KR101008488B1 - Image Processing Apparatus and Control Method Thereof - Google Patents

Abstract

The present invention relates to an image signal processing apparatus and method capable of processing color picking on an image input through a photographing device or a monochrome image obtained by converting an input image into monochrome, and more particularly, a broadcast photographing apparatus manually operated. The focus of the image input through the gradation using a plurality of colors for each depth is expressed on the outside or the surface of the subject and then output through the display device provided in the broadcast photographing apparatus, so that the operator can adjust the focus of the subject more precisely. The present invention relates to a video signal processing apparatus and method.

An image signal processing apparatus according to the present invention includes an image signal input unit for receiving an image signal output while photographing a subject and outputting the image signal as a component video signal; And a color picking signal generator for outputting a color picking signal for expressing a focus state of the subject as a gradation using a plurality of colors using a luminance signal among the component video signals.

Color, peaking, focus, shoot, camera

Description

Image Processing Apparatus and Control Method Thereof}

The present invention relates to an image signal processing apparatus and method capable of converting an image input through a photographing apparatus into black and white, and then processing color peaking on a black and white image, and more specifically, to a subject through a broadcast photographing apparatus manually operated. In the photographing process, the gradation using a plurality of colors is expressed on the outer surface or the surface of the subject, and then output to the display device provided in the broadcast photographing apparatus, so that the operator can adjust the focus on the subject more precisely. The present invention relates to an image signal processing apparatus and a method which can be adjusted.

The view finder included in the camera color-decomposes an image of a subject incident on the imaging lens (lens: 1), and the color-decomposed image generates three primary color image signals AR, AG, and AB by the imaging device 2. do. The video signals AR, AG and AB of these three primary colors are amplified by a video amplifier 3 and input to the A / D converter 4.

The A / D converter 4 converts each of the three primary video signals AR, AG, and AB into DR, DG, and DB digital video signals and outputs them to the digital signal processor 5.

The digital signal processing unit 5 faces the DR, DG, and DB image signals, applies digital signal processing including matrix processing, generates the luminance signal DY, the chroma signal DU, and the DV. Output to the D / A converter 6. The D / A converter 6 converts the digital luminance signal DY and the chroma signals DU and DV into analog luminance signals AY and chroma signals AU and AV.

The analog luminance signals AY and chroma signals AU and AV generated in the camera section are output to the video amplifier 7 of the view finder section.

The video amplifier 7 amplifies an analog luminance signal AY and chroma signals AU and AV and outputs them to a low pass filter 8.

The low pass filter 8 restricts the luminance signal AY and the chroma signals AU and AV to a predetermined frequency band and outputs it to the A / D converter 9.

The A / D converter 9 converts the analog luminance signal AY and the chroma signals AU and AV into digital luminance signals AY and the chroma signals AU and AV, and outputs them to the matrix unit 10. do.

The matrix unit 10 converts the luminance signal AY and the chroma signals AU and AV into digital signals DR, DG and DB video signals, and the video signal DR is added to the adder circuit 13, and the video signal DG is added to the adder circuit. At 14, the video signal DB is output to the addition circuit 15, and at the same time, the DR, DG, and DB are output to the peaking signal generator 11. As shown in FIG.

The peaking signal generation unit 11 receives the peaking signal corresponding to the color of the contour correction of the subject based on the color (mixing ratio) setting signal supplied from the CPU 17. And DB image signals.

In the peaking signal generator 11, the generated peaking signal is output to the multiplication circuit 12, and the peaking signal is generated by a peaking level setting signal and a peaking level setting signal. The leveling (peacking level) is adjusted.

Then, the peaking signal whose peaking level is adjusted by the peaking level setting signal is a digital video signal DR and an addition circuit 13 output from the matrix unit 10. ) Is added to the video signal DG and the video signal DB that have been processed, and output to the OSD adder 16 as video signals Rpk, Gpk, and Bpk.

It is possible to perform color selection of peaking (contour correction) by the OSD control signal output from the CPU 17 by the OSD adding section 16. In the OSD adder 16, a user can manipulate a setting menu superimposed on an image signal by an OSD control signal, so that picking color can be selected and the picked signal is The display element 19 is displayed on the display element 19 via the display element driver 18.

