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Edge-preserving-based weighted anisostropic diffusion filtering method

An anisotropic and diffusion filtering technology, applied in image data processing, instrumentation, computing, etc., can solve the problems of noise enhancement, inability to effectively filter out noise, and inability to effectively distinguish diffused pixels as noise or edge information, etc., to achieve Avoid the effects of noise amplification and loss of edge information

Inactive Publication Date: 2015-06-10
TIANJIN UNIV
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Problems solved by technology

However, for the noise with high intensity, the algorithm cannot effectively distinguish whether the diffuse pixels are noise or edge information. Therefore, using this method not only cannot effectively filter the noise, but may also enhance the noise

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  • Edge-preserving-based weighted anisostropic diffusion filtering method
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Embodiment Construction

[0029] Weighted anisotropic diffusion filtering is to perform noise detection through a certain method, and implement different degrees of diffusion according to whether the diffused pixels are noise or edges, so as to more accurately control the filtering process and improve the filtering effect.

[0030] The present invention aims to propose a filtering method that can effectively distinguish image edges and noises. In the process of implementing image filtering, a method is first used to perform noise and edge detection, and then according to whether the diffused pixels belong to edge regions, flat regions, or The noise area is assigned with different weight values, so that it can effectively remove the noise while ensuring that the edge detail information of the image is not lost.

[0031] The main technical problem to be solved by the present invention is how to effectively distinguish the diffused pixels from the flat area, the edge area or the noise area, so as to improve the...

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Abstract

The invention relates to the field of image processing and display and aims at providing a filtering method capable of effectively distinguishing image edges and noise. Therefore, according to the technical scheme, an edge-preserving-based weighted anisostropic diffusion filtering method comprises performing noise and edge detection; according to whether diffused pixels belong to an edge region, a flat region or a noise region, distributing different weighted values for the pixels. Therefore, the noise can be effectively eliminated, and meanwhile, losses of edge detail information of an image can be avoided. The edge-preserving-based weighted anisostropic diffusion filtering method is mainly applied to image processing and display.

Description

Technical field [0001] The invention relates to the field of image processing and display, in particular to a switch-weighted anisotropic diffusion filter based on image edge detection, which can effectively protect image details while filtering out Gaussian noise in the image. . technical background [0002] Digital image data is often disturbed by noise during transmission and storage. Therefore, digital image filtering technology is an important content in the field of digital image processing. There are many types of noise that interfere with images, mainly Gaussian noise, impulse noise and Rayleigh noise, among which the more common ones are Gaussian noise and impulse noise. Gaussian noise is mainly generated by electronic circuits or generated by image sensors under low illumination and low temperature. The degree of image interference by this type of noise will not only vary with the gray level, but also In the same gray level, it is not all consistent, and it is difficu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 史再峰贾圆圆庞科徐江涛赵升周佳慧
Owner TIANJIN UNIV
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