title: Pre-processing of point-data from contact and optical 3D digitization sensors.
abstract: Contemporary 3D digitization systems employed by reverse engineering (RE) feature ever-growing scanning speeds with the ability to generate large quantity of points in a unit of time. Although advantageous for the quality and efficiency of RE modelling, the huge number of point datas can turn into a serious practical problem, later on, when the CAD model is generated. In addition, 3D digitization processes are very often plagued by measuring errors, which can be attributed to the very nature of measuring systems, various characteristics of the digitized objects and subjective errors by the operator, which also contribute to problems in the CAD model generation process. This paper presents an integral system for the pre-processing of point data, i.e., filtering, smoothing and reduction, based on a cross-sectional RE approach. In the course of the proposed system development, major emphasis was placed on the module for point data reduction, which was designed according to a novel approach with integrated deviation analysis and fuzzy logic reasoning. The developed system was verified through its application on three case studies, on point data from objects of versatile geometries obtained by contact and laser 3D digitization systems. The obtained results demonstrate the effectiveness of the system.
authors.affiliation: Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovica 6, 21000 Novi Sad, Serbia. budaki@uns.ac.rs
authors.forename: Igor
authors.initials: I
authors.lastname: Budak
authors.forename: Djordje
authors.initials: D
authors.lastname: Vukelić
authors.forename: Drago
authors.initials: D
authors.lastname: Bračun
authors.forename: Janko
authors.initials: J
authors.lastname: Hodolič
authors.forename: Mirko
authors.initials: M
authors.lastname: Soković
mesh_terms: D000465:Algorithms; D017143:Fuzzy Logic; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000295:instrumentation*; D007909:Lenses; D008962:Models, Theoretical; D055096:Optical Devices; D015203:Reproducibility of Results; D013177:Sports