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Optical Engineering • Open Access

Nonlinearity calibrating algorithm for structured light illumination
Author(s): Kai Liu; Shuaijun Wang; Daniel L. Lau; Kenneth E. Barner; Fouad E. Kiamilev

Paper Abstract

In structured light illumination (SLI), the nonlinear distortion of the optical devices dramatically ruins accuracy of three-dimensional reconstruction when using only a small number of projected patterns. We propose a universal algorithm to calibrate these device nonlinearities to accurately precompensate the patterns. Thus, no postprocessing is needed to correct for the distortions while the number of patterns can be reduced down to as few as possible. Theoretically, the proposed method can be applied to any SLI pattern strategy. Using a three-pattern SLI method, our experimental results will show a 25× to 60× reduction in surface variance for a flat target, depending upon any surface smoothing that might be applied to remove Gaussian noise.

Paper Details

Date Published: 7 May 2014
PDF: 3 pages
Opt. Eng. 53(5) 050501 doi: 10.1117/1.OE.53.5.050501
Published in: Optical Engineering Volume 53, Issue 5
Show Author Affiliations
Kai Liu, Sichuan Univ. (China)
Shuaijun Wang, Sichuan Univ. (China)
Daniel L. Lau, Univ. of Kentucky (United States)
Kenneth E. Barner, Univ. of Delaware (United States)
Fouad E. Kiamilev, Univ. of Delaware (United States)

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