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- W4313193611 abstract "In this work, we focus on semi-supervised learning for video action detection which utilizes both labeled as well as unlabeled data. We propose a simple end-to-end consistency based approach which effectively utilizes the unlabeled data. Video action detection requires both, action class prediction as well as a spatio-temporal localization of actions. Therefore, we investigate two types of constraints, classification consistency, and spatio-temporal consistency. The presence of predominant background and static regions in a video makes it challenging to utilize spatio-temporal consistency for action detection. To address this, we propose two novel regularization constraints for spatio-temporal consistency; 1) temporal coherency, and 2) gradient smoothness. Both these aspects exploit the temporal continuity of action in videos and are found to be effective for utilizing unlabeled videos for action detection. We demonstrate the effectiveness of the proposed approach on two different action detection benchmark datasets, UCF101-24 and IHMDB-21. In addition, we also show the effectiveness of the proposed approach for video object segmentation on the Youtube-VOS which demonstrates its generalization capability The proposed approach achieves competitive performance by using merely 20% of annotations on UCF101-24 when compared with recent fully supervised methods. On UCF101-24, it improves the score by +8.9% and +11% at 0.5 f-mAP and v-mAP respectively, compared to supervised approach. The code and models will be made publicly available at: https://github.com/AKASH2907/End-to-End-Semi-Supervised-Learning-for-Video-Action-Detection." @default.
- W4313193611 created "2023-01-06" @default.
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- W4313193611 date "2022-06-01" @default.
- W4313193611 modified "2023-10-15" @default.
- W4313193611 title "End-to-End Semi-Supervised Learning for Video Action Detection" @default.
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- W4313193611 doi "https://doi.org/10.1109/cvpr52688.2022.01429" @default.
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