Video Visual Relation Detection via Multi-modal Feature Fusion

Video visual relation detection is a meaningful research problem, which aims to build a bridge between dynamic vision and language. In this paper, we propose a novel video visual relation detection method with multi-model feature fusion. First, we detect objects on each frame densely with the state-of-the-art video object detection model, flow-guided feature aggregation (FGFA), and generate object trajectories by linking the temporally independent objects with Seq-NMS and KCF tracker. Next, we break the relation candidates, i.e., co-occurrent object trajectory pairs, into short-term segments and predict relations with spatial-temporal feature and language context feature. Finally, we greedily associate the short-term relation segments into complete relation instances. The experiment results show that our proposed method outperforms other methods by a large margin, which also earned us the first place in visual relation detection task of Video Relation Understanding Challenge (VRU), ACMMM 2019.