera to the average brightness of the designated detection area when the desired area of the target area matches the designated detection area displayed on the display panel 35 of the digital camera. Say.

In the filter portion 41 of the optical system OPS, an optical low pass filter (OLPF) removes high frequency optical noise. Infra-Red cut filters (IRFs) block infrared components of incident light.

The photoelectric conversion unit (OEC) of a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) converts light from an optical system (OPS) into an electrical analog signal. Here, the digital signal processor 507 controls the timing circuit 502 to control the operation of the photoelectric converter OEC and the Correlation Double Sampler and Analog-to-Digital Converter (CDS-ADC) element 501. The CDS-ADC element 501 as an analog-to-digital converter processes the analog signal from the photoelectric converter (OEC), removes the high frequency noise, adjusts the amplitude, and converts the analog signal into a digital signal. The digital signal processor 507 processes the digital signal from the CDS-ADC element 501 to generate a digital image signal classified into luminance and chroma signals.

The light emitting portion LAMP driven by the microcontroller 512 includes a self-timer lamp 11, an auto-focus lamp (33 in FIG. 2) and a flash standby lamp (34 in FIG. 2). The user input unit INP includes a shutter button (13 in FIG. 1), a mode dial (14 in FIG. 1), a function-selection button (15 in FIG. 1), a function-block button (18 in FIG. 1), a monitor button ( 32 in FIG. 2, OK / Delete button (36 in FIG. 2), Enter / Playback button (37 in FIG. 2), Menu button (38 in FIG. 2), Wide-Zoom button (39w in FIG. 2), Tele- Zoom button (39t in FIG. 2), up-move button (40up in FIG. 2), right-move button (40ri in FIG. 2), down-move button (40do in FIG. 4), and left-move button (FIG. 2) 40le).

The digital video signal from the digital signal processor 507 is temporarily stored in the DRAM (Dynamic Random Access Memory) 504. The EEPROM (Electrically Erasable Programmable Read Only Memory) 505 stores algorithms and setting data necessary for the operation of the digital signal processor 507. The memory card of the user is attached to or detached from the memory card interface 506.

The digital image signal from the digital signal processor 507 is input to the LCD driver 514, whereby the image is displayed on the color LCD panel 35.

On the other hand, the digital video signal from the digital signal processor 507 can be transmitted by serial communication via a universal serial bus (USB) connection 21a or an RS232C interface 508 and its connection 21b, and a video filter ( 509 and the video output unit 21c can be transmitted as a video signal.

The audio processor 513 outputs the audio signal from the microphone MIC to the digital signal processor 507 or the speaker SP, and outputs the audio signal from the digital signal processor 507 to the speaker SP.

On the other hand, the microcontroller 512 drives the flash 12 by controlling the operation of the flash controller 511 according to the signal from the flash-light amount sensor 19.

FIG. 5 is a flowchart illustrating a photographing control algorithm of the microcontroller of FIG. 4.

The photographing control algorithm of the microcontroller 512 of FIG. 4 will be described with reference to FIGS. 1 to 5 as follows. Here, the shutter button 13 included in the user input unit INP has a two-stage structure. That is, after the user operates the wide-zoom button 39w and the tele-zoom button 39t, the S1 signal from the shutter button 13 is turned on by pressing the shutter button 13 only one step, and 2 When the button is pressed all the way, the S2 signal from the shutter button 13 is turned on. Thus, the photographing algorithm of FIG. 5 starts when the user presses the shutter button 13 one step (step 101). Here, the current position of the zoom lens ZL is already set.

First, the remaining amount of memory card is checked (step 102), and it is checked whether it is a capacity capable of recording a digital video signal (step 103). If it is not a recordable capacity, it is indicated that the capacity of the memory card is insufficient (step 104). In the case of a recordable capacity, the following steps are performed.

First, an Automatic White Balance (AWB) mode is performed to set the relevant parameters (step 105). Next, an automatic exposure (AE) mode is performed, whereby the exposure amount for incident luminance is calculated, and the aperture driving motor M _A is driven in accordance with the calculated exposure amount (step 106). Next, an automatic focusing (AF) mode is performed to set the current position of the focus lens FL (step 107).

Next, it is checked whether the S1 signal, which is the first-stage signal from the shutter button 13, is on (step 108). If the S1 signal is not On, the execution-program is terminated because there is no user's intention of shooting. If the S1 signal is On, the following steps are continued.