According to the present invention, in capturing an image using a broadcast camera for manual operation, color picking is processed on an image input through the photographing device or an image converted into black and white, and a plurality of focuses of the image are provided for each depth. It is an object of the present invention to provide an image signal processing apparatus and method which can improve the visibility of a picking signal by selecting a color and displaying the gray level representation.

The object of the present invention is a video signal input unit for receiving a video signal output while photographing a subject to output a component video signal; And a color peaking signal generator for outputting a color peaking signal for expressing a focus state of the subject in gray using a plurality of colors using a luminance signal among the component video signals. do.

Accordingly, the image signal processing apparatus and method of the present invention processes color picking on an image input through the photographing apparatus or an image converted into black and white, and selects a plurality of colors by depth for focusing on the image By displaying in a representation, there is a remarkable effect that the operator who operates the photographing apparatus can easily adjust the focus by improving the visibility of the picking signal.

And, the image signal processing apparatus and method of the present invention by showing the input image and the color picked image together, there is an advantageous effect that the operator can easily identify a plurality of subjects being photographed.

In addition, the video signal processing apparatus and method of the present invention has an advantage that the operator can be portable by using a video signal input terminal, and can be used in connection with other photographing apparatus.

The terms or words used in this specification and claims are not to be construed as being limited to their ordinary or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best describe their invention. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

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

The video signal processing apparatus according to the present invention may be integrally provided with a broadcast photographing camera, or may be formed as a video signal processing apparatus that can be used by being connected to a photographing apparatus such as another general camera as independent hardware.

In the case of a separate independent video signal processing apparatus, a video signal input terminal may be included to receive a video signal output from a recording apparatus including a broadcast photographing camera or a digital camera.

2 is a block diagram of an image signal processing apparatus according to the present invention.

Signal processing performed in the image signal processing apparatus according to the present invention is as follows.

First, an image photographed through an image photographing apparatus such as a broadcast photographing camera is output as an image signal through a lens and an image pickup device. The video signal input unit 210 receives a video signal and outputs it as a component video signal.

The component video signal according to the present invention is a digital signal and includes a first luminance signal Y and a color difference signal Cb and Cr.

The output component video signals Y, Cb, and Cr are input to the image signal processor 220 and the color peaking signal generator 230.

The image signal processor 220 according to the present invention receives the first luminance signal Y and the color difference signals Cb and Cr output from the image signal input unit 210 and outputs the first image signals Ra, Ga, and Ba. And a black and white image signal generating means 222 for receiving the image signal generating means 221 and the first luminance signal Y and outputting the second image signals Rb, Gb and Bb having arbitrary luminance. In this case, the operator may change the luminance of the first luminance signal Y input using an externally connected input pad.

The first image signals Ra, Ga, Ba and the second image signals Rb, Gb, and Bb outputted from the color image signal generating unit 221 and the monochrome image signal generating unit 222 are respectively a video signal selecting unit ( 240).

The video signal selecting unit 240 according to the present invention includes a first video signal selecting means 241 and a second video signal selecting means 242, each of which is connected to a switch to allow the first video signal to be selected by an operator. (Ra, Ga, Ba) or second image signals Rb, Gb, and Bb may be output.

According to the present invention, the first or second video signal output from the first video signal selecting means 241 is input to the signal superimposing means 261 constituting the signal superimposing unit 260 and the second video signal selecting means 242. The first and second video signals outputted from the second input signal are input to the multiple video signal processing means 262.

Meanwhile, the component video signal input to the peaking signal generator 230 is input to the digital filter 231.

When the operator focuses on a specific subject during shooting, the contour of the subject becomes clear, and thus the high-band component is included in the luminance signal Y. The digital filter 231 operates to remove other interference signals included in the luminance signal Y and to pass only the luminance signal Y including the high band component so that the amount of displacement of the high frequency component is always at a predetermined level.

The operator can detect the amount of luminance displacement within a specific range using a digital filter and an input pad connected to the outside.

The digital filter 231 thus outputs the first peaking signal P1 including the high band component and information related to the luminance displacement amount. The output first peaking signal P1 is input to the gain adjusting means 232. At this time, by providing a noise attenuation means (not shown) between the digital filter 231 and the gain adjusting means 232, it is possible to reduce the noise along with the interference signal.

