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Ordinal distribution regression for gait-based age estimation

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  • Special Focus on Deep Learning for Computer Vision
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Abstract

Computer vision researchers prefer to estimate age from face images because facial features provide useful information. However, estimating age from face images becomes challenging when people are distant from the camera or occluded. A person’s gait is a unique biometric feature that can be perceived efficiently even at a distance. Thus, gait can be used to predict age when face images are not available. However, existing gait-based classification or regression methods ignore the ordinal relationship of different ages, which is an important clue for age estimation. This paper proposes an ordinal distribution regression with a global and local convolutional neural network for gait-based age estimation. Specifically, we decompose gait-based age regression into a series of binary classifications to incorporate the ordinal age information. Then, an ordinal distribution loss is proposed to consider the inner relationships among these classifications by penalizing the distribution discrepancy between the estimated value and the ground truth. In addition, our neural network comprises a global and three local sub-networks, and thus, is capable of learning the global structure and local details from the head, body, and feet. Experimental results indicate that the proposed approach outperforms state-of-the-art gait-based age estimation methods on the OULP-Age dataset.

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Acknowledgements

This work was supported in part by National Natural Science Foundation of China (Grant No. 61673118), Shanghai Municipal Science and Technology Major Project (Grant No. 2018SHZDZX01), ZJLab, and Shanghai Pujiang Program (Grant No. 16PJD009). We are grateful to the reviewers and the Associate Editor for their constructive comments.

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Authors and Affiliations

  1. Shanghai Key Lab of Intelligent Information Processing, School of Computer Science, Fudan University, Shanghai, 200433, China

    Haiping Zhu, Yuheng Zhang, Guohao Li & Junping Zhang

  2. Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY, 12180, USA

    Hongming Shan

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  1. Haiping Zhu
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  2. Yuheng Zhang
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  3. Guohao Li
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  4. Junping Zhang
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Correspondence to Junping Zhang.

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Zhu, H., Zhang, Y., Li, G. et al. Ordinal distribution regression for gait-based age estimation. Sci. China Inf. Sci. 63, 120102 (2020). https://doi.org/10.1007/s11432-019-2733-4

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  • DOI: https://doi.org/10.1007/s11432-019-2733-4

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