KR20090026938A - Apparatus and method for comparing images in digital image processing device - Google Patents

Abstract

An apparatus for comparing two images in a digital image processor is provided to display a specific region of the two images and to display the image. An apparatus for comparing two images in a digital image processor comprises the followings: a digital signal processor(39) setting up a comparing area after reproducing a first image; a digital signal processor displaying the comparing area of the first and a second image; a comparing area setting unit(39-1) controlling size or a location of the area; and a information display unit(39-2) indicating red/green/blue histogram information or photographing information etc in region.

Description

Apparatus and method for comparing images in digital image processing device}

The present invention relates to an apparatus and method for digital image processing, and more particularly, to an apparatus and method for comparing images in a digital image processor for displaying a specific region of two captured images together.

In general, in order to compare specific areas of two images captured by a digital image processing apparatus, it is inconvenient to compare the comparison area between the current image and the target image by using a button or a dial to select an area and to directly move the position. Do.

The technical problem to be achieved by the present invention is to first set a comparison region for the first captured image, to place the target image to be compared in the comparison region to shoot, and then to display the comparison region of the two images on a screen The present invention provides an apparatus and method for comparing images in a processor.

In the digital image processor to solve the technical problem to be solved by the present invention, the image comparison apparatus plays a first image to set a comparison region, and displays the set comparison region on a live view screen of the second image. When the image is captured, it is preferable to include digital signal processing means for simultaneously displaying the comparison region of the first and second image.

In the present invention, the digital signal processing means further comprises a comparison area setting unit for adjusting the size or position of the comparison area.

The digital signal processing means may further include an information display unit displaying RGB histogram information, photographing information, or the like for each of the comparison areas of the simultaneously displayed first and second images.

According to an aspect of the present invention, there is provided a method of comparing images in a digital image processor, the method comprising: (a) reproducing a first image to set a comparison area; (b) displaying the set comparison area on a live view screen of a second image; And (c) simultaneously displaying the comparison areas of the first and second images when the second image in which the comparison area is displayed is photographed.

In the present invention, the size and position of the comparison area can be adjusted.

The method may further include displaying RGB histogram information, photographing information, or the like for each of the comparison areas of the simultaneously displayed first and second images.

According to the present invention, a comparison region is set in advance with respect to a photographed image, a target image to be compared is photographed by being placed in the comparison region, and a comparison region of two images is displayed on one screen, thereby specifying two images. The areas can be easily compared by the user without any other manipulation.

In addition, when capturing a whole body image, if the face part is set as a comparison area, the face photographing state can be easily compared with the setting of the digital image processing apparatus.

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

1 is a perspective view showing the front and the top of the digital image processing apparatus.

The shutter release button 11 is opened and closed to expose the CCD or film to light for a predetermined time, and records the image on the CCD by properly exposing the subject in conjunction with an aperture (not shown).

The shutter release button 11 generates the first and second image capturing signals by a photographer input. When the first shutter release button 11 as a half shutter signal is input, the digital image processing apparatus focuses and adjusts the amount of light, and when the focus is achieved, the green light is turned on in the display unit 25. . When focus is achieved by the input of the first shutter release button 11 and the amount of light is adjusted, the second shutter release button 11 as a full shutter signal is input to capture an image.

The power button 13 is input to supply power to and operate the digital image processing apparatus.

The flash 15 brightens the bright light instantly when shooting in a dark place. Flash modes include auto flash, forced flash, flash off, red-eye reduction, and slow synchro.

The auxiliary light 17 supplies light to the subject so that the digital image processing apparatus automatically focuses quickly and accurately when the amount of light is insufficient or at night.

The lens unit 19 receives light from an external light source and processes an image.

FIG. 2 is a rear view of the rear surface of the digital image processing apparatus shown in FIG. 1. The wide-zoom button 21w, the tele-zoom button 21t, the display unit 23 and the touch sensor or the contact switch may be The provided input buttons B1 to B14 (hereinafter referred to as buttons B1 to B14) are provided.

The wide-angle zoom button 21w or the tele-zoom button 21t increases the angle of view or narrows the angle of view depending on the input, particularly when the size of the selected exposure area is changed. When the wide-zoom button 21w is input, the size of the selected exposure area is reduced, and when the tele-zoom button 21t is input, the size of the selected exposure area is increased.

