Watershed algorithm for moving object extraction considering energy minimization by snakes

MPEG-4, which is a video coding standard, supports object-based functionalities for high efficiency coding. MPEG-7, a multimedia content description interface, handles the object data in, for example, retrieval and/or editing systems. Therefore, extraction of semantic video objects is an indispensab...

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Bibliographic Details
Main Authors: Imamura, K., Hiraoka, M., Hashimoto, H.
Format: Conference Proceeding
Language:English
Subjects:
Content based retrieval
Data mining
Information retrieval
Minimization methods
MPEG 4 Standard
MPEG 7 Standard
Multimedia systems
Shape
Surface topography
Video coding
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Summary:MPEG-4, which is a video coding standard, supports object-based functionalities for high efficiency coding. MPEG-7, a multimedia content description interface, handles the object data in, for example, retrieval and/or editing systems. Therefore, extraction of semantic video objects is an indispensable tool that benefits these newly developed schemes. In the present paper, we propose a technique that extracts the shape of moving objects by combining snakes and watershed algorithm. The proposed method comprises two steps. In the first step, snakes extract contours of moving objects as a result of the minimization of an energy function. In the second step, the conditional watershed algorithm extracts contours from a topographical surface including a new function term. This function term is introduced to improve the estimated contours considering boundaries of moving objects obtained by snakes. The efficiency of the proposed approach in moving object extraction is demonstrated through computer simulations.
DOI:10.1109/AVSS.2007.4425367