  Existing Human-Object Interaction (HOI) Detection approaches have achieved
great progress on nonrare classes while rare HOI classes are still not
well-detected. In this paper, we intend to apply human prior knowledge into the
existing work. So we add human-labeled rules to PaStaNet and propose
Rb-PaStaNet aimed at improving rare HOI classes detection. Our results show a
certain improvement of the rare classes, while the non-rare classes and the
overall improvement is more considerable.
