VAST, University of Hong Kong, Tsinghua University, Sun Yat-sen University · 3D Reconstruction

GeoSAM2

GeoSAM2 extends SAM2 for 3D part segmentation by rendering multi-view normal and point maps, accepting 2D prompts (clicks/boxes) to guide interactive part selection, then back-projecting and aggregating masks across views with k-NN voting. Achieves state-of-the-art class-agnostic performance on PartObjaverse-Tiny and PartNetE without requiring text prompts or per-shape optimization.