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Optical Engineering

Practical 3-D computer vision techniques for full-field surface measurement
Author(s): Y.Y. Hung; L. Lin; B. G. Park
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Paper Abstract

Two practical computer-aided optical techniques for full-field surface shape measurement are presented, one for diffuse surfaces and the other for specularly reflective surfaces. The former technique is based on projecting a computer-generated fringe pattern onto a diffuse surface, and the latter is based on reflecting the fringe pattern from a specularly reflective surface. The fringe pattern is perturbed in accordance with the object surface with the fringe phase bearing information on the depth/slope of the object surface. The computer-generated fringe pattern conveniently enables the fringe phase to be manipulated, and hence the determination of the phase distribution using a phase extraction algorithm. Instead of deriving the mathematical relationship between the fringe phase distribution and the surface depth/slope, this relationship is obtained by calibration. The techniques described can be easily implemented for rapid measurement of 3-D surface shapes in an industrial setting.

Paper Details

Date Published: 1 January 2000
PDF: 7 pages
Opt. Eng. 39(1) doi: 10.1117/1.602345
Published in: Optical Engineering Volume 39, Issue 1
Show Author Affiliations
Y.Y. Hung, Oakland Univ. (United States)
L. Lin, Oakland Univ. (United States)
B. G. Park, Oakland Univ. (United States)

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