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Proceedings Paper

Improving 4-D shape measurement by using projector defocusing
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Paper Abstract

This paper presents a real-time 3-D, or 4-D, shape measurement technique that can reach the speed limit of a digital fringe projection system without significantly increasing the system cost. Instead of generating sinusoidal fringe patterns by a computer directly, they are produced by defocusing binary structured patterns. By this means, with a relatively inexpensive camera, the 3-D shape measurement system can double the previously maximum achievable speed, and reaches the refreshing rate of a digital-light-processing (DLP) projector: 120 Hz.

Paper Details

Date Published: 3 August 2010
PDF: 8 pages
Proc. SPIE 7790, Interferometry XV: Techniques and Analysis, 77901A (3 August 2010); doi: 10.1117/12.860181
Show Author Affiliations
Yuanzheng Gong, Iowa State Univ. (United States)
Song Zhang, Iowa State Univ. (United States)


Published in SPIE Proceedings Vol. 7790:
Interferometry XV: Techniques and Analysis
Catherine E. Towers; Joanna Schmit; Katherine Creath, Editor(s)

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