First, it is checked whether the S2 signal is on (step 109). If the S2 signal is not on, the user has not pressed the second stage of the shutter button 13 for shooting, so the execution-program is moved to step 106 above.

If the S2 signal is on, the user presses the second stage of the shutter button 13 for shooting, and thus the shooting operation is performed (step 110). That is, the digital signal processor 507 is operated by the microcontroller 512, and the photoelectric conversion unit OEC and the CDS-ADS 501 are operated by the timing circuit 502. Next, the image data is compressed (step 111) to generate a compressed image file (step 112). Then, after the generated image file is stored in the user's memory card from the digital signal processor 507 via the memory card interface 506 (step 113), execution of the algorithm is terminated.

According to the exemplary embodiment, the microcontroller 512 of FIG. 4 does not exist separately, and the imaging control algorithm performed by the microcontroller 512 described above may be processed by the digital signal processor 507 of FIG. 4. will be.

6 is a flowchart schematically illustrating a method of correcting an image of a digital camera as a preferred embodiment according to the present invention. FIG. 7 is a flowchart schematically illustrating a brightness adjusting step in the image correcting method of the digital camera of FIG. 6. FIG. 8 is a flowchart schematically illustrating a sharpness adjusting step in the image correcting method of the digital camera of FIG. 6.

Referring to the drawings, a method 200 of modifying an image of a digital camera includes: (a) displaying an image on an image display device (S201); (b) selecting an edit region to be modified from all image regions displayed on the image display apparatus (S203); And (c) modifying the image of the editing area (S205, S206).

The method 200 of modifying an image of a digital camera according to the present embodiment displays an image on a video display device and reproduces the image (S201), and determines an area to be edited when the image shows an unsatisfactory result (S202). By selecting (S203), the image is corrected (S204 to S206), and the original image file is converted or generated (S207 to S209).

In the step (a) (S201), the image is displayed on the image display device. The image may be an image input to the digital camera through shooting or an image stored in an external recording medium. In this case, the image stored in the external recording medium may be an image in which an image photographed by a digital camera is stored in the recording medium, or an image input from an external image capturing or processing device may be stored in the recording medium.

Next, when the user reports the image displayed on the video display device in step (a) (S201) and determines whether the reproduced image is a satisfactory image or an unsatisfactory image (S202), and selects a correction if it is to be corrected. By performing the steps S203 to S209 below the step (b), the image may be modified to obtain a satisfactory image.

In the step (b) (S203), the editing area to be corrected is selected from all the images displayed on the image display device, and the editing area is selected using digital zooming used in a conventional digital camera. You will be able to choose. According to such digital zooming, it is possible to enlarge a specific area of a displayed image at a set ratio and display it as an enlarged area, and to move the enlarged area up, down, left and right in the entire image area, and to select an enlarged area as an editing area. desirable.

To do this, press the tele-zoom button (37t in FIG. 2) to enlarge the image displayed on the display device in software, and use the up, down, left and right navigation buttons (40up, 40do, 40le, 40ri in FIG. 2). In this case, the portion to be enlarged can be selected and enlarged from the entire display image, and the selected image area can be selected as the editing area. At this time, pressing the wide-zoom button (37w in Fig. 2) to restore the image of the original size.

In the step (c) (S204 to S206), according to the selection of the image correction method input from the outside, at least during the brightness adjustment for adjusting the brightness of the image in the editing area and the sharpness adjustment for adjusting the sharpness of the image in the editing area By doing one, you can modify the image. To this end, in the image correction method 200 of the digital camera of the present embodiment, step (c1) of selecting an image correction method (S204), step (c2) of adjusting the brightness (S205), and adjusting the sharpness (c2) Step s206 is provided.

In the step (c1) (S204) to determine the correction method to modify the image in the editing area by the user's selection from the outside. Next, the step (c2) (S205) or the step (c3) (S206) is performed according to the determination of the image correction method in the step (c1). At this time, if necessary, an embodiment in which a mode in which both the step (c2) (S205) and the step (c3) S206 are performed may be added according to a user's selection. In step (c2), the brightness of the image in the editing area is adjusted. In addition, in step (c3) (S206), the sharpness of the image in the editing area is adjusted.