The gain adjusting unit 232 may measure the maximum value of the luminance displacement of the first peaking signal P1, adjust the gain so that the maximum value is always greater than or equal to a predetermined reference value, and then output the second peaking signal P2. In this case, the operator sets the reference value manually or automatically by using the input pad externally connected to the gain adjusting unit 232, thereby outputting the second peaking signal P2 in which the gain of the reference value or more is automatically adjusted. The output second peaking signal P2 is input to the color peaking signal output unit 233 and the peaking signal processing unit 250, respectively.

According to the embodiment of the present invention, when the operator sets the digital filter 231 and the gain adjusting means 232 to the automatic mode, the digital filter 231 is automatically set as a characteristic of the high band pass filter.

In addition, the operation band of the filter may be automatically moved according to a distribution of frequencies changed from a plurality of subjects constituting the image.

Therefore, if the degree of change of the relative high-band component is increased on the screen in which a plurality of subjects are seen, the image signal display unit 270, which will be described later, may be configured to adjust the degree of change in the frequency of minute frequencies occurring in other subjects other than the specific subject in focus on the screen. It is expressed by the change of color and the gradation of color. In this case, by overlapping the first or second video signal output from the first video signal selecting means 241 to increase the visual recognition of the colored picking, the operator can easily recognize the minute change of the picking and manually during the shooting. This can solve the difficulties that occur in the process of finely adjusting the focus.

The color peaking signal output unit 233 receives the second peaking signal P2 whose gain is adjusted by the gain adjusting unit 232 and calculates in real time a color and saturation value proportional to the intensity of the peaking signal ( R1, G1, B1) are output. The output color picking signals R1, G1, and B1 are input to the signal superimposing means 261 together with the first or second video signals output from the first video signal selecting means 241.

The signal superimposing means 261 receives the color picking signals R1, G1, and B1 and the first or second video signals, and superimposes the signals, and outputs the superimposed signals R2, G2 and B2.

According to an exemplary embodiment of the present invention, when a plurality of colors are reflected in the second picking signal, the color picking signals R1, G1, and B1 have a change in saturation according to the intensity of the color picking signal, that is, expressed in gray scale. can do. For example, when the operator sets the high intensity of the second peaking signal P2 to green and the low intensity to blue through the control means connected to the color peaking signal generation unit 230, It can be expressed by changing the density of colors from green to blue.

The color picking signals R1, G1, and B1 in which the plurality of colors are reflected or the plurality of colors are expressed in gray scale are input to the signal overlapping means 261.

Meanwhile, the second peaking signal P2 input to the peaking signal processing unit 250 is first input to the peaking amount accumulating means 251. The peaking amount accumulating means 251 receives the second peaking signal P2 and accumulates the peaking degree of the entire photographed image in units of frames, and then outputs the peaking amount accumulating signal P3 converted into a numerical value. The output peaking amount accumulation signal P3 is input to the peaking amount information signal processing means 252.

The picking amount information signal processing means 252 outputs the picking amount information signals R3, G3, and B3 including information expressed by geometric displacements such as graphs and the like contained in the picking amount accumulation signal P3. The output peaking amount information signals R3, G3, and B3 are displayed on the video signal display unit 270 via the multiple video signal processing means 262. At this time, the peaking amount information signal display device 272 is displayed in a predetermined size in the entire image region or a predetermined region selected by the operator.

The image processing apparatus according to the first embodiment of the present invention may be manufactured integrally with a broadcasting camera, so that the state of focus on the subject may be checked in real time while the operator is photographing.

First, when an operator turns on a switch connected to the first image signal selecting unit 241 to the outside, the first image signal Ra, Ga, Ba, which is an input color image signal, and the second image signal Rb, which is a black and white image signal, The second video signals Rb, Gb, and Bb are output from among, Gb and Bb.

The signal superimposing means 261 receives the color picking signals R1, G1, and B1 output from the color picking signal generator 230 together with the second video signals Rb, Gb and Bb which are monochrome video signals.

The signal superimposing means 261 outputs the third video signals R2, G2 and B2 in which the second video signals Rb, Gb and Bb, which are black and white video signals, and the color picking signals R1, G1 and B1 are superimposed. .

