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Method based on still image scene judgment to avoid noise amplification

A technology of judgment avoidance and noise amplification, which is applied in the field of judgment avoidance of noise amplification based on still image scenes, which can solve the problems of input signal amplification and drive technology inadaptability, and achieve the effect of improving image quality

Inactive Publication Date: 2016-02-03
西安宏祐图像科技有限公司
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AI Technical Summary

Problems solved by technology

[0007] The present invention proposes a method based on static image scene judgment to avoid noise amplification, aiming to solve the problem that the existing overdrive technology cannot adapt to the change of input signal and amplify the noise when the image scene is static

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  • Method based on still image scene judgment to avoid noise amplification

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] like figure 1 As shown, a method for judging and avoiding noise amplification based on a still image scene, is characterized in that, comprising the following steps:

[0029] 101. Calculate the global change GlobalMotion between the previous frame image and the current frame image:

[0030] GlobalMotion=(Σi=N|Rcur(i)-Rpre(i)|+|Gcur(i)-Gpre(i)|+|Bcur(i)-Bpre(i)|) / (3*N)=200

[0031] Among them, N refers to the number of image pixels in each frame, Rcur(i), Gcur(i), Bcur(i) represent the grayscale value of the R, G, and B components of the i-th pixel in the current frame, and Rpre (i), Gpre(i), Bpre(i) represent the grayscale value size of the R, G, and B components of the i-th pixel in the previous frame;

[0032] 102. Carry out coring and denoising processing on global changes to reduce the impact of noise; coring denoising threshold...

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Abstract

The invention discloses a method based on still image scene judgment to avoid noise amplification. The method is characterized by including the following steps: 101, calculating Global Motion between a previous image frame and a current image frame, wherein Global Motion=(Sigmai=N / Rcur(i)-Rpre(i) / + / Gcur(i)-Gpre(i) / + / Bcur(i)-Bpre(i) / ) / (3xN), N refers to number of pixel points of each image frame, Rcur(i), Gcur(i) and Bcur(i) refer to gray-scale values of R, G and B components of an ith pixel point in the current frame, and Rpre(i), Gpre(i) and Bpre(i) refer to gray-scale values of R, G and B components of an ith pixel point in the previous frame. By the method, the problem that noise is amplified caused by the fact that existing overdrive technology cannot adapt to changing of input signals when image scenes are still is solved, and image display quality can be improved.

Description

technical field [0001] The invention relates to the technical field of displays, in particular to a method for judging and avoiding noise amplification based on still image scenes. Background technique [0002] Dominance of flat panel display technology. However, limited by the principle of liquid crystal display technology, the gray scale value of the current frame is different from the gray scale value of the current frame. The voltage applied to both ends of the liquid crystal changes, and the rotation of the liquid crystal molecules requires a response time. If the response time of the liquid crystal is greater than the interval between two frames , there will be image retention, and the audience will feel that the picture is blurred and unclear when watching the fast-moving video picture. Overdrive technology (OD, overdrive) changes the voltage applied to both ends of the liquid crystal to shorten the response time required for the display result of the liquid crystal ...

Claims

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Application Information

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IPC IPC(8): G09G3/36
Inventor 姜建德
Owner 西安宏祐图像科技有限公司