Mining Conditional Part Semantics with Occluded Extrapolation for Human-Object Interaction Detection

• URL: http://arxiv.org/abs/2307.10499v2
• Date: Mon, 13 Nov 2023 09:23:53 GMT
• Title: Mining Conditional Part Semantics with Occluded Extrapolation for Human-Object Interaction Detection
• Authors: Guangzhi Wang, Yangyang Guo, Mohan Kankanhalli
• Abstract summary: Human-Object Interaction Detection is a crucial aspect of human-centric scene understanding. Existing methods try to use human-related clues to alleviate the difficulty, but rely heavily on external annotations or knowledge. We propose a novel Part Semantic Network (PSN) to solve this problem.
• Score: 16.9278983497498
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Human-Object Interaction Detection is a crucial aspect of human-centric scene understanding, with important applications in various domains. Despite recent progress in this field, recognizing subtle and detailed interactions remains challenging. Existing methods try to use human-related clues to alleviate the difficulty, but rely heavily on external annotations or knowledge, limiting their practical applicability in real-world scenarios. In this work, we propose a novel Part Semantic Network (PSN) to solve this problem. The core of PSN is a Conditional Part Attention (CPA) mechanism, where human features are taken as keys and values, and the object feature is used as query for the computation in a cross-attention mechanism. In this way, our model learns to automatically focus on the most informative human parts conditioned on the involved object, generating more semantically meaningful features for interaction recognition. Additionally, we propose an Occluded Part Extrapolation (OPE) strategy to facilitate interaction recognition under occluded scenarios, which teaches the model to extrapolate detailed features from partially occluded ones. Our method consistently outperforms prior approaches on the V-COCO and HICO-DET datasets, without external data or extra annotations. Additional ablation studies validate the effectiveness of each component of our proposed method.

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