Unsupervised Person Re-Identification with Multi-Label Learning Guided Self-Paced Clustering

• URL: http://arxiv.org/abs/2103.04580v1
• Date: Mon, 8 Mar 2021 07:30:13 GMT
• Title: Unsupervised Person Re-Identification with Multi-Label Learning Guided Self-Paced Clustering
• Authors: Qing Li, Xiaojiang Peng, Yu Qiao, Qi Hao
• Abstract summary: Unsupervised person re-identification (Re-ID) has drawn increasing research attention recently. In this paper, we address the unsupervised person Re-ID with a conceptually novel yet simple framework, termed as Multi-label Learning guided self-paced Clustering (MLC) MLC mainly learns discriminative features with three crucial modules, namely a multi-scale network, a multi-label learning module, and a self-paced clustering module.
• Score: 48.31017226618255
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Although unsupervised person re-identification (Re-ID) has drawn increasing research attention recently, it remains challenging to learn discriminative features without annotations across disjoint camera views. In this paper, we address the unsupervised person Re-ID with a conceptually novel yet simple framework, termed as Multi-label Learning guided self-paced Clustering (MLC). MLC mainly learns discriminative features with three crucial modules, namely a multi-scale network, a multi-label learning module, and a self-paced clustering module. Specifically, the multi-scale network generates multi-granularity person features in both global and local views. The multi-label learning module leverages a memory feature bank and assigns each image with a multi-label vector based on the similarities between the image and feature bank. After multi-label training for several epochs, the self-paced clustering joins in training and assigns a pseudo label for each image. The benefits of our MLC come from three aspects: i) the multi-scale person features for better similarity measurement, ii) the multi-label assignment based on the whole dataset ensures that every image can be trained, and iii) the self-paced clustering removes some noisy samples for better feature learning. Extensive experiments on three popular large-scale Re-ID benchmarks demonstrate that our MLC outperforms previous state-of-the-art methods and significantly improves the performance of unsupervised person Re-ID.

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