JPS63110891A - Partial mosaic image forming method - Google Patents

Abstract

PURPOSE:To process a picture with movement in real time even if a system is small in scale by designating with a color a part which requires mosaicking. CONSTITUTION:An RGB decoder 2 separates an input image signal into RGB signals, and A/D converters 3R, 3G, and 3B convert them into the signals showing gradations of (n) bits. A fetching color decision circuit 4 compares whether the signals are to be mosaicked or not. Reference data for comparison is previously set in the circuit 4 from a CPU. Data which is allowed in the circuit 4 is inputted to a mosaicking circuit 5 and is fetched to a 1H line memory. The value of the line memory is set to '0' except for the above data. RGB data of (n) bit in which only designated colors are fetched are fetched into a RAM6 for image on which mosaic data in an l stage is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method of partially performing mosaic processing on one image signal.

<Summary of the Invention> The present invention is a method for partially mosaicing an image signal, by specifying the part that requires mosaicing by color, thereby creating a personalized image for moving images. Even a small-scale system using a computer or the like can perform real-time processing.

<Prior Art> In the conventional partial mosaic image creation method of this type, a large computer is used, a region that requires mosaicing is specified, and image processing is performed using software.

<Problem to be solved by the invention> 75. L. In the conventional method described above, the area is first specified, so if the part that requires mosaicing is moved, the area must be specified again each time. Furthermore, since the processing is performed by software, it cannot be processed in real time by a small computer such as a personal computer.

Means for Solving the Problems> In the uninvented method, the portions that need to be mosaiced are designated by color, and most of the processing is performed by hardware.

For Kusaku Therefore, it is effective for images with movement.

However, even a small-scale system using a personal computer or the like can perform real-time processing.

<Example> Hereinafter, one embodiment of the invention will be described with reference to the drawings.

In the drawing, 1 is an input terminal for a composite image signal;
2 is an RGB decoder that converts the composite image signal fjcRGB signal; 3R, 3G, and 3B are analog-to-digital converters; and 4 is an input color determination circuit.

5 is a mosaic circuit, 6 is an image memo! J, 7R, '7G
, 7B is a digital/analog converter, 8 is a display signal switching circuit, 9 is a synchronization separation circuit for extracting a synchronization signal from the original composite image signal 73), and lo is a readout of an image signal from the image memory 6 based on the synchronization signal. This is a display timing controller that controls timing.

Image signal kRGB decoder 2 input from input terminal l
The RGB signals are separated into KGB signals by A/D converters 3R, 3G, and 3B, respectively, and then converted into digital signals representing n-bit gradations.

These converted RGB digital signals each having n bits are used to compare the input signal 731, which is a signal to be mosaiced, by the color determination circuit 4.

This reference data to be compared is generated by a CPU (not shown).
It is set in the captured color determination circuit 4 in advance. The data to be set is n-nobits for each of RGB, and the lower! Allow for a wide range of bit colors. The data accepted by the captured color determination circuit 4 is input to the mosaic circuit 5, and this circuit captures the data into the IH line memory, so that the value of the line memory becomes O when the data is not the same. to write data to the IH line memory.

At this time, the horizontal write data is changed to %m (+++ is a natural number) of the original write clock.

In other words, the timing of changing the write data is %1%2 of the clock when reading. ..., By setting it to 3 Am, the horizontal data becomes 2.22, 4. ...21 pieces of the same data will be read.

This allows data to be mosaiced in the horizontal direction.

Also, vertical mosaicing changes the timing of rewriting the entire data of this IH line memory, H/2.
．．・・）! By always setting the reading timing to the start of reading for each IH, vertical mosaicing can be performed.

In this way, the 7hRGBn bit data is mosaiced by the mosaic circuit 5 having all the IH line memories, and only the color specified by the input color determination circuit 4 at its input stage is imported. It is taken into M memory 6.

The one-stage mosaic data created in this way is created on the image memory 6. /and,
D/A converters 7R and 7G read out the poor mosaic data stored in the image memory 6 in synchronization with the original image signal.
, 7B to the display signal switching circuit 8.

This display signal switching circuit 8 gives priority to all mosaic data for the part of the 1-original image signal that overlaps with the mosaic data, and outputs the mosaic data, and when this output image signal is displayed on a monitor TV, the specified part of the 1-original image is output. An image in which only the colored parts are mosaiced is obtained.

<Effects of the Invention> In the uninvented system, the area to be mosaiced is specified in one color instead of the area as in the past, so when mosaicing a person's face, etc.

This is very effective because the mosaic of the face is created by following the movement of the person.

Also, most of the image processing can be done with hardware, such as a personal computer? It can be easily realized using a small and inexpensive system.

[Brief explanation of the drawing]

The drawing is a block diagram of an image processing device that implements a partial mosaic image creation method that has not yet been invented. l: input terminal, 2: RGB decoder, 3R. 3G, 3B: Analog-to-digital converter, 4: Captured color judgment circuit, 5: Mosaic circuit, 6: Image memory, 7R,
7G, 7B: Digital-to-analog converter, 8: Display signal switching circuit.

Claims (1)

[Claims] 1. Decomposing the image signal into RGB signals, converting each of the RGB signals from analog to digital, and determining whether the digital image signal is a specified mosaic color;
The feature is that only the color signals to be mosaiced are input to the mosaic circuit, this mosaiced image signal is stored in an image memory, and this stored image is superimposed on the original image signal. How to create a partial mosaic image.