A method and device for adaptively denoising video images

A video image and adaptive technology, applied in the field of video image processing and video communication, can solve the problems of poor denoising effect and large amount of calculation, and achieve the effect of avoiding smear and ensuring edge details.

Inactive Publication Date: 2011-12-14
ZTE CORP
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The present invention provides a method and device for self-adaptive denoising of video images to solve the defects in the prior art that the denoising algorithm has a large amount of calculation and the denoising effect is not good

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  • A method and device for adaptively denoising video images
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  • A method and device for adaptively denoising video images

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Embodiment Construction

[0065] The basic concept of the present invention is: read in a frame of video image from buffer zone, calculate respectively the motion vector and the difference between each pixel point in the frame image and the pixel point at the same position as the pixel point in the adjacent frame. Edge detection is performed on each pixel in the frame image; the calculation result of the motion vector of each pixel and the edge detection result are used to select the corresponding intensity filtering method for each pixel, and then the Gaussian similarity filter is used to filter each pixel Filter accordingly.

[0066] like figure 1 Shown, the present invention mainly comprises the following steps:

[0067] S1, read a frame of video image from the buffer;

[0068] S2. Select an unfiltered pixel from the image frame,

[0069] S3. Calculate the motion vector between the pixel point and the pixel point in the same position as the pixel point in the adjacent frame, and perform edge dete...

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Abstract

The invention discloses a method and device for performing adaptive denoising on a video image. The device comprises a video image reading module, an edge detection module, a filtering mode selection module and a filtering module; the method comprises the following steps of: reading in a frame of video image from a buffer zone, respectively calculating motion vectors between each pixel in the frame of image and the pixel at the same location in a neighboring frame, and respectively executing the edge detection on each pixel in the frame of image; respectively selecting the filtering mode having corresponding intensity for each pixel according to the edge detection result and the calculation result of the motion vector and of each pixel, and then, correspondingly filtering each pixel by a Gaussian similarity filter. The method and the device have obvious denoising effect on various noises of different scene sequences, and can effectively remove noises by combination of a time domain and a space domain.

Description

technical field [0001] The invention relates to video image processing and video communication technology, in particular to a method and device for adaptively denoising video images. Background technique [0002] The acquisition, compression coding, transmission, decoding, and display of video images are the main functions of video application systems, and various noises will inevitably be introduced in these processes. Noisy video images will not only directly affect the subjective quality of images, but also affect various subsequent processing tasks of video images, such as: storage, codec, transmission, target recognition and tracking, etc. [0003] The video sequence should not only pay attention to the visual effect of each frame of image, but also pay attention to the visual experience of the whole sequence. Due to the inherent reasons of electronic products, noise is inevitable, and noise will affect the visual effect. Therefore, in order to improve people's visual ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/21H04N5/14
Inventor 李凤山沈琳张伟
Owner ZTE CORP
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