Towards grouping in large scenes with occlusion-aware spatio-temporal transformers

Zhang, Jinsong, Gu, Lingfeng, Lai, Yu-Kun ORCID: https://orcid.org/0000-0002-2094-5680, Wang, Xueyang and Li, Kun 2024. Towards grouping in large scenes with occlusion-aware spatio-temporal transformers. IEEE Transactions on Circuits and Systems for Video Technology 34 (5) , pp. 3919-3929. 10.1109/TCSVT.2023.3324868

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Abstract

Group detection, especially for large-scale scenes, has many potential applications for public safety and smart cities. Existing methods fail to cope with frequent occlusions in large-scale scenes with multiple people, and are difficult to effectively utilize spatio-temporal information. In this paper, we propose an end-to-end framework, GroupTransformer , for group detection in large-scale scenes. To deal with the frequent occlusions caused by multiple people, we design an occlusion encoder to detect and suppress severely occluded person crops. To explore the potential spatio-temporal relationship, we propose spatio-temporal transformers to simultaneously extract trajectory information and fuse inter-person features in a hierarchical manner. Experimental results on both large-scale and small-scale scenes demonstrate that our method achieves better performance compared with state-of-the-art methods. On large-scale scenes, our method significantly boosts the performance in terms of precision and F1 score by more than 10%. On small-scale scenes, our method still improves the performance of F1 score by more than 5%. We will release the code for research purposes .

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Computer Science & Informatics
Publisher:	Institute of Electrical and Electronics Engineers
ISSN:	1051-8215
Date of First Compliant Deposit:	21 March 2024
Date of Acceptance:	8 October 2023
Last Modified:	10 Nov 2024 03:15
URI:	https://orca.cardiff.ac.uk/id/eprint/167434

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