Removing 3D point cloud occlusion artifacts with generative adversarial networks

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http://urn.fi/URN:NBN:fi:hulib-202003241636
Title: Removing 3D point cloud occlusion artifacts with generative adversarial networks
Author: Väänänen, Pekka
Contributor: University of Helsinki, Faculty of Science
Publisher: Helsingin yliopisto
Date: 2019
Language: eng
URI: http://urn.fi/URN:NBN:fi:hulib-202003241636
http://hdl.handle.net/10138/313581
Thesis level: master's thesis
Discipline: Tietojenkäsittelytiede
Abstract: Real-world locations can be reconstructed as digital 3D models using 3D scanning. The scans often suffer from missing surface regions caused by occlusions and poor scanning geometry, limiting their usefulness for many tasks. We present an automated system that repairs small missing regions using generative adversarial networks (GANs). The system operates on heightmaps of small round surface patches distributed around the missing region. A neural network model predicts a complete plausible surface for each corrupted patch, which is then integrated to the scan. In addition to geometry, surface colors are also generated. Encouraging results are found in the color reconstruction task, but the output geometry is not clearly superior to the results of a simpler baseline spline model.


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