The multiple image signal processing means 262 receives the peaking amount information signals R3, G3, and B3 output from the peaking signal processing unit 250 together with the third image signals R2, G2 and B2, and receives the multiple image signals R4. , G4, B4) is output. The output multiple image signals R4, G4, and B4 are displayed to the operator via the image signal display unit 270.

The image displayed on the display device 272 is expressed in gray scales consisting of a plurality of colors according to the state of the focus attached to the monochrome image or the plurality of subjects constituting the image. At this time, the gray level of the color is expressed according to not only the focus state of the subject but also the texture of the surface of the subject.

If the operator turns off the switch connected to the first image signal selecting means 241, the color image is picked by curling and displayed to the operator.

That is, the video signal selector 240 according to the present invention includes a plurality of video signal selecting means 241 and 242. The video signal output from the first video signal selecting means 241 is picked and displayed. The video signal output from the two video signal selecting means 242 is displayed on the display device 272 without overlapping with the color picking signal.

Therefore, the operator can check the image currently being photographed in color or black and white together with the color image or the black and white image including the color picking information by operating the switch.

The multiple image signal processor 260 according to the present invention includes a picture in picture (PIP) function.

The first video signal or the second video signal output from the second video signal selecting means 242 is directly output to the display device 272 via the multiple video signal processing means 262 without overlapping the color picking signal. The third image signals R2, G2, and B2 overlapping the color peaking signals R1, G1, and B1 may be allocated to a predetermined area of the display device 272 and output together.

On the contrary, after displaying the third image signal including the color picking signal on the entire display device 272 by using the control unit connected to the multiple image signal processing unit 260, the image output from the second image selecting means 242. The first video signal or the second video signal may be displayed by allocating a partial area of the display device 272.

The second photographed signal selecting means 242 is also displayed on the display device by processing the image being photographed in color or black and white by the operation of a switch connected to the outside.

The multi-image signal processor 260 receives the peaking amount information signals R3, G3, and B3 output from the peaking signal processor 250 and displays the peaking amount information signals R3, G3, and B3 in the form of a histogram or a bar graph on a portion of the display device 272. .

[Second Embodiment]

The image processing apparatus according to the second embodiment of the present invention has an advantage of being portable by providing an input terminal for receiving a signal output from an external photographing apparatus. If necessary, the input terminal provided in the image processing apparatus may be connected to a photographing apparatus including a broadcast camera by a cable.

3 is an image of an original image photographed before image processing according to the present invention.

Referring to FIG. 3, before color picking, a plurality of subjects showing natural colors are shown. However, only the image viewed by the display device does not know which subject the focus is on.

4 is an image of an image processed image according to the present invention.

When the operator selects green and blue as the color picking signal output means 233 as an example, the signal superimposing unit 260 displays the color picking signal expressing green and blue in gray levels on the second video signal which is a black and white video signal. On the device.

As shown, two colors, green (G) and blue (B), are expressed in the image signal processing apparatus as a depth of focus formed on the outline or surface of the subject.

Green indicates that the peaking signal is strong and the focus is well established, and blue indicates that the peaking signal is weak and the subject is out of focus of the camera.

If the peaking signal is strong, it is expressed in bright green, and as the intensity of the peaking signal is weakened, it is expressed in cyan of medium brightness. When the peaking signal becomes weaker, it is expressed in dark blue.

The bag located in the middle of the drawing is made of a fiber material can feel the texture even with the naked eye, the bottom of the case located on the right side of the bag can also check the uneven part with the naked eye. This region contains a signal of high band component in the video signal.

Therefore, as described above, when the digital filter unit is set to the high band filter characteristic by the automatic mode, the high frequency signal is passed through and outputted, and the gain adjusting unit, the color peaking signal output unit, the multiple image signal processing unit, and the image signal display unit are output. Is output via

At this time, not only the outline of the bag but also the surface of the bag or the uneven portion of the case can check the gradation composed of a plurality of colors, so that the surface state of the subject can be known.

Although the present invention has been shown and described with reference to the preferred embodiments as described above, it is not limited to the above embodiments and those skilled in the art without departing from the spirit of the present invention. Various changes and modifications will be possible.

