Color image denoising method and system thereof

A color image and denoising technology, applied in the field of video processing, can solve the problems of blurred edges, residual color noise, unsatisfactory denoising results, etc., and achieve a good denoising effect.

Active Publication Date: 2011-08-17
HANGZHOU HIKVISION DIGITAL TECH
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Problems solved by technology

[0004] However, the denoising results of traditional color image denoising methods are often unsatisfactory, and there are shortcomings such as residual color noise, false color edges or textures, edge blurring, etc.
The inventors of the present invention believe that the reason is that color images are generally composed of complementary metal-oxide semiconductor (Comple

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  • Color image denoising method and system thereof
  • Color image denoising method and system thereof

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Embodiment Construction

[0027] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0029] The first embodiment of the present invention relates to a method for denoising a color image. figure 1 is a schematic flowchart of the method for denoising a color image. The method includes the following steps:

[0030] In step 101, the color image is decomposed into a luma channel image and N chrominance channel images, N≥2.

[0031] ...

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Abstract

The invention relates to the field of video processing, and discloses a color image denoising method and a system thereof. In the method and the system thereof, cross-channel invariable information is extracted from a luminance channel image for the denoising treatment on a chrominance channel image, so that a false color edge or texture can be eliminated, the fuzzyness of the edge part can be reduced, and better integral denoising effect can be obtained. The cross-channel invariable information can be edge information, texture information, noise intensity and the like. The luminance channel may be firstly processed with local data conversion; the cross-channel invariable information is extracted from a conversion domain; and characteristic information, such as edge texture and the like can be extracted from local image data more effectively based on different characteristics of a signal represented in the conversion domain, and consequently, the chrominance channel image can be denoised better based on the information.

Description

technical field [0001] The invention relates to the field of video processing, in particular to color image denoising technology. Background technique [0002] Video image denoising (noise reduction) is an important content in the field of video processing. Since the image will inevitably be affected by the interference of the transmission medium, external and environmental optical signals, electrical signals, and mechanical damage during the recording, data compression, storage, and transmission processes, when the video image reaches the display terminal, the video The image content carried by the signal (brightness value and color value of each pixel) changes, and these changes are called image noise because of their spatial and temporal randomness. [0003] Traditional color image denoising methods generally consider that a color image is composed of three independent grayscale images. Therefore, traditional color image denoising methods generally use the same denoisin...

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T5/002G06T2207/10024G06T5/10G06T2207/10016
Inventor 邓志辉张荣祥查林
Owner HANGZHOU HIKVISION DIGITAL TECH
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