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Proceedings Paper

Evaluation and correction of laser-scanned point clouds
Author(s): Christian Teutsch; Tobias Isenberg; Erik Trostmann; Michael Weber; Dirk Berndt; Thomas Strothotte
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Paper Abstract

The digitalization of real-world objects is of great importance in various application domains. E.g. in industrial processes quality assurance is very important. Geometric properties of workpieces have to be measured. Traditionally, this is done with gauges which is somewhat subjective and time-consuming. We developed a robust optical laser scanner for the digitalization of arbitrary objects, primary, industrial workpieces. As measuring principle we use triangulation with structured lighting and a multi-axis locomotor system. Measurements on the generated data leads to incorrect results if the contained error is too high. Therefore, processes for geometric inspection under non-laboratory conditions are needed that are robust in permanent use and provide high accuracy as well as high operation speed. The many existing methods for polygonal mesh optimization produce very esthetic 3D models but often require user interaction and are limited in processing speed and/or accuracy. Furthermore, operations on optimized meshes consider the entire model and pay only little attention to individual measurements. However, many measurements contribute to parts or single scans with possibly strong differences between neighboring scans being lost during mesh construction. Also, most algorithms consider unsorted point clouds although the scanned data is structured through device properties and measuring principles. We use this underlying structure to achieve high processing speeds and extract intrinsic system parameters and use them for fast pre-processing.

Paper Details

Date Published: 17 January 2005
PDF: 12 pages
Proc. SPIE 5665, Videometrics VIII, 56650I (17 January 2005); doi: 10.1117/12.585450
Show Author Affiliations
Christian Teutsch, Fraunhofer IFF (Germany)
Tobias Isenberg, Univ. of Calgary (Canada)
Erik Trostmann, Fraunhofer IFF (Germany)
Michael Weber, Fraunhofer IFF (Germany)
Dirk Berndt, Fraunhofer IFF (Germany)
Thomas Strothotte, Otto-von-Guericke-Univ. (Germany)

Published in SPIE Proceedings Vol. 5665:
Videometrics VIII
J.-Angelo Beraldin; Sabry F. El-Hakim; Armin Gruen; James S. Walton, Editor(s)

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