Instance Segmentation of Point Clouds via Similarity Learning

It appears your Web browser is not configured to display PDF files. Download adobe Acrobat or click here to download the PDF file.

Click here to download the PDF file.


Mustafa, Mehak




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.


Computer Science
Artificial Intelligence
Engineering - Mining




Carleton University

Thesis Degree Name: 

Master of Computer Science: 

Thesis Degree Level: 


Thesis Degree Discipline: 

Computer Science

Parent Collection: 

Theses and Dissertations

Items in CURVE are protected by copyright, with all rights reserved, unless otherwise indicated. They are made available with permission from the author(s).