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- W3014878043 abstract "Instance segmentation is an important task for scene understanding. Compared to the fully-developed 2D, 3D instance segmentation for point clouds have much room to improve. In this paper, we present PointGroup, a new end-to-end bottom-up architecture, specifically focused on better grouping the points by exploring the void space between objects. We design a two-branch network to extract point features and predict semantic labels and offsets, for shifting each point towards its respective instance centroid. A clustering component is followed to utilize both the original and offset-shifted point coordinate sets, taking advantage of their complementary strength. Further, we formulate the ScoreNet to evaluate the candidate instances, followed by the Non-Maximum Suppression (NMS) to remove duplicates. We conduct extensive experiments on two challenging datasets, ScanNet v2 and S3DIS, on which our method achieves the highest performance, 63.6% and 64.0%, compared to 54.9% and 54.4% achieved by former best solutions in terms of mAP with IoU threshold 0.5." @default.
- W3014878043 created "2020-04-10" @default.
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- W3014878043 date "2020-04-03" @default.
- W3014878043 modified "2023-09-24" @default.
- W3014878043 title "PointGroup: Dual-Set Point Grouping for 3D Instance Segmentation" @default.
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- W3014878043 doi "https://doi.org/10.48550/arxiv.2004.01658" @default.
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