In addition, the method 200 of modifying the image of the digital camera according to the present embodiment may further include the step (S207 to S209) of selectively storing the image modified in the steps (S204 to S206). That is, it is determined whether to save the modified image by converting the original image (S207), and when the image is to be converted, the modified image is transferred to the existing image according to the determination of whether to create a new file (S208). It may be stored in a manner of overwriting (S210), or in a manner of maintaining an existing image and generating a new image file (S209).

In step (c2) (S205) of adjusting the brightness of the selected editing area, the brightness value of the image in the editing area is detected to form a histogram, and the luminance value of the selected setting brightness area is distributed evenly according to the setting from the outside. It is desirable to modify the image to adjust the brightness of the image.

To this end, the step (c2) (S205), (c21) detecting the edited image area that is the target image to be adjusted brightness in the edit area (S501), (c22) detects the luminance value in the edited image area histogram (S502 and S503), and (c23), modifying the image so that the luminance value of the set luminance region is evenly distributed in the histogram (S504).

In the step (c21) (S501), it is preferable to obtain the edited image area by detecting the strongest edge of the edited area by the normal edge detection method. To this end, it is preferable to divide the edit area into at least one block and perform edge filtering on a block-by-block basis to detect a portion having the strongest edge among the edit areas. In this case, it is preferable that the histogram is formed by detecting a luminance value at each pixel in the edited image area and is related to the frequency of each luminance value and the luminance value.

In order to distribute the luminance values of the set luminance region selected according to the setting from the outside in step (c23) (S23), a conventional histogram equalization method may be used.

In addition, the step (c2) (S205) is to display the corrected image on the video display device (S505) to allow the user to confirm whether the correction, and if it is determined that further correction is necessary (S506) step (c23) ( It is preferable to further include a step that can be performed to perform S504) again.

In step (c3) (S206) of adjusting the sharpness of the selected editing area, (c31) detecting the edited image area that is a target image to be adjusted in the sharpness (S601), and (c32) from outside It is preferable to include the step (S604) of adjusting the sharpness of the edited image area in accordance with the setting.

In this case, in the step (c31), the editing area is divided into at least one or more blocks, and edge filtering is performed on a block basis, as in a conventional edge detection method to detect and edit the strongest edge of the editing area. It is desirable to find the image area.

In the step (c32), it is preferable to adjust the sharpness by performing at least one of adjusting the edge or adjusting the contrast. At this time, it is preferable to adjust the edge by multiplying the detected edge by a gain value, and to adjust the contrast by adjusting a setting value of the optical black. Herein, the edge becomes stronger as the gain value increases, and the contrast increases as the value of optical black increases.

In the present embodiment, the contrast is adjusted by adjusting the setting value stored in the register for setting the optical black in the DSP (Digital Signal Processor) element used as the digital signal processor (507 in FIG. 4) for image processing. Can be done.

In addition, (c3) step (S206) is to display the modified image on the image display device (S605) to allow the user to confirm whether or not to correct, and if it is determined that further correction is necessary (S606) step (c32) ( It is preferable to further include a step that can be performed to perform S604) again.

9A to 12 illustrate examples of image correction by a brightness adjustment method by histogram equalization among the image correction methods of the digital camera of FIG. 6.

Referring to the drawings, FIGS. 9A and 9B schematically illustrate an image and a histogram before the image is corrected by the image correcting method of the digital camera of FIG. 6. In this case, it can be seen that the face part is dark overall in the playback mode after shooting. Therefore, it is necessary to uniformly distribute the luminance values of the predetermined region by histogram equalization by the luminance values of the face regions.

To this end, according to the image correction method according to the present invention for the entire screen shown in Figure 9a, in the case of the correction mode according to the user's selection whether or not to modify the entire image displayed on the image display device (S201) (S202) The editing area is selected by digital zooming from the entire image area (S203).

Next, brightness adjustment is performed by a correction method that is determined according to a selection input from the outside (S204). 10A to 10C schematically illustrate histograms of an edited region selection, an edited image region detection, and a selected edited image region before modification in the method of image correction of the digital camera of FIG. 6, respectively. To this end, in FIG. 10A, the editing area is selected by digital zooming on the area including the face part to be corrected.

Next, as illustrated in FIG. 10B, the editing area is divided into a plurality of blocks, and edge filtering is performed in units of blocks to detect the edited area by detecting the strongest edge of the editing area, that is, the face part. Next, a luminance value is detected for the detected edited image area, and a histogram is formed based on this. In the present embodiment, as shown in FIG. 10B, the face area is generally darkened, so that the face of the face is not easily distinguished, but the frequency is intensively distributed in the low luminance area of FIG. 10C.

