Superfast phase-shifting method for 3-D shape measurement
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Updated: Jun 11, 2026
High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
Published on: December 3, 2013
Song Zhang1, Daniel Van Der Weide, James Oliver
1Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA. song@iastate.edu
Abstract:
Recently introduced DLP Discovery technology allows for tens of kHz binary image switching, which has great potential for superfast 3-D shape measurement. This paper presents a system that realizes 3-D shape measurement by using a DLP Discovery technology to switch binary structured patterns at very high frame rates. The sinusoidal fringe patterns are generated by properly defocusing the projector. Combining this approach with a phase-shifting method, we achieve an unprecedented rate for 3-D shape measurement: 667 Hz. This technology can be applied to numerous applications including medical science, biometrics, and entertainment.
