Generalized Pooling for Robust Object Tracking

Ma, Bo, Hu, Hongwei, Shen, Jianbing, Liu, Yangbiao and Shao, Ling (2016) Generalized Pooling for Robust Object Tracking. IEEE Transactions on Image Processing, 25 (9). pp. 4199-4208. ISSN 1057-7149

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Feature pooling in a majority of sparse coding-based tracking algorithms computes final feature vectors only by low-order statistics or extreme responses of sparse codes. The high-order statistics and the correlations between responses to different dictionary items are neglected. We present a more generalized feature pooling method for visual tracking by utilizing the probabilistic function to model the statistical distribution of sparse codes. Since immediate matching between two distributions usually requires high computational costs, we introduce the Fisher vector to derive a more compact and discriminative representation for sparse codes of the visual target. We encode target patches by local coordinate coding, utilize Gaussian mixture model to compute Fisher vectors, and finally train semi-supervised linear kernel classifiers for visual tracking. In order to handle the drifting problem during the tracking process, these classifiers are updated online with current tracking results. The experimental results on two challenging tracking benchmarks demonstrate that the proposed approach achieves a better performance than the state-of-the-art tracking algorithms.

Item Type: Article
Uncontrolled Keywords: sparse coding, object tracking, feature pooling, Fisher kernel, local coordinate coding
Subjects: G400 Computer Science
Department: Faculties > Engineering and Environment > Computer and Information Sciences
Depositing User: Ay Okpokam
Date Deposited: 06 Sep 2016 09:44
Last Modified: 12 Oct 2019 20:45

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