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- W3204200229 abstract "Human pose is a useful feature for fine-grained sports action understanding. However, pose estimators are often unreliable when run on sports video due to domain shift and factors such as motion blur and occlusions. This leads to poor accuracy when downstream tasks, such as action recognition, depend on pose. End-to-end learning circumvents pose, but requires more labels to generalize. We introduce Video Pose Distillation (VPD), a weakly-supervised technique to learn features for new video domains, such as individual sports that challenge pose estimation. Under VPD, a student network learns to extract robust pose features from RGB frames in the sports video, such that, whenever pose is considered reliable, the features match the output of a pretrained teacher pose detector. Our strategy retains the best of both pose and end-to-end worlds, exploiting the rich visual patterns in raw video frames, while learning features that agree with the athletes' pose and motion in the target video domain to avoid over-fitting to patterns unrelated to athletes' motion. VPD features improve performance on few-shot, fine-grained action recognition, retrieval, and detection tasks in four real-world sports video datasets, without requiring additional ground-truth pose annotations." @default.
- W3204200229 created "2021-10-11" @default.
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- W3204200229 date "2021-09-03" @default.
- W3204200229 modified "2023-09-24" @default.
- W3204200229 title "Video Pose Distillation for Few-Shot, Fine-Grained Sports Action Recognition" @default.
- W3204200229 doi "https://doi.org/10.48550/arxiv.2109.01305" @default.
- W3204200229 hasPublicationYear "2021" @default.
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