Instrumentation, Measurement, and Metrology

High-resolution, real-time three-dimensional shape measurement

[+] Author Affiliations
Song Zhang

Harvard University, Department of Mathematics, Cambridge, Massachusetts 02138

Peisen S. Huang

State University of New York at Stony Brook, Department of Mechanical Engineering, Stony Brook, New York 11794

Opt. Eng. 45(12), 123601 (December 13, 2006). doi:10.1117/1.2402128
History: Received February 16, 2006; Accepted May 11, 2006; Published December 13, 2006
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We describe a high-resolution, real-time 3-D shape measurement system based on a digital fringe projection and phase-shifting technique. It utilizes a single-chip digital light processing projector to project computer-generated fringe patterns onto the object, and a high-speed CCD camera synchronized with the projector to acquire the fringe images at a frame rate of 120framess. A color CCD camera is also used to capture images for texture mapping. Based on a three-step phase-shifting technique, each frame of the 3-D shape is reconstructed using three consecutive fringe images. Therefore the 3-D data acquisition speed of the system is 40framess. With this system, together with the fast three-step phase-shifting algorithm and parallel processing software we developed, high-resolution, real-time 3-D shape measurement is realized at a frame rate of up to 40framess and a resolution of 532×500 points per frame.

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© 2006 Society of Photo-Optical Instrumentation Engineers

Citation

Song Zhang and Peisen S. Huang
"High-resolution, real-time three-dimensional shape measurement", Opt. Eng. 45(12), 123601 (December 13, 2006). ; http://dx.doi.org/10.1117/1.2402128


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