Ziyuan Zhao, Mingxi Xu, Peisheng Qian, Ramanpreet Pahwa, and Richard Chang. Da-cil: Towards domain adaptive class-incremental 3d object detection. In 33rd British Machine Vision Conference 2022, BMVC 2022, London, UK, November 21- 24, 2022. BMVA Press, 2022.
Deep learning has achieved notable success in 3D object detection with the advent of large-scale point cloud datasets. However, severe performance degradation in the past trained classes, i.e., catastrophic forgetting, still remains a critical issue for real-world deployment when the number of classes is unknown or may vary. Moreover, existing 3D class-incremental detection methods are developed for the single-domain scenario, which fail when encountering domain shift caused by different datasets, varying environments, etc. In this paper, we identify the unexplored yet valuable scenario, i.e., class-incremental learning under domain shift, and propose a novel 3D domain adaptive class-incremental object detection framework, DA-CIL, in which we design a novel dual-domain copy-paste augmentation method to construct multiple augmented domains for diversifying training distributions, thereby facilitating gradual domain adaptation. Then, multi-level consistency is explored to facilitate dual-teacher knowledge distillation from different domains for domain adaptive class-incremental learning. Extensive experiments on various datasets demonstrate the effectiveness of the proposed method over baselines in the domain adaptive class-incremental learning scenario.
This research / project is supported by the Agency for Science, Technology and Research (A*STAR) - AI3 HTPO Seed Fund
Grant Reference no. : C211118008