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Method of judging motion cause by means of video motion vectors

A motion vector and motion technology, applied in the multimedia field, can solve problems such as the difficulty of analyzing time series motion models

Inactive Publication Date: 2008-05-28
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of very cluttered video background or object motion, it is very difficult to analyze the motion model on the time series
[0007] Papers [6][7] use the directional correlation between motion vectors to analyze camera motion in compressed video streams, but assume that camera motion dominates video motion

Method used

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  • Method of judging motion cause by means of video motion vectors
  • Method of judging motion cause by means of video motion vectors
  • Method of judging motion cause by means of video motion vectors

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Experimental program
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Embodiment Construction

[0056] 1. Motion vector field feature extraction

[0057] A specific motion vector field is taken as an example to illustrate the feature extraction method.

[0058] Here we are dealing with an MPEG-1 compressed video stream, and the motion vectors are taken directly from the MPEG-1 compressed video stream. attached image 3 It is a motion vector field, which is composed of 15×22 motion vectors, and each motion vector has two attributes of direction and modulus. Calculate the total number of macroblocks N=330, the number of intra-coded macroblocks N nmv =9, the number N of macroblocks with slight motion smv = 7, so

[0059] H [ 0 ] = N nmv N = 9 330 ≈ 0.0272727

[0060] H [ 1 ] = N smv ...

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Abstract

This invention belongs to multi-media technique field and relates to one motion vector judgment cause method by use of visual frequency, which Provides the idea of importance for motion cause and then forms one fiber motion characteristic vector H according to the distribution characteristics in the visual motion vector space and motion vector interacting relationship and then adopts sorting method based on the vector machine to judge the motion cause.

Description

technical field [0001] The invention belongs to the field of multimedia technology, and in particular relates to a method for judging the cause of motion by using motion vectors of videos. Background technique [0002] The increasingly advanced multimedia technology produces rich multimedia content, and the rapid expansion of the Internet facilitates the rapid dissemination of multimedia content, so content-based multimedia retrieval technology becomes very important. In content-based multimedia retrieval technology, video motion information helps to bridge the gap between low-level features and high-level semantics to some extent. [0003] Motion in a video is usually a combination of object motion and camera motion, and may be caused by object motion or camera motion alone, or by both object motion and camera motion. Typically, object motion causes local motion, while camera motion induces global motion. [0004] Therefore, the cause of motion in the video can be divided...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N19/139H04N19/176
Inventor 薛向阳许源密聪杰朱兴全
Owner FUDAN UNIV