KR101298638B1 - Method for processing digital image - Google Patents

Abstract

The present invention relates to a method of operating a digital image processing apparatus, and more particularly, to perform a plurality of photographing on the same subject, and to display a plurality of photographed images at the same time to allow a user to select and store a desired image It relates to a processing method. In the digital image processing method, the camera shake correction photographing and flash emitting photographing are performed with a single shutter input on the same subject, the first image stabilized and the second flash photographing image are reduced and displayed simultaneously. And store the first image or the second image or the first and second images.

Description

Digital image processing method {Method for processing digital image}

1 is a block diagram of a digital image processing apparatus according to the present invention.

2 is a flowchart illustrating an operation of a digital image processing method according to a first embodiment of the present invention.

FIG. 3 is a diagram illustrating first and second images simultaneously displayed on the display unit by the operation of FIG. 2.

4 is a flowchart illustrating an operation of a digital image processing method according to a second embodiment of the present invention.

The present invention relates to a method of operating a digital image processing apparatus, and more particularly, to perform a plurality of photographing on the same subject, and to display a plurality of photographed images at the same time to allow a user to select and store a desired image It is about a processing method.

The image captured by the photographer holding the digital image processing apparatus by hand generates small shaking, that is, hand shaking. Furthermore, camera shake becomes more severe when shooting subjects in low light. In recent years, since the digital image processing device is becoming more magnified and pixelated, hand shaking becomes more severe than ever before, and as more images are taken on the move, the resolution of the hand shaking problem becomes an important factor in obtaining a clear image. It became.

In order to solve such a shake, a flash emission photographing is performed, or an electronic hand shake correction method or an optical hand shake correction method is used.

Since the user must select and photograph only one of the above methods, images in the case of photographing by selecting another method had to be abandoned. Alternatively, they used different methods to shoot images, save images, and display the stored images to delete unwanted images. However, in case of storing images by photographing in different ways, there is a problem in that a time difference occurs in accordance with each image processing time and the same scene cannot be obtained.

The technical problem to be achieved by the present invention is to provide a digital image processing method that can perform image stabilization photographing and flash photographing about the same subject at about the same time, and display a plurality of photographed images at the same time to store the selected image .

Another technical problem to be achieved by the present invention is to perform a short exposure shooting and a long exposure shooting for the same subject at the same time during the image stabilization shooting, and to display the plurality of images taken at the same time to store the selected image It is to provide a digital image processing method.

According to an aspect of the present invention, there is provided a digital image processing method including: (a) performing image stabilization and flash emission photographing with a single shutter input on the same subject; (b) reducing and simultaneously displaying the first image captured by the camera shake correction image and the second image captured by the flash emission; And (c) storing the selected first or second image or first and second images.

In the present invention, the camera shake correction shooting is characterized in that to perform a short exposure shooting and a long exposure shooting to the subject in sequence.

In the present invention, the first image is generated by synthesizing the images of the short exposure photographing and the long exposure photographing.

In the present invention, the camera shake correction first image, the flash emission second image, and the third image by the long exposure photographing are displayed, and any image selected from the first to third images is displayed. Characterized in that for storing.

According to another aspect of the present invention, there is provided a digital image processing method comprising the steps of: (a) performing long exposure photographing and short exposure photographing with one shutter input to the same subject; (b) storing a first image generated by the long exposure shooting; (c) synthesizing the first image and the image taken by the short exposure to generate a hand shake correction second image; (d) reducing and simultaneously displaying the first image and the second image; And (e) storing the selected first or second image or the first and second images.

In the present invention, the long exposure photographing and the short exposure photographing are set by the shutter speed or / and the aperture value.

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

1 is a block diagram of a digital image processing apparatus according to the present invention, which includes a shutter input unit 100, a flash 115, a lens unit 120, an aperture 125, a charge coupled device (CCD) 130, and an ADC ( 135, an image processor 140, a storage 145, a display 150, and a controller 155.

The shutter 100 is a mechanism for adjusting the amount of light exposed together with the aperture 125. The shutter is not only a function of light control but also plays a very important role as a creative expression tool. In sports photography as well as in art photography, fast and slow shutter image reproduction creates a different atmosphere.

The flash 115 is used to correct light when there is not enough light at the time of photographing a subject. The flash 115 may perform flash emission automatically or manually under the control of the controller 155.

The lens unit 120 receives light from an external light source and processes an image. At this time, the diaphragm 125 adjusts the amount of light incident (light quantity) according to the degree of opening and closing. The opening and closing degree of the diaphragm 125 is controlled by the controller 155.

