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Proceedings Paper

Feature point extraction in compressed domain
Author(s): Renan Coudray; Bernard Besserer; Pierre Courtellemont
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Paper Abstract

This document presents several approaches to extract interest points within compressed images (based on DCT compression methods). The goal is to minimize the stages and/or the calculation costs for image sequence indexing tasks or database retrieval from a significant MPEG file repository. Initially, only the fixed images (I-Frames) are take under consideration, motion will be integrated in further research. The traditional invariant feature points (Harris corner points, points with remarquable principal curvatures) are extracted from images using a gradient estimate (first order derivative) or the Laplacian (second-order derivative) of an image. So the first part of this paper handles in detail the derivation of the signal from DCT blocks. The trials to implement feature points detection as close as possible to the DCT coefficient are explained. Results provided by our last DCT-blockwise curvature estimatiorare also shown.

Paper Details

Date Published: 10 January 2003
PDF: 10 pages
Proc. SPIE 5021, Storage and Retrieval for Media Databases 2003, (10 January 2003); doi: 10.1117/12.476262
Show Author Affiliations
Renan Coudray, Univ. de La Rochelle (France)
Bernard Besserer, Univ. de La Rochelle (France)
Pierre Courtellemont, Univ. de La Rochelle (France)

Published in SPIE Proceedings Vol. 5021:
Storage and Retrieval for Media Databases 2003
Minerva M. Yeung; Rainer W. Lienhart; Chung-Sheng Li, Editor(s)

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