GroupRF: Panoptic Scene Graph Generation with group relation tokens

Panoptic Scene Graph Generation (PSG) aims to predict a variety of relations between pairs of objects within an image, and indicate the objects by panoptic segmentation masks instead of bounding boxes. Existing PSG methods attempt to straightforwardly fuse the object tokens for relation prediction, thus failing to fully utilize the interaction between the pairwise objects. To address this problem, we propose a novel framework named Group RelationFormer (GroupRF) to capture the fine-grained inter-dependency among all instances. Our method introduce a set of learnable tokens termed group rln tokens, which exploit fine-grained contextual interaction between object tokens with multiple attentive relations. In the process of relation prediction, we adopt multiple triplets to take advantage of the fine-grained interaction included in group rln tokens. We conduct comprehensive experiments on OpenPSG dataset, which show that our method outperforms the previous state-of-the-art method. Furthermore, we also show the effectiveness of our framework by ablation studies. Our code is available at https://github.com/WHY-student/GroupRF.