The CCD 130 accumulates the amount of light input through the lens unit 120 and outputs the image captured by the lens unit 120 according to the accumulated light amount in accordance with the vertical synchronization signal. Image acquisition of the digital image processing apparatus is performed by the CCD 130 for converting light reflected from a subject into an electrical signal. To obtain a color image using the CCD 130, a color filter is required, and a filter (not shown) called CFA (Color filter array) is mostly adopted. CFA has a regularly arranged structure that passes only light that represents one color per pixel, and it has various forms according to the arrangement structure.

The ADC 135 converts an analog video signal output from the CCD 130 into a digital signal.

The image processor 140 performs signal processing to display a digitally converted image signal. The detailed operation of the image processor 140 will be described below.

The device used in the CCD 120 and the CFA filter is sensitive to a change in temperature and generates a dark current according to the changed temperature, which includes an unwanted black level in the image signal. Thus, the image processor 140 removes the black level generated by the dark current as described above.

The image processor 140 also performs gamma correction. Since human vision reacts nonlinearly to brightness according to Weber's law, when a given bit depth is given, linearly recording the brightness of the light will cause posterization. This happens. Therefore, in order to show the maximum image quality under a given bit depth, it is necessary to encode using a nonlinear function. As described above, encoding information in accordance with nonlinearity of human vision is referred to as gamma correction. The gamma correction of the image processor 140 gamma corrects and outputs an image signal input by the gamma curve. For example, the input luminance level of the 12-bit image signal is corrected to 8-bit luminance level.

The image processor 140 performs CFA interpolation to interpolate the Bayer pattern implemented by the RGRG line and the GBGB line of the gamma corrected predetermined data into the RGB line. The CFA interpolation of the image processor 140 first restores the G channel from the pixels having only the R or B channel value, and then fills the empty values in the order of the B channel, the R channel, or the R channel, the B channel, and the R, G, B Restore three channels.

The image processing unit 140 converts the interpolated RGB signal into a YUV signal, filters the Y signal by a high-band filter, and sharply processes the image, and uses the standard color coordinate system to adjust the color values of the U and V signals. Perform color correction to correct and remove their noise.

The image processor 140 generates a JPEG file by compressing and signal-processing Y, U, and V signals from which noise is removed, and the generated JPEG file is displayed on the display 150, and the storage unit 145 is selected by a user. Are stored in.

All of the operations of the image processor 140 operate under the control of the controller 155.

In conjunction with the digital image processing apparatus shown in FIG. 1, image stabilization and flash photographing are performed almost simultaneously with the same subject, or short exposure photographing and long exposure photographing are performed with respect to the same subject during image stabilization photographing. An operation of the control unit 155 for performing the digital image processing method of the present invention, which can simultaneously perform and simultaneously display a plurality of images to store a selected image, will be described below.

2 is a flowchart illustrating an operation of a digital image processing method according to a first embodiment of the present invention.

In order to perform a plurality of shots by inputting the shutter 100 once for the same subject, a simultaneous shooting menu, which is a corresponding menu, is selected (step 200).

The simultaneous shooting menu may be provided in a button or dial form outside the digital image processing apparatus, or may be set by selecting a text menu displayed on the display unit 150 by inputting a menu button.

The controller 155 that receives the simultaneous shooting menu selection signal switches the digital image processing apparatus to the corresponding mode and waits until the shutter 100 input signal is received.

Subsequently, when the shutter 100 is input by the user, the controller 155 performs camera shake correction photographing and flash emission photographing on the same subject (step 205).

In response to the shutter 100 input signal, the controller 155 performs image stabilization photographing and flash emission photographing at about the same time. For the hand shake correction photographing, the controller 155 performs short exposure photographing and long exposure photographing. Here, short-exposure shots take a short exposure to shoot a subject. Shooting with a small shutter speed or aperture value, for example, shooting at a shutter speed of 1/250 sec or more, or f1.2 -f2.8 indicates shooting. Long exposures are shots that take a long exposure and shoot the subject. Shooting with a large shutter speed or aperture value, for example, shooting at shutter speeds between 1/30 sec.-1 / 125 sec. It indicates the shooting is performed by setting to f4-8. In flash emission photography, the controller 155 operates the flash 115 to correct light on a subject, which is the same as performing long exposure photography by operating the flash. As described above, the controller 155 performs three photographing operations by inputting the shutter 100 once.

The controller 155 controls the image processor 140 to process an image on the first image generated by the image stabilization photographing and the second image generated by flash emission photographing (step 210).

The image processor 140 generates the first image by image stabilization photographing under the control of the controller 155 as follows. The image processor 140 extracts the edge components from the image obtained by the short exposure photographing, extracts the color components of the image obtained by the long exposure photographing, and combines the two to generate a first image of image stabilization. The image processor 140 performs an image processing operation as described above with respect to the first image and the second image, and performs an operation of reducing the image to be simultaneously displayed on the display unit 215.

