Instrumentation, Techniques, and Measurement

Phase unwrapping for fringe projection three-dimensional measurement with projector defocusing

[+] Author Affiliations
Dongliang Zheng, Feipeng Da

Southeast University, School of Automation, Sipailou 2, Nanjing, Jiangsu 210096, China

Southeast University, Key Laboratory of Measurement and Control of Complex System of Engineering Ministry of Education, Sipailou 2, Nanjing, Jiangsu 210096, China

Heming Huang

Qinghai Normal University, School of Computer Science, 36 Wusixi Street, Xining, Qinghai 810008, China

Opt. Eng. 55(3), 034107 (Mar 31, 2016). doi:10.1117/1.OE.55.3.034107
History: Received August 20, 2015; Accepted February 16, 2016
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Abstract.  For high-speed three-dimensional shape measurement, techniques with projector defocusing have become increasingly important. When the projector is defocused, structured patterns used for phase unwrapping are blurred. These blurred patterns need to be normalized into binary distributions in actual measurement. We propose a method to normalize these blurred structured patterns. The retrieved absolute phase is correct even when the measured objects contain discontinuous parts or contrasting colors.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Dongliang Zheng ; Feipeng Da and Heming Huang
"Phase unwrapping for fringe projection three-dimensional measurement with projector defocusing", Opt. Eng. 55(3), 034107 (Mar 31, 2016). ; http://dx.doi.org/10.1117/1.OE.55.3.034107


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