JARViS: Detecting Actions in Video Using Unified Actor-Scene Context Relation Modeling

Seok Hwan Lee; Taein Son; Soo Won Seo; Jisong Kim; Jun Won Choi

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arXiv · 2408.03612

JARViS: Detecting Actions in Video Using Unified Actor-Scene Context Relation Modeling

Seok Hwan Lee·Taein Son·Soo Won Seo·Jisong Kim·Jun Won Choi

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Abstract

Video action detection (VAD) is a formidable vision task that involves the localization and classification of actions within the spatial and temporal dimensions of a video clip. Among the myriad VAD architectures, two-stage VAD methods utilize a pre-trained person detector to extract the region of interest features, subsequently employing these features for action detection. However, the performance of two-stage VAD methods has been limited as they depend solely on localized actor features to infer action semantics. In this study, we propose a new two-stage VAD framework called Joint Actor-scene context Relation modeling based on Visual Semantics (JARViS), which effectively consolidates cross-modal action semantics distributed globally across spatial and temporal dimensions using Transformer attention. JARViS employs a person detector to produce densely sampled actor features from a keyframe. Concurrently, it uses a video backbone to create spatio-temporal scene features from a video clip. Finally, the fine-grained interactions between actors and scenes are modeled through a Unified Action-Scene Context Transformer to directly output the final set of actions in parallel. Our experimental results demonstrate that JARViS outperforms existing methods by significant margins and achieves state-of-the-art performance on three popular VAD datasets, including AVA, UCF101-24, and JHMDB51-21.

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Seok Hwan Lee, Taein Son, Soo Won Seo, Jisong Kim, Jun Won Choi. 2024-09-17. JARViS: Detecting Actions in Video Using Unified Actor-Scene Context Relation Modeling. https://arxiv.org/abs/2408.03612

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