A noise reduction method and system based on random replacement

A random replacement and noise reduction technology, which is applied in image data processing, instruments, calculations, etc., can solve the problems of blurring of smoothing filter, insufficient processing ability of rendering noise of smoothing filter, etc., and achieve a simple effect

Active Publication Date: 2016-08-24
ARKMICRO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the smoothing filter is blurred enough, the speckle or color block can still be seen in the final denoised image. Therefore, the processing ability of the smoothing filter for rendering noise is insufficient

Method used

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  • A noise reduction method and system based on random replacement
  • A noise reduction method and system based on random replacement
  • A noise reduction method and system based on random replacement

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Embodiment Construction

[0047] Embodiments of the present invention provide a noise reduction method and system. The noise reduction method and system described in specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0048] Such as figure 2 Shown is a flow chart of a noise reduction method based on random replacement in a specific embodiment of the present invention, the method includes the following steps:

[0049]Step S0: initialization parameter setting; in the noise reduction method described in the specific embodiment of the present invention, the initialization parameter setting includes setting the length of the replacement template, generating a random replacement template, the size of the replacement boundary, and initializing the current replacement point identification index=0, Indicates that the replacement starts from the 0th coordinate of the template. Wherein, the length of the template can be set as any natura...

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Abstract

An embodiment of the invention discloses a noise reducing method and a noise reducing system based on random replacement. The noise reducing method includes steps of setting initialized parameters; performing edge detection to input images, judging whether current pixels are in flat areas or not according to detection results; if so, then calculating substitution point identity values; reading substitution point coordinates of current points from a substitution template according to the substitution point identity values, and then substituting the substitution points for the current points. The invention further discloses a noise reducing system based on random replacement. The noise reducing system comprises an initialized parameter setting unit, an edge detection unit, a substitution point identity calculating unit, a substitution point coordinate reading unit and a substitution unit. By the noise reducing method and the noise reducing system based on random substitution, noise signals in images are 'scattered' to the surrounding areas, and render noises and most Gaussian noises are reduced effectively.

Description

technical field [0001] The invention relates to the field of image processing, in particular to the field of digital image noise reduction processing. Background technique [0002] Image noise reduction is a very important link in high-quality image processing systems. Video images may introduce noise during compression, transmission, and decompression. The noise may be impulse noise, Gaussian noise, or some non-uniform color blocks and color spots contained in the image itself (hereinafter referred to as rendering noise for the time being). ). Noise is generally not easy to be noticed in moving images or image boundaries, but when the image is still or the noise falls on a large flat area, it is easy to be noticed by the naked eye because the noise is different from the background, thus causing the visual effect of the image to deteriorate. [0003] Traditional noise reduction methods include weighted average, Gaussian smoothing, etc. These methods can properly reduce noi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 李琛袁扬智韦毅石岭
Owner ARKMICRO TECH
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