Approximating optical flow within the MPEG-2 compressed domain

Author

Coimbra, M.T. ; Davies, M.

Author_Institution

Dept. of Electron. Eng., Queen Mary Univ. of London, UK

Volume

15

Issue

1

fYear

2005

Firstpage

103

Lastpage

107

Abstract

MPEG-2 compressed domain information, namely motion vectors and DCT coefficients, is filtered and manipulated to obtain a motion field using a two-dimensional (2-D) translational model. The results are compared to a popular optical flow method, more specifically the one presented by Lucas and Kanade (1981), revealing very good results. Our method provides a very fast motion estimation tool that can be useful for applications where algorithmic cost is critical, such as surveillance systems. All methods are theoretically explained and their efficiency confirmed on real-world data.

Keywords

data compression; discrete cosine transforms; image sequences; motion estimation; transform coding; video coding; 2D translational model; MPEG-2 compressed domain; discrete cosine transform coefficient; motion estimation; motion field; motion vector; optical flow method; Costs; Discrete cosine transforms; Image motion analysis; Information filtering; Information filters; Motion estimation; Optical filters; Surveillance; Transform coding; Two dimensional displays; Compressed domain information; motion estimation; motion vectors; optical flow;

fLanguage

English

Journal_Title

Circuits and Systems for Video Technology, IEEE Transactions on

Publisher

ieee

ISSN

1051-8215

Type

jour

DOI

10.1109/TCSVT.2004.837016

Filename

1377364