Method for processing denoising image and apparatus thereof

An image processing and image technology, applied in image communication, color TV parts, TV system parts, etc., can solve the problems of high complexity of motion estimation algorithm, large amount of calculation, difficult real-time image processing, etc., to achieve The effect of low computational complexity

Inactive Publication Date: 2009-01-28
SONIX TECH
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Problems solved by technology

However, the complexity of the motion estimation algorithm is high and the amount of calculation is large, and it is difficult to process the current image in real time when implemented by hardware

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  • Method for processing denoising image and apparatus thereof
  • Method for processing denoising image and apparatus thereof
  • Method for processing denoising image and apparatus thereof

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Embodiment Construction

[0040] The image capture process or transmission process will inevitably generate noise interference and affect the presentation of the image. Therefore, image processing is usually used to eliminate noise, and one of them is temporal filtering. The time-domain filtering process refers to the information of the previous image to filter the current image to eliminate noise. However, in the process of denoising the moving objects in the image, it is easy to produce moving afterimages, which make the human eyes feel uncomfortable.

[0041] Since human eyes habitually track moving objects in the image and pay attention to the moving state of the moving object, it is difficult to perceive the noise of the moving object in the image. Therefore, based on the characteristics of the human visual system, the embodiment of the present invention uses motion detection processing to determine whether each image block in the image is in a static state, and performs time-domain filtering proc...

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Abstract

The invention provides a denoising method and a device for processing an image. In the method for processing the image, firstly, a current image is received, wherein the current image has a plurality of image blocks; and then a first block of the image blocks in the current image is subtracted by at least one first block in the prior image so as to obtain a difference value block. The difference value block is subjected to movable detection so that whether the first block in the current image is in the static state is judged. When the first block in the current image is in the static current, the time domain filtering process is performed to remove the noise. The analysis of the static state reduces the existence of a movable ghost.

Description

technical field [0001] The present invention relates to an image processing method and its device, and in particular to an image processing method and device for eliminating noise. Background technique [0002] With the development of multimedia technology, people have higher and higher requirements for high-quality images. However, one of the important factors affecting image quality is the accompanying noise during image capture, signal conversion, and signal transmission. Therefore, image processing technology must be used to eliminate noise that affects human visual perception. The most common denoising image processing includes spatial domain denoising processing and time domain denoising processing. [0003] Spatial domain denoising processing uses a filter with a local window block to perform spatial domain filtering on each pixel in the current image, making the image smoother and softer, thereby reducing the visual perception of noise by the human eye . However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/21H04N5/14
Inventor 李季峰陈世泽
Owner SONIX TECH
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