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Journal of Electronic Imaging

Pose-based gait recognition with local gradient descriptors and hierarchically aggregated residuals
Author(s): Dimitris Kastaniotis; Ilias Theodorakopoulos; Spiros Fotopoulos
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Paper Abstract

We focus on the problem of pose-based gait recognition. Our contribution is two-fold. First, we incorporate a local histogram descriptor that allows us to encode the trajectories of selected limbs via a one-dimensional version of histogram of oriented gradients features. In this way, a gait sequence is encoded into a sequence of local gradient descriptors. Second, we utilize a robust encoding method in which the residuals of local descriptors, with respect to a discriminative model, are aggregated into fixed length vectors. This technique combines the advantages of both residual aggregation and soft-assignment techniques, resulting in a powerful vector representation. For classification purposes, we use a nonlinear kernel to map vectors into a reproducing kernel Hilbert space. Then, we classify an encoded gait sequence according to the sparse representation-based classification method. Experimental evaluation on two publicly available datasets demonstrates the effectiveness of the proposed scheme on both recognition and verification tasks.

Paper Details

Date Published: 14 December 2016
PDF: 9 pages
J. Electron. Imag. 25(6) 063019 doi: 10.1117/1.JEI.25.6.063019
Published in: Journal of Electronic Imaging Volume 25, Issue 6
Show Author Affiliations
Dimitris Kastaniotis, Univ. of Patras (Greece)
Ilias Theodorakopoulos, Univ. of Patras (Greece)
Spiros Fotopoulos, Univ. of Patras (Greece)

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