Switching detection method of video scene

Abstract

A method for detecting change ¿C over of video scene includes setting number of current frame in current scene to be k if current frame is first frame of video series or the first frame of new scene as K = 1, calculating mean values of three components ( TC ) for current frame brightness and chrominance ( BAC ) and initializing mean values of TC for multiple image BAC to make i = i+ 1, fetching image data to calculate absolute value of mean value D ¿C value for TC of current frame BAC to last frame BAC, using two conditions of D is less than SUB is greater than Y is less than / SUB is greater than / mean y = D is less than SUB is greater than U is less than / SUB is greater than / mean U + D is less than SUB is greater than V is less than / SUB is greater than / mean Vis greater than or equal toM and D is less than SUB is greater than Y is less than / SUB is greater than + D is less than SUB is greater than U is less than / SUB is greater than + D is less than SUB is greater than Vis less than / SUB is greater than or equal toN to judge whether scene is changed ¿C over or not, changing parameter for cyclic detection.

Description

technical field The invention relates to a detection method for video scene switching, and belongs to the technical field of video compression processing. Background technique In the case of frequent scene switching in a video sequence, the coding quality will be degraded and a large amount of algorithm complexity will be increased. When the scene switching frame is an I frame, because all the macroblocks in the I frame apply the intra-frame coding mode, the scene switching will not have an adverse effect on its coding quality; if it is a B frame, because the B frame adopts a bidirectional prediction mode, even if There is a scene switching, as long as one of the two reference frames is the same scene as the current B frame, it will not have a big impact on the encoding of the current B frame; but if the scene switching occurs in the P frame, because its reference frame is the previous For an I frame or P frame, the reference frame is in a different scene from the current ...

AI Technical Summary

Problems solved by technology

It can effectively distinguish the motion of video objects and sudden scene switching, and can also effectively detect soft switching such as ablation and fade-in and fade-out; but for the detection of sudden scene switching, there is no performance advantage compared to the gray value-based method. and require greater computational complexity

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