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On-line CAD Reconstruction with Accumulated Means of Local Geometric Properties

  • Reconstruction of hand-held laser scanner data is used in industry primarily for reverse engineering. Traditionally, scanning and reconstruction are separate steps. The operator of the laser scanner has no feedback from the reconstruction results. On-line reconstruction of the CAD geometry allows for such an immediate feedback. We propose a method for on-line segmentation and reconstruction of CAD geometry from a stream of point data based on means that are updated on-line. These means are combined to define complex local geometric properties, e.g., to radii and center points of spherical regions. Using means of local scores, planar, cylindrical, and spherical segments are detected and extended robustly with region growing. For the on-line computation of the means we use so-called accumulated means. They allow for on-line insertion and removal of values and merging of means. Our results show that this approach can be performed on-line and is robust to noise. We demonstrate that our method reconstructs spherical, cylindrical, and planar segments on real scan data containing typical errors caused by hand-held laser scanners.

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Author:Klaus Denker, Bernd Hamann, Georg UmlaufORCiDGND
Parent Title (English):Curves and Surfaces : 8th International Conference, Paris, France, June 12-18, 2014
Place of publication:Cham
Document Type:Conference Proceeding
Year of Publication:2015
Release Date:2018/02/27
First Page:181
Last Page:201
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Open Access?:Nein