Mr. Haoran Yi Profile

Haoran Yi

at Univ of Illinois

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Proceedings Article | 29 January 2007 Paper

A spatiotemporal decomposition strategy for personal home video management

Haoran Yi, Igor Kozintsev, Marzia Polito, Yi Wu, Jean-Yves Bouguet, Ara Nefian, Carole Dulong

Proceedings Volume 6506, 65060Q (2007) https://doi.org/10.1117/12.704599

KEYWORDS: Video, Feature extraction, Image retrieval, Image segmentation, Video surveillance, Sensors, Motion measurement, Cameras, Digital video recorders, Multimedia

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With the advent and proliferation of low cost and high performance digital video recorder devices, an increasing number of personal home video clips are recorded and stored by the consumers. Compared to image data, video data is lager in size and richer in multimedia content. Efficient access to video content is expected to be more challenging than image mining. Previously, we have developed a content-based image retrieval system and the benchmarking framework for personal images. In this paper, we extend our personal image retrieval system to include personal home video clips. A possible initial solution to video mining is to represent video clips by a set of key frames extracted from them thus converting the problem into an image search one. Here we report that a careful selection of key frames may improve the retrieval accuracy. However, because video also has temporal dimension, its key frame representation is inherently limited. The use of temporal information can give us better representation for video content at semantic object and concept levels than image-only based representation. In this paper we propose a bottom-up framework to combine interest point tracking, image segmentation and motion-shape factorization to decompose the video into spatiotemporal regions. We show an example application of activity concept detection using the trajectories extracted from the spatio-temporal regions. The proposed approach shows good potential for concise representation and indexing of objects and their motion in real-life consumer video.

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