3DSymm: Robust and Accurate 3D Reflection Symmetry Detection. (November 2020)

• Record Type: Journal Article
• Authors: Nagar, Rajendra; Raman, Shanmuganathan
• Is Part Of: Pattern recognition. Volume 107(2020:Nov.)
• Publication Date: 2020-11
• Subjects: Reflection symmetry -- Point cloud -- Optimization; Pattern perception -- Periodicals; Perception des structures -- Périodiques; Patroonherkenning; 006.4
• DOI: 10.1016/j.patcog.2020.107483
• Languages: English
• ISSNs: 0031-3203

Abstract

Highlights: We find reflection symmetry in 3D point clouds using an optimization technique. Robust to outliers, perturbation from the perfect symmetry, and missing parts. Empirically show that the proposed optimization problem is non-convex. A fast descriptor-free randomized algorithm to initialize the symmetry plane. A closed-form solution for the global 3D reflection symmetry plane. Abstract: Reflection symmetry is a very commonly occurring feature in both natural and man-made objects, which helps in understanding objects better and makes them visually pleasing. Detection of reflection symmetry is a fundamental problem in the field of computer vision and computer graphics which aids in understanding and representing reflective symmetric objects. In this work, we attempt the problem of detecting the 3D global reflection symmetry of a 3D object represented as a point cloud. The main challenge is to handle outliers, missing parts, and perturbations from the perfect reflection symmetry. We propose a descriptor-free approach, in which, we pose the problem of reflection symmetry detection as an optimization problem and provide a closed-form solution. We show that the proposed method achieves state-of-the-art performance on the standard dataset.