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A pseudo color inhibiting method with recursive protection

A false color and recursive technology, applied in the field of recursively protected false color suppression, can solve the problem of chroma resolution reduction

Active Publication Date: 2005-09-14
HANGZHOU NATCHIP SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For many still images, which do not produce false colors, chrominance averaging on these parts of the image will result in a reduction in chrominance resolution

Method used

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  • A pseudo color inhibiting method with recursive protection
  • A pseudo color inhibiting method with recursive protection
  • A pseudo color inhibiting method with recursive protection

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Embodiment Construction

[0022] figure 1 An implementation block diagram of the false color suppression method involved in this embodiment is provided. 101 is a motion judging module, which performs motion detection on the brightness signal of the image. It judges whether there is motion in the segment image according to the difference between the corresponding pixels of the adjacent field image, and gives the motion sign. Recursive judgment module 102 is a main part of this method, it utilizes candidate pixel chromaticity value, recursive chromaticity value and recursive weight and threshold value TH2, TH3, TH4 to judge whether the color of image is caused by the crosstalk of brightness . The motion flag obtained by the motion judgment module 101 and the recursive judgment result calculated by the recursive judgment module 102 are used as the basis for whether the inter-frame chromaticity averaging module 104 performs inter-frame averaging on the chromaticity to remove false colors. 103 in the fig...

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Abstract

This invention relates to a false color suppressing method with recursive protection including: a, carrying out motion judgment by picture brightness signal difference of corresponding positions of adjacent fields to divide picture pixel into two kinds: moving and static, b, judging the recursion to the static pixels in step a, said judgment utilizes the chromatic information of the continuous N field corresponding position and the false color judged result got before to decide if there is false color in the chromaticity of the pixel, c, making interfame balance to the chromatic values of the pixels which was judged to be static and exactly the false color in step b.

Description

technical field [0001] The invention is applied to digital television signal processing, and particularly relates to a recursive protection false color suppression method. Background technique [0002] In composite TV signal system, luminance signal and chrominance signal occupy the signal bandwidth together. Taking the PAL system signal as an example, the chrominance signals U and V are firstly modulated on the 4.43MHz color subcarrier in an orthogonal manner, and then superimposed on the luminance signal. As a result of the superposition, the chrominance signal and the luminance high-frequency signal overlap with each other in the frequency domain. When color decoding performs bright color separation, if the common bright color separation method is used, some luma signals will be decoded into chroma, and some chroma signals will also be decoded into luma. Luminance interference with chromaticity is customarily called "false color". [0003] Fa...

Claims

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Application Information

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IPC IPC(8): H04N9/77
Inventor 陈涛遇岩叶丰张明
Owner HANGZHOU NATCHIP SCI & TECH