MPEG-4 video retrieval using video-objects and edge potential functions

Authors:
Minh-Son Dao;Francesco G. B. DeNatale;Andrea Massa
Affiliations:
DIT, University of Trento, Trento, Italy;DIT, University of Trento, Trento, Italy;DIT, University of Trento, Trento, Italy
Venue:
PCM'04 Proceedings of the 5th Pacific Rim conference on Advances in Multimedia Information Processing - Volume Part III
Year:
2004

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Abstract

A novel video retrieval tool based on MPEG-4 video object (VO) representation is presented. The algorithm extends the concept of edge potential functions (EPF), already used in shape-based image retrieval, tailored to work on shapes extracted from VO planes defined in MPEG-4 syntax. First, key frames are selected from the VO sequence by detecting significant object deformations. Then, object boundaries are extracted from each key frame by a simple manipulation of the relevant object plane bitmap, and normalized. Finally a shape-EPF (S-EPF) is calculated from the normalized boundaries and used to perform the matching with user's query. Experimental results demonstrate that the proposed algorithm is efficient and fast in indexing a video sequence according to the presence of specific video objects.