Probabilistic space-time video modeling via piecewise GMM

IEEE Transactions on Pattern Analysis and Machine Intelligence
Hayit GreenspanArnaldo Mayer

Abstract

In this paper, we describe a statistical video representation and modeling scheme. Video representation schemes are needed to segment a video stream into meaningful video-objects, useful for later indexing and retrieval applications. In the proposed methodology, unsupervised clustering via Gaussian mixture modeling extracts coherent space-time regions in feature space, and corresponding coherent segments (video-regions) in the video content. A key feature of the system is the analysis of video input as a single entity as opposed to a sequence of separate frames. Space and time are treated uniformly. The probabilistic space-time video representation scheme is extended to a piecewise GMM framework in which a succession of GMMs are extracted for the video sequence, instead of a single global model for the entire sequence. The piecewise GMM framework allows for the analysis of extended video sequences and the description of nonlinear, nonconvex motion patterns. The extracted space-time regions allow for the detection and recognition of video events. Results of segmenting video content into static versus dynamic video regions and video content editing are presented.

Citations

Jul 4, 2009·IEEE Transactions on Pattern Analysis and Machine Intelligence·Amit AdamEhud Rivlin
Dec 21, 2007·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Xiaomu Song, Guoliang Fan
Nov 2, 2006·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Gwenaëlle PiriouJian-Feng Yao

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