Special Section on Active Electro-Optical Sensing: Phenomenology, Technology, and Applications

Improving the quality of stripes in structured-light three-dimensional profile measurement

[+] Author Affiliations
Zhaoshuai Qi, Zhao Wang, Junhui Huang, Qi Xue, Jianmin Gao

Xi’an Jiaotong University, State Key Laboratory for Manufacturing Systems Engineering, No. 28, Xianning West Road, Xi’an, Shaanxi 710049, China

Opt. Eng. 56(3), 031208 (Oct 25, 2016). doi:10.1117/1.OE.56.3.031208
History: Received July 12, 2016; Accepted October 6, 2016
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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.

© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Zhaoshuai Qi ; Zhao Wang ; Junhui Huang ; Qi Xue and Jianmin Gao
"Improving the quality of stripes in structured-light three-dimensional profile measurement", Opt. Eng. 56(3), 031208 (Oct 25, 2016). ; http://dx.doi.org/10.1117/1.OE.56.3.031208


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