Next, the brightness is controlled by selecting a suitable luminance region according to a value input from the outside and performing histogram equalization to uniformly distribute the values. 11A and 11B schematically illustrate histograms of an edited image region and a modified image modified by an image correcting method of a digital camera according to the present invention. In particular, in the histogram of FIG. 11B, it can be seen that the frequency of regions with lower luminance is dispersed as compared with the histogram of FIG. 10C. Thus, as shown in FIG. 11A, it can be seen that the dents of the face part are seen to some extent. The entire image modified by this image modification method is as shown in FIG. 12.

According to the present invention, an image can be directly edited after shooting without moving the image data to a separate editing device such as a personal computer. In addition, the edited image can be directly printed or transferred to another medium by directly editing the image without moving the image data to another editing device. Therefore, in view of the current technical trend in which wireless transmission technology is actively applied, user convenience can be achieved.

The method of adjusting the focus of a digital camera according to the present invention is not only a digital camera, but also a digital still camera (Digital Still Camera, DSC), a digital video camera (DVC), a mobile phone that require automatic or manual focus adjustment. It can be applied to various image acquisition devices such as a camera (phone camera). However, in the present specification, the present invention is disclosed based on a digital still camera as a typical example to which the present invention may be applied.

According to the image correction method of the digital camera according to the present invention, the image can be directly edited after shooting without moving the image data to a separate editing device such as a personal computer.

In addition, the image can be directly edited without moving the image data to another editing device so that the edited image can be directly printed or transferred to another medium.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and those skilled in the art may realize various modifications and other equivalent embodiments therefrom. I can understand. Accordingly, the true scope of protection of the invention should be defined only by the appended claims.

Claims (15)

(a) displaying an image on an image display device; (b) enlarging and selecting an editing region to be edited among all image regions displayed on the video display device; And (c) modifying the image of the editing area by performing at least one of brightness adjustment for adjusting the brightness of the image in the editing area and sharpness control for adjusting the sharpness of the image in the editing area. How to fix image. The method of claim 1, In step (b), Image modification of a digital camera which enlarges a specific area of the image at a set ratio and displays the enlarged area, and moves the enlarged area up, down, left and right in the entire image area, and selects the enlarged area as the editing area. Way. delete The method of claim 1, In step (c), (c1) determining a correction method for correcting an image in the editing area, (c2) adjusting the brightness of the image in the editing area, and (c3) adjusting the sharpness of the image in the editing area. The method of claim 4, wherein In the step (c2), the luminance value of the image in the editing region is detected to form a histogram, and the image is modified to uniformly distribute the luminance value of the selected luminance region according to the setting from the outside to improve the brightness of the image. How to modify the image of the digital camera you are adjusting. The method of claim 5, In step (c2), (c21) detecting an edited image area of the edited area, the target image of which brightness is to be adjusted; (c22) detecting a histogram by detecting a luminance value in the edited image area, and (c23) modifying the image so that the luminance values of the set luminance region are evenly distributed in the histogram. The method of claim 6, In step (c21), the image correction method of the digital camera obtaining the edited image area by detecting the strongest edge of the edit area. The method of claim 7, wherein Dividing the edit area into at least one block, and performing edge filtering on a block basis to detect a portion having the strongest edge among the edit areas. The method of claim 5, And the histogram detects a luminance value at each pixel in the edited image area and is formed by a relationship between the respective luminance value and the frequency of the luminance value. The method of claim 4, wherein In step (c3), (c31) detecting an edited image region, which is a target image to which sharpness is to be adjusted, among the edited regions, and (c32) adjusting the sharpness of the edited image area according to a setting from the outside. The method of claim 10, In step (c31), the editing area is divided into at least one or more blocks, and edge filtering is performed in units of blocks to detect an edited image area by detecting the strongest edge of the editing area to obtain the edited image area. Way. The method of claim 11, And adjusting the sharpness by performing at least one of adjusting the edge or adjusting the contrast. The method of claim 12, And adjusting the contrast by multiplying the detected edge by a gain value, and adjusting the contrast by adjusting a setting value of optical black. A recording medium on which a program implementing the method of modifying an image of a digital camera according to any one of claims 1, 2 and 4 to 13 is recorded. A digital camera to which the image correction method of the digital camera of any one of claims 1, 2 and 4 to 13 is applied.

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