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Space-time domain joint noise estimation system

A noise estimation, space-time domain technology, applied to TV system parts, TV, color TV parts, etc., can solve the problem of insufficient noise estimation accuracy, and achieve accurate noise level estimation and scene noise level , the effect of denoising improvement

Active Publication Date: 2015-06-17
北京集朗半导体科技有限公司
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Problems solved by technology

[0003] Aiming at the problem of insufficient accuracy of existing noise estimation, the present invention proposes a space-time domain joint noise estimation system, which improves the accuracy of static and moving scene noise level estimation

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Embodiment Construction

[0012] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0013] Such as figure 1 As shown, a space-time domain joint noise estimation system in this embodiment includes a motion estimation module, a scaling motion detection module, a global motion detection module, a scene switching detection module, a temporal noise estimation module, a spatial noise estimation module, and a fusion module ;

[0014] The motion estimation module calculates and outputs the motion vector based on the previous frame and the current frame; the scaling motion detection module calculates and outputs the scaling credibility based on the motion vector; the global motion detection module calculates and outputs the global credibility based on the motion vector; Calculate the output scene switching credi...

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Abstract

The invention relates to a space-time domain joint noise estimation system. The system comprises a motion estimation module, a scale motion detection module, a global motion detection module, a scene change detection module, a time domain noise estimation module, a space domain noise estimation module and a fusion module, wherein the motion estimation module calculates and outputs a motion vector according a previous frame and a current frame; the scale motion detection module calculates and outputs scale reliability according to a motion vector; the global motion detection module calculates and outputs global reliability according to the motion vector; the scene change detection module calculates and outputs scene change reliability according to the motion vector; the time domain noise estimation module calculates and outputs a time domain noise level according to the previous frame and the current frame; the space domain noise estimation module calculates and outputs a space domain noise level according to the current frame; the fusion module calculates and outputs a final noise level according to the scale reliability, the global reliability, the scene change reliability, the space domain noise level and the time domain noise level. The system provided by the invention can be used for improving the accuracy of an output noise level.

Description

technical field [0001] The present invention relates to the technical field of video image processing, in particular to video image noise estimation technology, and specifically refers to a space-time domain joint noise estimation system. Background technique [0002] Video image noise estimation is the premise of video noise reduction. Existing noise estimation is mainly divided into three categories: spatial noise estimation, time domain noise estimation, and simple space-time domain joint noise estimation; all three types of noise estimation have deficiencies, resulting in the accuracy of noise estimation not meeting the requirements. The disadvantage of estimation is that it cannot distinguish between real noise and high-frequency information of the original image; the disadvantage of temporal noise estimation is that it cannot distinguish between real noise and motion information of the original image; simple space-time domain joint noise estimation does not target spec...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/21H04N5/14
Inventor 韩睿罗杨汤仁君郭若杉颜奉丽汤晓莉
Owner 北京集朗半导体科技有限公司
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