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Optical Engineering

Improving the quality of stripes in structured-light three-dimensional profile measurement
Author(s): Zhaoshuai Qi; Zhao Wang; Junhui Huang; Qi Xue; Jianmin Gao
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Paper Abstract

Measuring objects with high dynamic range (HDR) reflectivity by coded structured-light, captured stripes are usually seriously distorted by reflectivity, causing inaccurate measurement results. A stripe enhancement method is proposed to deal with the problem. The method is based on the correspondence between phase and intensity of the stripe. First, the phase map of the captured stripe pattern is retrieved by phase-shift algorithm and multiexposure method, where saturation and low contrast of the stripe are eliminated; then, the modulation of stripes is normalized to eliminate the influence of reflectivity; finally, the enhanced stripe is obtained by assembling the modulation and the phase map. Experimental results demonstrate that the method is efficient for objects with HDR reflectivity and achieves high accuracy.

Paper Details

Date Published: 25 October 2016
PDF: 9 pages
Opt. Eng. 56(3) 031208 doi: 10.1117/1.OE.56.3.031208
Published in: Optical Engineering Volume 56, Issue 3
Show Author Affiliations
Zhaoshuai Qi, Xi'an Jiaotong Univ. (China)
Zhao Wang, Xi'an Jiaotong Univ. (China)
Junhui Huang, Xi'an Jiaotong Univ. (China)
Qi Xue, Xi'an Jiaotong Univ. (China)
Jianmin Gao, Xi'an Jiaotong Univ. (China)

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