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Method and device for evaluating video sequence distortion

A technology of video sequence and evaluation method, which is applied in television, electrical components, image communication, etc., and can solve the problems of inconsistency in evaluation results and decline in memory strength

Active Publication Date: 2012-11-07
ZHEJIANG UNIV
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Problems solved by technology

[0005] The main problem of objective quality assessment is that its assessment results cannot be highly consistent with subjective scoring results
[0018] Furthermore, the memory strength of people's working memory (working memory) records objects declines over time

Method used

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  • Method and device for evaluating video sequence distortion
  • Method and device for evaluating video sequence distortion
  • Method and device for evaluating video sequence distortion

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specific Embodiment approach

[0076] The video quality assessment method includes: distorting each local area in each frame of the video sequence, using the texture intensity factor, gaze point distance factor, motion intensity factor and distortion area factor to calculate the local area distortion For the corresponding distortion sensitivity factor, the sum of the products of each local area distortion and its corresponding distortion sensitivity factor in each frame is used as the distortion sum of the frame; for each frame in the video sequence, according to the respective The distortion sum described in the frame is obtained to obtain the distortion sum correction value of the frame; the time domain weight value is obtained according to each frame at the corresponding moment in the video sequence, and the distortion sum correction value described in all frames and the corresponding time domain weight value are calculated. The sum of the products, divided by a normalized value, gives the average distort...

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Abstract

The invention provides a method and a device for evaluating video sequence distortion. The method for evaluating the video sequence distortion includes: as for distortion of each local region in each frame of a video sequence, obtaining a distortion sensitivity factor corresponding to the distortion by the aid of a texture intensity factor, a fixation point factor, a movement intensity factor and a distortion area factor at the position of the distortion, and taking a sum of products of the distortion of all local regions in each frame and the corresponding distortion sensitivity factors of the distortion as a distortion sum of the frame; as for each frame in the video sequence, obtaining a distortion sum corrected value of the frame according to a distortion sum of one of a plurality of frames adjacent to the frame; and obtaining a time domain weight number of the frame according to a corresponding moment of the frame in the video sequence, calculating a sum of products of distortion sum corrected values of all the frames and time domain weight numbers corresponding to the frames, and dividing a normalized numerical value so that average distortion of the video sequence is obtained. The average distortion of the video sequence obtained by the method is highly consistent with a subjective video quality evaluation result.

Description

technical field [0001] The invention relates to the field of multimedia communication, in particular to a video sequence distortion evaluation method. Background technique [0002] At present, with the rapid development of multimedia technology and the rapid development of various video processing technologies, people's demand for high-quality video is also increasing. Lossy compression, transmission and other processing of the original video sequence will often introduce distortion, making the processed video sequence different from its corresponding original video sequence, and these differences generally cause the visual quality of the video sequence to be different from that of the original video sequence. dropped. In this specification, "video sequence" refers to a lossy video sequence obtained after processing a lossless "original video sequence". Video quality assessment technology, as a criterion for judging the pros and cons of various video processing technologie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00H04N7/26
Inventor 虞露赵寅
Owner ZHEJIANG UNIV
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