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Local Sliced Wasserstein Feature Sets for Illumination Invariant Face Recognition
Yan Zhuang1,2, Shiying Li3, Mohammad Shifat-E-Rabbi3
1Windreich Department of Artificial Intelligence and Human Health, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
Abstract:
We present a new method for face recognition from digital images acquired under varying illumination conditions. The method is based on mathematical modeling of local gradient distributions using the Radon Cumulative Distribution Transform (R-CDT) [1]. We demonstrate that lighting variations cause certain types of deformations of local image gradient distributions which, when expressed in R-CDT domain, can be modeled as a subspace. Face recognition is then performed using a nearest subspace method in R-CDT domain of local gradient distributions. Experimental results demonstrate the proposed method outperforms other alternatives in several face recognition tasks with challenging illumination conditions. Python code implementing the proposed method is publicly available, which is integrated as a part of the software package PyTransKit.
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