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Ana Stanescu, Philipp Fleck, Dieter Schmalstieg, and Clemens Arth. Semantic segmentation of geometric primitives in dense 3d point clouds. In Adjunct Proceedings of the IEEE International Symposium for Mixed and Augmented Reality 2018 (To appear). 2018.


This paper presents an approach to semantic segmentation and structural modeling from dense 3D point clouds. The core contribution is an efficient method for fitting of geometric primitives based on machine learning. First, the dense 3D point cloud is acquired together with RGB images on a mobile handheld device. Then, RANSAC is used to estimate the presence of geometric primitives, followed by an evaluation of their fit based on classification of the fitting parameters. Finally, the approach iterates over successive frames to optimize the fitting parameters or replace a detected primitive by a better fitting one. As a result, we obtain a semantic model of the scene consisting of a set of geometric primitives. We evaluate the approach on an extensive set of scenarios and show its plausibility in augmented reality applications.