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Method for eliminating noise of compressed video

A technology of video noise and spectrum, applied in the field of electronic information, can solve the problem of high time complexity of image noise reduction algorithm, and achieve the effect of enriching image information, reducing time complexity and improving image quality

Active Publication Date: 2016-12-14
PEKING UNIV
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to propose a method for eliminating noise in compressed video, aiming to solve the problem of high time complexity of some image noise reduction algorithms

Method used

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  • Method for eliminating noise of compressed video
  • Method for eliminating noise of compressed video
  • Method for eliminating noise of compressed video

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Embodiment Construction

[0022] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] Such as figure 1 As shown, embodiments of the present invention provide a method for eliminating noise in compressed video, which includes:

[0024] S11, the step of dividing the pixel block, dividing each frame of the noisy image into a plurality of pixel blocks, wherein each pixel block includes a plurality of pixel points;

[0025] S12, the pixel block matching step, in the current frame and several frames before and after, in the preset area centered on the reference block, respectively screen out pixel blocks that match the reference block, so as to form corresponding three-dimensional pixels for the reference block array;

[0026] S13, the image denoising step, performing denoising on each frame of noisy image by performing three-dimensional discrete cosine transform and first filtering on the three-dim...

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Abstract

The invention discloses a method for eliminating noise of a compressed video, relates to the technical field of image processing, and can solve a problem that some image noise reduction algorithms are high in time complexity. The method comprises a step of pixel block dividing: enabling each image frame comprising noise to be divided into a plurality of pixel blocks, wherein each pixel block comprises a plurality of pixels; a step of pixel block matching: screening out the pixel blocks matched with a reference plate in a preset region where a current frame and a plurality of former and latter frames take the reference as the center, so as to form a corresponding three-dimensional pixel array for the reference block; and a step of image noise reduction: carrying out the discrete cosine transform and first filtering of the three-dimensional pixel array, and reducing the noise of each image frame comprising noise.

Description

technical field [0001] The invention relates to the technical field of electronic information, in particular to a method for eliminating noise in compressed video. Background technique [0002] The image will be polluted by noise in the process of acquisition and transmission, resulting in the degradation of image quality and seriously affecting the subsequent image processing work. Therefore, the image can be denoised. However, although some noise reduction algorithms have high signal-to-noise ratio and visual effects, their time complexity is relatively high. Contents of the invention [0003] The main purpose of the present invention is to propose a method for eliminating noise in compressed video, aiming at solving the problem of high time complexity of some image noise reduction algorithms. [0004] To achieve the above object, a method for eliminating noise in compressed video provided by the present invention includes: [0005] The pixel block division step is to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T5/70
Inventor 杨长水陈瑞贾惠柱解晓东高文
Owner PEKING UNIV