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Optical Engineering

Temporal-spatial encoding binary fringes toward three-dimensional shape measurement without projector nonlinearity
Author(s): Jiangping Zhu; Xianyu Su; Zhisheng You; Yuankun Liu
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Paper 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.

Paper Details

Date Published: 27 May 2015
PDF: 10 pages
Opt. Eng. 54(5) 054108 doi: 10.1117/1.OE.54.5.054108
Published in: Optical Engineering Volume 54, Issue 5
Show Author Affiliations
Jiangping Zhu, Sichuan Univ. (China)
Xianyu Su, Sichuan Univ. (China)
Zhisheng You, Sichuan Univ. (China)
Yuankun Liu, Sichuan Univ. (China)

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