Instrumentation, Techniques, and Measurement

Temporal-spatial encoding binary fringes toward three-dimensional shape measurement without projector nonlinearity

[+] Author Affiliations
Jiangping Zhu, Zhisheng You

Sichuan University, Institute of Image and Graphics, School of Computer Science and Technology, Chengdu 610064, China

Xianyu Su, Yuankun Liu

Sichuan University, Opto-Electronic Department, School of Computer Science and Technology, Chengdu 610064, China

Opt. Eng. 54(5), 054108 (May 27, 2015). doi:10.1117/1.OE.54.5.054108
History: Received April 4, 2015; Accepted May 6, 2015
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Abstract.  Projector nonlinearity is a common problem for digital structured light-based three-dimensional (3-D) shape measurement techniques. A temporal-spatial binary encoding method is presented for the purpose of eluding it. We build a 3-D shape measurement scheme by combining our proposed method with phase measurement profiling. A standard sinusoidal fringe pattern is divided into more than two binary fringe patterns using specially designed temporal and spatial binary encoding rule based on intensity hierarchic quantification, and then are in-focus projected onto the measured object at a time sequence to reconstruct a frame phase-shifting fringe image. On account of the projected binary fringe pattern strictly consisting of zeros and ones, the influence of the projector nonlinearity on the measurement result can be effectively ruled out and simultaneously enables high-quality sinusoidality. In-depth investigations by theoretical analysis and experiments are conducted to demonstrate the performance of this method.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Jiangping Zhu ; Xianyu Su ; Zhisheng You and Yuankun Liu
"Temporal-spatial encoding binary fringes toward three-dimensional shape measurement without projector nonlinearity", Opt. Eng. 54(5), 054108 (May 27, 2015). ; http://dx.doi.org/10.1117/1.OE.54.5.054108


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