{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/re-id-ar-improved-person-re-identification-in","title":"Re-ID-AR: Improved Person Re-identification in Video via Joint Weakly Supervised Action Recognition","arxiv_id":null,"date":"2021-11-01","proceeding":"BMVC 2021 11","authors":["Alsehaim","A.","Breckon","T.P."],"abstract":"We uniquely consider the task of joint person re-identification (Re-ID) and action recognition in video as a multi-task problem. In addition to the broader potential of joint Re-ID and action recognition within the context of automated multi-camera surveillance, we show that the consideration of action recognition in addition to Re-ID results in a model that learns discriminative feature representations that both improve Re-ID performance and are capable of providing viable per-view (clip-wise) action recognition. Our approach uses a single 2D Convolutional Neural Network (CNN) architecture comprising a common ResNet50-IBN backbone CNN architecture, to extract frame-level features with subsequent temporal attention for clip level feature extraction, followed by two sub-branches:- the IDentification (sub-)Network (IDN) for person Re-ID and the Action Recognition (sub-)Network for per-view action recognition. The IDN comprises a single fully connected layer while the ARN comprises multiple attention blocks on a one-to-one ratio with the number of actions to be recognised. This is subsequently trained as a joint Re-ID and action recognition task using a combination of two task-specific, multi-loss terms via weakly labelled actions obtained over two leading benchmark Re-ID datasets (MARS, LPW). Our consideration of Re-ID and action recognition as a multi-task problem results in a multi-branch 2D CNN architecture that outperforms prior work in the field (rank-1 (mAP) – MARS: 93.21%(87.23%), LPW: 79.60%) without any reliance 3D convolutions or multi-stream networks architectures as found in other contemporary work. Our work represents the first benchmark performance for such a joint Re-ID and action recognition video understanding task, hitherto unapproached in the literature, and is accompanied by a new public dataset of supplementary action labels for the seminal MARS and LPW Re-ID datasets.","url_abs":"https://www.bmvc2021-virtualconference.com/assets/papers/0694.pdf","url_pdf":"https://www.bmvc2021-virtualconference.com/assets/papers/0694.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"abstracts"},"code_links":[{"paper_slug":"re-id-ar-improved-person-re-identification-in","repo_url":"https://github.com/AishahAADU/Re-ID-AR","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":0,"framework":"pytorch","reach":null}],"tasks":[{"task_slug":"action-recognition-in-videos","task_name":"Action Recognition"},{"task_slug":"person-re-identification","task_name":"Person Re-Identification"},{"task_slug":"video-understanding","task_name":"Video Understanding"},{"task_slug":"weakly-supervised-action-recognition","task_name":"Weakly-Supervised Action Recognition"}],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}