Recognition of one class of surfaces from structured point cloud

• Main Authors: Marković Veljko, Jakovljević Živana
• Format: Article
• Language: English
• Published: University of Belgrade - Faculty of Mechanical Engineering, Belgrade 2017-01-01
• Series: FME Transactions
• Subjects: reverse engineering; structured point cloud; direct least squarefitting of ellipses; scanned line fitting; recognition of surfaces
• Online Access: https://scindeks-clanci.ceon.rs/data/pdf/1451-2092/2017/1451-20921704481M.pdf

This paper presents a method for recognition of surfaces represented by elliptical segments in structured three dimensional (3D) point clouds. The method is based on direct least squares fitting of ellipses in scanned lines. By recognizing elliptical segments in both directions of structured cloud it is possible to efficiently allocate G1 (and higher) continuous regions which represent a certain class of surfaces. The proposed method is primarily developed for recognition of elliptical cylinders and ellipsoids, including cylinders and spheres. Depending on scanning mode, the method can be employed for recognition of other second degree surfaces like cones. Besides, as presented in the paper, the method can be utilized for recognition of certain class of higher degree surfaces such as elliptical tori. The proposed method is experimentally verified using several synthesized point clouds as well as using a real world case study.