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Segment 3D scene with only class existence tags by using scene primitives with Densify Your Labels

Segment 3D scene with only class existence tags by using scene primitives with Densify Your Labels


Densify Your Labels: Unsupervised Clustering with Bipartite Matching for Weakly Supervised Point Cloud Segmentation



... propose a weakly supervised semantic segmentation method for point clouds that predicts "per-point" labels from just "whole-scene" annotations while achieving the performance of recent fully supervised approaches.


... core idea is to propagate the scene-level labels to each point in the point cloud by creating pseudo labels in a conservative way.


... over-segment point cloud features via unsupervised clustering and associate scene-level labels with clusters through bipartite matching, thus propagating scene labels only to the most relevant clusters, leaving the rest to be guided solely via unsupervised clustering.


... empirically demonstrate that over-segmentation and bipartite assignment plays a crucial role.


... method ... outperforming state of the art, and demonstrate ... can achieve results comparable to fully supervised methods.



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