The buttons B1 to B14 are provided in the horizontal column and the vertical column of the display unit 23. The buttons B1 to B14 provided in the horizontal and vertical columns of the display unit 23 are provided with a touch sensor (not shown) or a contact switch (not shown).

That is, the buttons B1 to B14 are provided with a touch sensor to move up / down / left / right in a state where the buttons B1 to B7 in the horizontal row or the buttons B8 to B14 in the vertical row are touched. You can select any value (eg, color or brightness) from the items, or activate the submenu icons included in the main menu icon.

In addition, the button frame (B1 ~ B14) is provided with a contact switch, it is possible to directly select the main menu icon and sub-menu icon to execute the corresponding function. The touch sensor requires only a weak touch relative to the contact switch input, but the contact switch input requires a relatively strong touch compared to the touch sensor input.

3 is a block diagram showing the configuration of a digital image processing apparatus having an electronic diary function, which includes a display unit 23, a user input unit 31, an imaging unit 33, an image processing unit 35, a storage unit 37, And a digital signal processor 39.

The user input unit 31 has a shutter release button 11 that opens and closes to expose the CCD or film to light for a predetermined time, a power button 13 that inputs to supply power, and widens the angle of view according to the input, Wide-zoom button (21w) and tele-zoom button (21t) to narrow the display, and a touch sensor or contact type provided in horizontal and vertical columns around the display unit 23 for text input or menu selection and execution. There are buttons buttons B1 to B14 equipped with a switch.

The imaging unit 33 includes a shutter, a lens unit, an aperture, a charge coupled device (CCD), and an ADC, which are not shown in the figure. The shutter is a mechanism for adjusting the amount of light exposed together with the aperture. The lens unit receives light from an external light source and processes an image. At this time, the iris adjusts the amount of light incident (light quantity) according to the degree of opening and closing. The opening and closing degree of the iris is controlled by the digital signal processing unit 39.

The CCD accumulates the amount of light input through the lens unit and outputs an image captured by the lens unit in accordance with the accumulated light amount in accordance with the vertical synchronization signal. Image acquisition of the digital image processing apparatus is performed by a CCD that converts light reflected from a subject into an electrical signal. In order to obtain a color image using a CCD, a color filter is required, and most of them employ a filter (not shown) called a color filter array (CFA). CFA has a structure arranged regularly by passing only one color light per pixel, and has various shapes according to the arrangement structure. The ADC converts an analog video signal output from the CCD into a digital signal.

The image processor 35 performs signal processing to display the digitally converted RAW data. The image processor 35 removes the black level caused by the dark current generated by the CCD and the CFA filter that are sensitive to the temperature change. The image processor 35 performs gamma correction to encode information according to nonlinearity of human vision. The image processor 35 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 image processing unit 35 converts the interpolated RGB signal into a YUV signal and filters the Y signal by a high band filter to clearly process 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 35 compresses and signals the Y, U, and V signals from which the noise is removed to generate a JPEG file, and the generated JPEG file is displayed on the display unit 23 and stored in the storage unit 37. . All of the operations of the image processor 35 operate under the control of the digital signal processor 39.

The digital signal processor 39 sets a comparison area by reproducing the previously captured image or the stored image (hereinafter referred to as a first image), and sets the comparison region as an image to be captured next (hereinafter referred to as a second image). ), And when the second image is captured, the comparison area of the first image and the second image is simultaneously displayed.

To this end, the digital signal processing unit 39 includes a comparison area setting unit 39-1 and an information display unit 39-2.

When the first image is reproduced on the display unit 23 as shown in FIG. 5A, the comparison area setting unit 39-1 sets the comparison area by user input. 5B shows a comparison area set in the first image. The size or position of the comparison area can be changed by user setting. For example, the size of the comparison area can be adjusted by the input of the wide-angle zoom button 21w, the tele-zoom button 21t, or the buttons B1 to B14 to which the comparison area setting function is added.

Subsequently, when the live view screen of the second image is displayed on the display unit 23, the digital signal processor 39 displays a comparison area on the live screen of the second image as illustrated in FIG. Make it easy to see.

