Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for estimating the dominant motion in a sequence of images

A technology of image sequence and motion, applied in image analysis, image communication, image data processing, etc., can solve problems such as complex implementation, and achieve the effect of reducing costs

Inactive Publication Date: 2008-08-13
THOMSON LICENSING SA
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have the disadvantage of being very complex to implement

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for estimating the dominant motion in a sequence of images
  • Method for estimating the dominant motion in a sequence of images
  • Method for estimating the dominant motion in a sequence of images

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] Characterization of dominant motion in the image sequence includes identification of a parametric model of apparent dominant motion. In the case of using motion vector fields obtained from compressed video streams, the model must represent apparent motion in a two-dimensional image plane. Such a model is obtained by approximating the projection onto the image plane of the motion of the object in three-dimensional space. As an example, the affine model shown above with 6 parameters (a, b, c, d, e, f) is commonly used in the literature.

[0038]Basically, the proposed method consists in identifying this parametric model of motion from the motion vector field provided in the video stream when the coding criterion uses motion compensation techniques such as MPEG-1, MPEG-2 and MPEG-4 standards, thus Perform its decoding. However, the method according to the invention is also applicable to motion vector fields calculated by independent processing from the images making up t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The dominant movement estimation calculates (1) the movement vector field associated with an image. Movement is modelled with simplified parameters (2) using vectors representing movement translation and a divergence factor characterizing the zoom component. Robust linear regression (3) is carried out in each of the vector spaces. The movement parameters are calculated (4,5) from the origin coordinates and the regression line peaks.

Description

technical field [0001] The present invention relates to a method and apparatus for estimating dominant motion in a video shot. More specifically, the method is based on the analysis of the motion field transmitted with the video in a compression scheme using motion compensation. This scheme is implemented in the MPEG-1, MPEG-2 and MPEG-4 video compression standards. Background technique [0002] It is known that motion analysis relies on the estimation of motion models, usually affine, from motion vectors derived from MPEG-type compressed video streams: [0003] u ( x i + y i ) = a x i + b ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/34G06T7/20G06F17/30H04N5/14H04N19/51H03M7/36
CPCG06T7/20H04N5/145H04N19/51
Inventor 弗朗索瓦丝·勒克莱尔西尔万·马雷克
Owner THOMSON LICENSING SA