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Weighted Anisotropic Diffusion Filtering Method Based on Edge Preservation

An anisotropic and diffusion filtering technology, applied in image data processing, instrumentation, computing, etc., can solve the problems of inability to effectively filter out noise, enhance noise, and inability to effectively distinguish whether the diffusion pixels are noise or edge information, etc. Avoid the loss of edge information and the effect of noise amplification

Inactive Publication Date: 2017-08-04
TIANJIN UNIV
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  • Application Information

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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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  • Weighted Anisotropic Diffusion Filtering Method Based on Edge Preservation
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  • Weighted Anisotropic Diffusion Filtering Method Based on Edge Preservation

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Embodiment Construction

[0030] Weighted anisotropic diffusion filtering is to detect noise through a certain method, and implement different degrees of diffusion according to whether the diffusion pixels belong to noise or edge, so as to control the filtering process more accurately and improve the filtering effect.

[0031] The purpose of the present invention is to propose a filtering method that can effectively distinguish image edges and noises. In the process of image filtering, a method is first used to detect noises and edges, and then according to whether the diffused pixels belong to edge areas, flat areas, or Different weight values ​​are assigned to the noise area, so that it can effectively remove the noise while ensuring that the edge detail information of the image is not lost.

[0032] The technical problem mainly solved by the present invention is how to effectively distinguish the diffusion pixels belonging to the flat area, the edge area or the noise area, so that the denoising abili...

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Abstract

The present invention relates to the field of image processing and display. In order to provide a filtering method capable of effectively distinguishing image edges and noises, the technical solution adopted by the present invention is, based on an edge-protected weighted anisotropic diffusion filtering method, noise And edge detection, and then assign different weight values ​​to the diffused pixels according to whether they belong to the edge area, flat area, or noise area, so that it can effectively remove noise while ensuring that the edge details of the image are not lost. The invention 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 Gaussian noise in the image. . [0002] technical background [0003] Digital image data is often disturbed by noise in the process of transmission and storage, so 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 including Gaussian noise, impulse noise, and Rayleigh noise, among which Gaussian noise and impulse noise are more common. Gaussian noise is mainly generated by electronic circuits or by image sensors under low illumination and high temperature conditions. The degree of image interference by such noise will not only vary with gray levels, but also It is also not consistent on the same gray level, and it is di...

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Application Information

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Patent Type & Authority Patents(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