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Proceedings Paper

Digital filters for surface shape recovery from phase-modulated structured light
Author(s): K. C. Yow; Clifford Allan Hobson; Jeremy David Pearson
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Paper Abstract

A rarely used fringe demodulation method which uses similar technique to phase demodulation in satellite communications is demonstrated in this paper. The processing is done in the space domain utilizing zero phase digital filters. In this paper, a recursive pole-zero placement digital filter design method has been employed, and the filters have been applied to both 1-D simulated signals and real 2-D images. The results are explained and suggestions to further improve either the quality or speed of the method are also presented. Two methods of producing zero-phase digital filters are explained which is important in preserving the integrity of an image. Theoretical derivation and detailed analysis of the demodulation method and filter design are presented. Images are included as to give a better understanding of the approach. Finally, comments, improvements and comparisons of the method are included.

Paper Details

Date Published: 20 March 1997
PDF: 6 pages
Proc. SPIE 2921, International Conference on Experimental Mechanics: Advances and Applications, (20 March 1997); doi: 10.1117/12.269834
Show Author Affiliations
K. C. Yow, Liverpool John Moores Univ. (United Kingdom)
Clifford Allan Hobson, Liverpool John Moores Univ. (United Kingdom)
Jeremy David Pearson, Liverpool John Moores Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 2921:
International Conference on Experimental Mechanics: Advances and Applications
Fook Siong Chau; C. T. Lim, Editor(s)

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