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Unsupervised 3D point cloud segmentation using multicut graph algorithm on features with FreePoint

Unsupervised 3D point cloud segmentation using multicut graph algorithm on features with FreePoint


FreePoint: Unsupervised Point Cloud Instance Segmentation

arXiv paper abstract https://arxiv.org/abs/2305.06973



Instance segmentation of point clouds is a crucial task in 3D field ... However ... requires a large number of manual annotations


... propose a method, called FreePoint, for underexplored unsupervised class-agnostic instance segmentation on point clouds.


... represent the point features by combining coordinates, colors, normals, and self-supervised deep features.


Based on the point features, ... perform a multicut algorithm to segment point clouds into coarse instance masks as pseudo labels, which are used to train a point cloud instance segmentation model.


... propose a weakly-supervised training strategy and corresponding loss.


... For class-agnostic instance segmentation on point clouds, FreePoint largely fills the gap with its fully-supervised counterpart based on the state-of-the-art instance segmentation model Mask3D and even surpasses some previous fully-supervised methods ...



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