When the comparison object of the second image enters into the comparison area, photographing is performed. When the second image photographing is completed, the digital signal processing unit 39 displays the first image in accordance with the size of the display unit 23 as illustrated in 5d. And enlarge and display the comparison area of the second image.

In addition, according to a user's selection, the information display unit 39-2 calculates and displays RGB histogram information or photographing information for each of the comparison regions of the first and second images that are simultaneously displayed. 5E illustrates an RGB histogram of a comparison area of enlarged first and second images. Therefore, the color, gray level, etc. of the comparison area of the first and second images can be easily confirmed without other manipulations. In addition, it is possible to delete an image in a comparison state.

Hereinafter, an image comparison method in the digital image processor according to the present invention will be described in detail with reference to FIG. 4. In the digital image processor according to the present invention, the image comparison method may be performed inside the image processor as shown in FIG. 3. According to an embodiment, the main algorithm of the operation method may be performed by assisting peripheral components in the device. It may be performed in the processor 39.

First, when the user inputs the first image selection playback signal as the previously photographed image or the stored image, the digital signal processor 39 receives it and reproduces the first image on the display unit 23 (step 401). 5A illustrates an arbitrary first image reproduced on the display unit 23.

When the first image is displayed, the comparison area is displayed on the display unit 23, and the user sets the comparison area by adjusting the size and position of the comparison area so that the comparison object of the first image is at the center of the comparison area (403). step). The comparison area setting unit 39-1 changes the size of the comparison area according to a user setting. The size of the comparison area can be adjusted by the input of the wide-angle zoom button 21w, the tele-zoom button 21t or the buttons B1 to B14 to which the comparison area setting function is added. 5B illustrates a comparison area set in the first image.

When the comparison area is set, the set comparison area is displayed on the comparison target image, that is, the live view screen for capturing the second image (step 405). 5C shows a comparison area displayed on the live screen of the second image. In this way, the comparison area is displayed on the live screen of the second image so that the user can easily know the comparison target.

When the comparison target of the second image is positioned in the comparison area set by the manipulation of the buttons 21w, 21t, and B1 B1 to B14, the user inputs the shutter-release button 11, and the digital signal processor 39 In operation 407, the second image is captured by receiving the image.

When the second image capturing is completed, the digital signal processor 39 enlarges and displays the comparison area of the first and second images in accordance with the size of the display unit 23 (step 409). FIG. 5D illustrates a comparison area of the first and second images enlarged and displayed according to the size of the display unit.

Subsequently, by the user selection signal, the information display unit 39-2 calculates and displays the RGB histogram information, the photographing information, and the like, for each of the comparison regions of the first and second images displayed at the same time. 5E shows an RGB histogram of a comparison area of the enlarged first and second images. Therefore, the color, gray level, etc. of the comparison area of the first and second images can be easily confirmed without other manipulations. In addition, it is possible to delete an image in a comparison state.

1 is a perspective view showing the front and the top of the digital image processing apparatus.

FIG. 2 is a rear view illustrating a rear shape of the digital image processing apparatus of FIG. 1.

3 is a block diagram showing the configuration of an image comparison device in a digital image processor according to the present invention.

4 is a flowchart illustrating a configuration of an image comparison method in a digital image processor according to the present invention.

FIG. 5 is a diagram illustrating an embodiment for explaining image comparison in the digital image processor illustrated in FIGS. 3 and 4.

Claims (6)

Set the comparison area by playing back the first image, and display the set comparison area on the live view screen of the second image to display the comparison area of the first and second images simultaneously when the second image is captured. An image comparison device in a digital image processor comprising signal processing means. The method of claim 1, wherein the digital signal processing means And a comparison area setting unit configured to adjust a size or a position of the comparison area. The method of claim 1, wherein the digital signal processing means And an information display unit for displaying RGB histogram information, photographing information, or the like, for each of the comparison regions of the simultaneously displayed first and second images. (a) reproducing the first image to set a comparison area; (b) displaying the set comparison area on a live view screen of a second image; and (c) simultaneously displaying the comparison regions of the first and second images when the second image in which the comparison region is displayed is photographed. The method of claim 4, wherein The image comparison method of the digital image processor, characterized in that the size or position of the comparison region can be adjusted. The method of claim 4, wherein And displaying RGB histogram information, photographing information, or the like, for each of the comparison regions of the simultaneously displayed first and second images.

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