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Unsupervised domain adaptive person re-identification via camera penalty learning

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Abstract

Unsupervised domain adaptive (UDA) person re-identification (re-ID) aims to adapt the model trained on a labeled source domain to an unlabeled target domain. For pseudo-label-based UDA methods, pseudo label noise is the main problem for model degradation and cross-camera problem is one main factor to cause this noise. In this paper, a novel camera penalty learning (CPL) UDA person re-ID method is proposed to address this problem. The possibility of selecting wrong negative sample and positive sample is relatively high in conventional triplet loss due to cross-camera problem. To alleviate this problem, a camera-penalty-based triplet loss (PTL) is designed. It adds camera-ID-penalty to conventional triplet loss to reduce sample distance imbalance, thereby improving the quality of pseudo labels. In order to reduce the dependence on pseudo labels and improve the robustness, a camera-penalty-neighborhood loss (PNL) is designed and combined with the push loss (PL). The PNL minimizes the distance between one image and its camera-penalty-weighted neighbors. The PL maximizes the distances among all images. The proposed CPL model achieves considerable results of 87.4%/70.7% and 75.2%/59.0% Rank-1/ mAP on DukeMTMC-reID-to-Market-1501 and Market-1501-to-DukeMTMC-reID UDA tasks.

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Data availability

The datasets are a publicly available datasets.

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Acknowledgments

The work was supported in part by the National Nature Science Foundation of China [grant number 61872030] and Major Science and Technology Innovation Project of Shandong Province [grant number 2019TSLH0206].

Code availability

When accepted, the code can be publicly available.

Funding

This study was funded by the National Nature Science Foundation of China [grant number 61872030] and Major Science and Technology Innovation Project of Shandong Province [grant number 2019TSLH0206].

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Correspondence to Yanfeng Li.

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Yanfeng Li has received research grants from National Nature Science Foundation of China. Houjin Chen has research grants from Major Science and Technology Innovation Project of Shandong Province.

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Zhu, X., Li, Y., Sun, J. et al. Unsupervised domain adaptive person re-identification via camera penalty learning. Multimed Tools Appl 80, 15215–15232 (2021). https://doi.org/10.1007/s11042-021-10589-6

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  • DOI: https://doi.org/10.1007/s11042-021-10589-6

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