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In-Person Poster presentation / poster accept

Weakly-supervised HOI Detection via Prior-guided Bi-level Representation Learning

Bo Wan · Yongfei Liu · Desen Zhou · Tinne Tuytelaars · Xuming He

MH1-2-3-4 #60

Keywords: [ weakly-supervised learning ] [ CLIP-guided Representation Learning ] [ HOI Detection ] [ Deep Learning and representational learning ]


Abstract:

Human object interaction (HOI) detection plays a crucial role in human-centric scene understanding and serves as a fundamental building block for many vision tasks. One generalizable and scalable strategy for HOI detection is to use weak supervision, learning from image-level annotations only. This is inherently challenging due to ambiguous human-object associations, large search space of detecting HOIs and highly noisy training signal. A promising strategy to address those challenges is to exploit knowledge from large-scale pretrained models (e.g., CLIP), but a direct knowledge distillation strategy does not perform well on the weakly-supervised setting. In contrast, we develop a CLIP-guided HOI representation capable of incorporating the prior knowledge at both image level and HOI instance level, and adopt a self-taught mechanism to prune incorrect human-object associations. Experimental results on HICO-DET and V-COCOshow that our method outperforms the previous works by a sizable margin, showing the efficacy of our HOI representation.

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