CVPR2020:点云弱监督三维语义分割的多路径区域挖掘 Multi-Path Region Mining for Weakly Supervised 3D Semantic Segmentation on Point Clouds 论文地址: https://openaccess.thecvf.com/content_CVPR_2020/papers/Wei_Multi-Path_Region_Mining_for_Weakly_Supervised_3D_Semantic_Segmentat