Instance Segmentation of Point Clouds via Similarity Learning
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We introduce a novel approach for instance segmentation of point clouds using a form of similarity learning. Specifically, our neural network, called PointSimNet, based on PointNet, learns to predict point features that are close to each other in feature space if the points belong to the same semantic category. A similarity matrix is used to find the optimal number of clusters using the eigengap heuristic. Spectral clustering is then performed on the similarity matrix to obtain the final set of instances. We also provide an optional step of constrained clustering where the user can guide the clustering to refine the segmentation results. We show that our instance segmentation method outperforms SGPN by an average precision of 20% points according to a measure without requiring any instance information in the training set. We also demonstrate that the user can improve the accuracy of results by adding a small number of constraints.
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Copyright © 2020 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
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- 2020
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mustafa-instancesegmentationofpointcloudsviasimilarity.pdf | 2023-05-05 | Public | Download |