MPEG-4 Video Retrieval Using Video-Objects and Edge Potential Functions

13 years 10 months ago

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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.

Minh-Son Dao, Francesco G. B. De Natale, Andrea Ma

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