When the image reduction is completed, the controller 155 simultaneously displays the reduced first image and the second image on the display unit 150 (step 215).

3 shows a first image and a second image simultaneously displayed on the display unit 150. FIG. 3A shows a first image in which camera shake is generated by correction photographing, and FIG. 3B shows a second image generated by flash emission photographing.

The selected image among the displayed first and second images is stored in the storage unit 145 (step 220).

By the user selection, the controller 155 may simultaneously store the first image and the second image in the storage 145 or only one image in the storage 145, and the unselected images are deleted.

In another embodiment, three images may be simultaneously displayed on the display unit 150. The first image produced by image stabilization shooting combined with short exposure and long exposure shooting, the second image created by flash emitting photography, and the third image produced by the long exposure shooting, commonly referred to as normal shooting, are simultaneously The selected image may be displayed and stored in the storage 145.

4 is a flowchart illustrating an operation of a digital image processing method according to a second embodiment of the present invention. FIG. 3 displays a plurality of images during image stabilization shooting and flash emission shooting so that the user selects a desired image, while FIG. 4 displays a plurality of images during image stabilization shooting to allow a user to select an image. To choose. In the description of FIG. 4, the same content mentioned above will be omitted.

First, in order to perform multiple shots by inputting the shutter 100 once for the same subject, the camera shake correction shooting menu, which is a corresponding menu, is selected (step 400).

The controller 155 having received the image stabilizer shooting menu selection signal switches the digital image processing apparatus to the corresponding mode, and waits for the input signal of the shutter 100 to be received.

Subsequently, when the shutter 100 is input by the user, the controller 155 performs image stabilization shooting on the same subject (step 405).

Here, the image stabilization photographing means short exposure photographing and long exposure photographing as mentioned above. The controller 155 performs short exposure photographing and long exposure photographing at the same time with one shutter input.

Subsequently, the controller 155 stores the image generated by the short exposure photographing and the image generated by the long exposure photographing in the storage unit 145 (step 410).

When image storage is completed, the control unit extracts edge components from the image generated by the short exposure shooting, extracts the color components from the image generated by the long exposure shooting, and combines them to generate the first image stabilizer. The storage is stored in the storage unit 145 (step 415).

Thereafter, the controller 155 reduces the first image corrected by the hand shake and the second image generated by the long exposure photographing and simultaneously displays it on the display unit 150 (step 420).

The selected image among the displayed first and second images is stored in the storage unit 145 (step 425).

By the user selection, the controller 155 may simultaneously store the first image and the second image in the storage 145 or only one image in the storage 145, and the unselected images are deleted.

As described above, according to the present invention, the camera shake correction and flash shooting are performed at substantially the same time with respect to the same subject, or the short exposure shooting and the long exposure shooting are performed at the same time with respect to the same subject at the same time. By simultaneously displaying the images of the to store the selected image, it is possible to select and store the desired image among a plurality of images photographed in a variety of ways to create an effect that can further enhance the reliability of the imaging device.

So far I looked at the center of the preferred embodiment for the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

Claims (8)

(a) performing image stabilization and flash emission photographing on the same subject with one shutter input; (b) simultaneously displaying the captured images; And (c) storing the selected image or all. delete The method of claim 1, wherein the camera shake correction (a) performing first exposure photographing and second exposure photographing on the subject; And (b) combining the images obtained by the first exposure photographing and the second exposure photographing to form the image stabilized photographed image. In the first exposure shooting, the shutter speed is set to 1/250 seconds or more, or the aperture value is set to f1.2 to f2.8 to perform shooting. And the second exposure photographing is performed by setting the shutter speed to 1/30 to 1/125 second or setting the aperture value to f4 to f8. The method of claim 3, Displaying the image stabilized first image, the flash emission second image, and the second exposure-photographed third image, and storing any or all selected ones of the first to third images Digital image processing method comprising a. (a) performing first exposure photographing and second exposure photographing with one shutter input on the same subject; (b) storing a first image generated by the second exposure imaging; (c) synthesizing the first image and the image photographed by the first exposure to generate a second image with image stabilization; (d) reducing and simultaneously displaying the first image and the second image; And (e) storing the selected first image and / or second image, the method comprising: In the first exposure shooting, the shutter speed is set to 1/250 seconds or more, or the aperture value is set to f1.2 to f2.8 to perform shooting. And the second exposure photographing is performed by setting the shutter speed to 1/30 to 1/125 second or setting the aperture value to f4 to f8. The method according to claim 3 or 5, And the first exposure photographing adjusts sensitivity. delete delete

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