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Image denoising method and apparatus

An image and pixel technology, applied in image enhancement, image data processing, instruments, etc.

Inactive Publication Date: 2018-06-05
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the above technical problems, the embodiments of the present invention expect to provide an image denoising method and device, which can preserve the edge details of the image while removing the noise, and can also remove the directional noise caused by directional interpolation and amplification, so that the video Image edges are smoother

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  • Image denoising method and apparatus

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Embodiment 1

[0060] see figure 1 , which shows an image denoising method provided by an embodiment of the present invention, the method can be applied to devices and devices that need to denoise images, and the method can include:

[0061] S101: traverse the pixels of the image to be processed according to the preset direction template set, and obtain the current direction corresponding to each pixel and the credibility of the current direction;

[0062] S102: Perform DWF filtering according to the current direction corresponding to each pixel and the preset direction-based weighted filtering DWF template, and obtain a DWF filtering result corresponding to each pixel;

[0063] S103: Filter the pixels of the image to be processed according to a preset bilateral filtering BF template to obtain a BF filtering result corresponding to each pixel;

[0064] S104: Mixing and outputting the DWF filtering result and the BF filtering result of each pixel according to the respective reliability of th...

Embodiment 2

[0112] Based on the same technical idea of ​​the foregoing embodiments, see Figure 9 , which shows an image denoising device 90 provided by an embodiment of the present invention, which may include: a direction and direction reliability detection TDCD module 901, a direction-based weight filtering DWF module 902, a bilateral filtering BF module 903 and a hybrid Mixing module 904; wherein,

[0113] The TDCD module 901 is configured to traverse the pixels of the image to be processed according to a preset direction template set, and obtain the current direction Dir corresponding to each pixel and the reliability Alpha of the current direction;

[0114] The DWF module 902 is configured to perform DWF filtering according to the current direction corresponding to each pixel and the preset direction-based weighted filtering DWF template, to obtain a DWF filtering result corresponding to each pixel;

[0115] The BF module 903 is configured to filter the pixels of the image to be pr...

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Abstract

Embodiments of the invention disclose an image denoising method and apparatus. The method can comprise the steps of traversing pixel points of a to-be-processed image according to a preset direction template set, thereby obtaining current directions corresponding to the pixel points and the credibility of the current directions; according to the current directions corresponding to the pixel pointsand a preset DWF (direction-based weight filtering) template, performing DWF to obtain DWF results corresponding to the pixel points; filtering the pixel points of the to-be-processed image accordingto a preset BF (bilateral filtering) template, thereby obtaining BF results corresponding to the pixel points; and according to the DWF results and the BF results of the pixel points, performing mixed output based on the credibility of the current directions of the pixel points, thereby obtaining a denoised image.

Description

technical field [0001] The present invention relates to image processing technology, in particular to an image denoising method and device. Background technique [0002] In the process of video image acquisition and transmission, various noises are often introduced, the most common of which is Gaussian noise. The existence of Gaussian noise makes the video image flicker and affects the visual experience of the viewer. To solve this problem, it is necessary to denoise the noise introduced during the acquisition or transmission process, so that the final denoised video will be cleaner when viewed, thereby improving the viewer's visual experience and video quality. [0003] In the field of video image processing, image scaling is a commonly used key technology. In recent years, the direction-based video image magnification algorithm has become the main technology in the field of scaling. However, the direction-based interpolation magnification algorithm often fails Impulse noi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T5/70G06T5/20G06T2207/20028
Inventor 滕涛
Owner SANECHIPS TECH CO LTD
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