1 is a block diagram of a photographing apparatus according to the related art,

2 is a block diagram of an image signal processing apparatus according to the present invention;

3 and 4 are images before and after image signal processing according to the present invention;

<Explanation of symbols for the main parts of the drawings>

210: video signal input unit 220: video signal processing unit

230: color picking signal generator 240: video signal selector

250: peaking signal processing unit 260: signal overlapping unit

270: video signal display unit

Claims (16)

A video signal input unit for receiving a video signal output while photographing a subject and outputting the video signal as a component video signal; And A color picking signal generator for outputting a color picking signal for expressing a focus state of the subject in gray using a plurality of colors by using a luminance signal among the component video signals; Image signal processing apparatus comprising a. The method of claim 1, A video signal processor for receiving the component video signal and outputting a color video signal and a black and white video signal; First and second video signal selection means for outputting any one of the color video signal and the black and white video signal; And Signal superimposing means for receiving the color peaking signal output from the color peaking signal generator and outputting it as a superimposed signal together with the color video signal or the black and white video signal output from the first video signal selecting means Image signal processing apparatus further comprising. The method of claim 2, wherein the color peaking signal generation unit, A digital filter for receiving a luminance signal of the component video signals and outputting a first peaking signal including information on a luminance displacement amount; Gain adjusting means for receiving the first peaking signal and outputting a second peaking signal in which the gain of the luminance displacement is adjusted; And Color picking signal output means for receiving the second picking signal and outputting a color picking signal including a gradation of a plurality of colors Image signal processing apparatus comprising a. The method of claim 3, A peaking amount accumulating means for receiving the second peaking signal and outputting a third peaking signal in which a peaking degree is accumulated in units of entire frames of a screen; And Peaking amount information signal processing means for receiving the third peaking signal and outputting a peaking amount information signal for displaying the peaking amount as a geometrical displacement Image signal processing apparatus further comprising. The method of claim 4, wherein Multiple video signal processing means for receiving the superimposed signal, the peaking amount information signal and the video signal output from the second video signal selecting means, and outputting multiple video signals; And Image signal display unit for displaying the multiple image signal Image signal processing apparatus further comprising. The method of claim 3, The digital filter has a high band pass characteristic in order to pass only a luminance signal including a high band component. The method of claim 6, And a noise filter for reducing noise included in the first peaking signal passing through the digital filter. The method of claim 3, And the color peaking signal output unit is connected to an input pad to set a range of hue, saturation, and gradation to the second peaking signal. The method of claim 2, And the signal superimposing means is connected to a switch for superposing one of the color peaking signal and the color video signal or the black and white video signal. 10. The method of claim 9, And the first video signal selecting means and the second video signal selecting means are connected to a switch for outputting any one of a color video signal and a black and white video signal. The method of claim 1, The image signal input unit further comprises an input terminal for receiving an image from an external photographing apparatus. Outputting a video signal converted from the captured image of the subject as a component video signal; And Outputting a color peaking signal for expressing a focus state of the subject as a gradation composed of a plurality of colors by using a luminance signal among the component video signals; Image signal processing method comprising a. The method of claim 12, Outputting a black and white video signal and a color video signal using the component video signal; And Superimposing one of the black and white video signals and the color video signal and the color peaking signal and outputting the overlapped signal; Image signal processing method further comprising. The method of claim 13, wherein the outputting of the color picking signal comprises: Outputting the luminance signal as a first peaking signal including information on a luminance displacement amount; Receiving the first peaking signal and outputting a second peaking signal in which a gain of a luminance displacement is adjusted; And Outputting a color peaking signal including a gray value comprising a plurality of colors as the second peaking signal; Image signal processing method comprising a. The method of claim 14, Outputting a peaking amount accumulation signal by accumulating the peaking degree of the entire photographed image by receiving the first peaking signal in units of frames; And Outputting a peaking amount information signal representing a cumulative value as a geometric displacement using the peaking amount accumulation signal; Image signal processing method further comprising. The method of claim 15, Receiving the overlapping signal and the peaking amount information signal and outputting a multiple image signal; Displaying the multiple video signals on a display device; Image signal processing method further comprising.

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