PointGeo: Geometry Transformer for Point Cloud Analysis

ABSTRACT Point cloud processing plays a crucial role in tasks such as point cloud classification, partial segmentation and semantic segmentation. However, existing processing frameworks are constrained by several challenges, such as recognising features in irregular and complex spatial structures, large attention parameter volumes and limitations in generalisation across different scenes. We propose a geometry transformer (PointGeo) method for addressing these concerns through point cloud analysis. This method utilises a geometry transformation network to process point cloud data, effectively capturing both local and global features and enhancing the modelling capability for irregular structures. We extensively test this method on multiple datasets, including ModelNet and ScanObjectNN for point cloud classification tasks, ShapeNet for point cloud partial segmentation tasks and S3DIS and SemanticKITTI for point cloud semantic segmentation tasks. Experimental results show that our approach delivers outstanding performance across all tasks, validating its effectiveness and generalisation capability in handling point cloud data.