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Proceedings Paper

Generation And Use Of Color Pseudo Random Sequences For Coding Structured Light In Active Ranging
Author(s): Heinz Hugli; Gilbert Maitre
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Paper Abstract

When using structured light for the measurement of three dimensional objects, the observed stripes of light must be indexed, that is, the correspondance between projected light stripes and the observed stripes must be established. Basically, time, spatial and color coding can be used to characterize the light stripes. In this study, we use color coding and generate the projected light stripes as a sequence of colors showing subsequences of length N which are all different and thus can be indexed by analysis of the observed stripe sequence. The sequence generation used follows the methods known for generating pseudo random sequences. We present also several indexing rules and analyse their behaviour in a measurement setup exhibiting stripe deletions and permutations. A parametric method is proposed which can accomodate scenes with different object coarseness.

Paper Details

Date Published: 15 February 1989
PDF: 8 pages
Proc. SPIE 1010, Industrial Inspection, (15 February 1989); doi: 10.1117/12.949215
Show Author Affiliations
Heinz Hugli, University of Neuchatel (Switzerland)
Gilbert Maitre, University of Neuchatel (Switzerland)

Published in SPIE Proceedings Vol. 1010:
Industrial Inspection
Donald W. Braggins, Editor(s)

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