Class-imbalanced semi-supervised learning for large-scale point cloud semantic segmentation via decoupling optimization

Mengtian Li, Shaohui Lin, Zihan Wang, Yunhang Shen, Baochang Zhang, Lizhuang Ma

Abstract: Highlights•First to propose decoupling optimization for class-imbalanced 3D point cloud SSL.•Two-round pseudo-labels and focus loss improve head-to-tail class segmentation.•Superior efficiency and effectiveness; achieves new state-of-the-art results.