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Method and device for color noise suppression

A noise suppression and color technology, applied in the parts of color TV, color TV, TV system parts, etc.

Active Publication Date: 2012-11-14
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a method and device for suppressing color noise, which adjusts its color saturation according to the brightness (Y) signal of each image pixel, so as to give it a lower brightness when the brightness is lower. Suppress the color noise of low brightness with high color saturation, and give it a higher color saturation when the brightness is high, so that the picture has richer colors

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  • Method and device for color noise suppression
  • Method and device for color noise suppression
  • Method and device for color noise suppression

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Embodiment Construction

[0033] In order to have a further understanding and understanding of the features, purposes and functions of the present invention, the detailed description is as follows in conjunction with the accompanying drawings:

[0034] Because the present invention is mainly based on the brightness performance of the pixels on the digital image, the chroma corresponding to the pixels is adjusted by weighting, and the color noise of low brightness is suppressed by giving it a lower color saturation when the brightness is lower. For the weighting method, please refer to figure 1 , figure 1 It is a flow chart of weighting in the method for suppressing color noise in a preferred embodiment of the present invention. Firstly, a weighting function is provided, the weighting function is related to a critical brightness, and the brightness of the pixel is used as a variable, this is step 101 . Wherein, the weighting function may be a linear straight line equation.

[0035] Next, the critical...

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Abstract

The invention relates to a method and device for color noise suppression, and the method comprises the following steps: acquiring the brightness value of a pixel; and adjusting the chromaticity of the pixel according to the brightness value of the pixel, wherein when the brightness value is lower, the pixel needs to be adjusted to have lower color saturation, and when the brightness value is higher, the pixel needs to be adjusted to have higher color saturation. In the method, the color saturation is adjusted through the brightness situation of each digital image pixel, thereby effectively reducing the strength of the chromaticity of the pixels with the lower brightness, and further improving the situation that the higher color saturation or color noise of a digital image can generate adverse effects on the image quality when the brightness of the pixels is lower.

Description

[0001] This application is a divisional application against the parent application (application number: 200410080507.9, filing date: September 30, 2004, title of invention: a method and device for suppressing color noise). technical field [0002] The invention relates to a method and device for suppressing color noise under low brightness, in particular to a method and device for suppressing color noise by weighting and adjusting pixel chroma according to pixel brightness. Background technique [0003] With the advent of the digital age, digital cameras have gradually replaced the use of traditional cameras, and the circulation of image information has gradually replaced traditional photos with digital images. Therefore, the good and bad of digital image quality are increasingly required. [0004] At present, the unit of a digital image is a pixel, and the color of each pixel is composed of three primary colors (R, G, B), and each pixel color has its brightness and chroma. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/21H04N9/77
Inventor 李维国陈衣凡
Owner MEDIATEK INC