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Title: New block-based motion estimation for sequences with brightness variation and its application to static sprite generation for video compression
Authors: Cheung, HK
Siu, WC 
Feng, DD
Cai, T
Keywords: Brightness variation compensation
Global motions
Motion estimation
Sprite generation and MPEG-4
Video coding
Issue Date: Apr-2008
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on circuits and systems for video technology, Apr. 2008, v. 18, no. 4, p. 522-527 How to cite?
Journal: IEEE transactions on circuits and systems for video technology 
Abstract: In this brief, a new local motion estimator is proposed which can accurately estimate motion activities under varying strong brightness conditions. The proposed estimator makes use of a new block division technique which manages practically to get rid of the adverse influence caused by brightness changes between frames. We also propose a new static sprite coding system using the proposed local motion estimator. The system is characterized not only with the features of accurate motion estimation under varying brightness conditions, but also possesses the capability of coding the brightness variability of the background scene using a single layered sprite image. Experimental results show that the resulting static sprite coding system improves the PSNR by 6.32 dB as compared with the conventional static sprite coding system when the background scenes of the video sequences involve strong brightness variations in the spatial and time domains.
ISSN: 1051-8215
EISSN: 1558-2205
DOI: 10.1109/TCSVT.2008.918549
Rights: © 2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
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