Abstract
This paper presents a Riemannian discriminative learning framework for multiple-shot person re-identification. Firstly, image regions are encoded into covariance matrices or a Gaussian extension as robust feature descriptors. Since these matrices lie on some specific Riemannian manifolds, we introduce a manifold averaging strategy to fuse the feature descriptors from multiple images for a holistic representation, and exploit Riemannian kernels to implicitly map the averaged matrices to a Reproducing Kernel Hilbert Space (RKHS), where conventional discriminative learning algorithms can be conducted. In particular, we apply kernel variants of two typical methods, i.e., the Linear Discriminant Analysis (LDA) and Metric Learning to Rank (MLR), to demonstrate the flexibility of the framework. Extensive experiments on five public datasets exhibit impressive improvements over existing multiple-shot re-identification methods as well as representative single-shot approaches.
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The source code is released on our website: http://vipl.ict.ac.cn/resources/codes.
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Acknowledgement
This work is partially supported by 973 Program under contract No. 2015CB351802, Natural Science Foundation of China under contracts Nos. 61390511, 61379083, 61272321, 61271445, and Youth Innovation Promotion Association CAS No. 2015085.
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Lu, Y., Wang, R., Shan, S., Chen, X. (2017). Multiple-Shot Person Re-identification via Riemannian Discriminative Learning. In: Chen, CS., Lu, J., Ma, KK. (eds) Computer Vision – ACCV 2016 Workshops. ACCV 2016. Lecture Notes in Computer Science(), vol 10118. Springer, Cham. https://doi.org/10.1007/978-3-319-54526-4_30
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