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Proceedings Paper

Auto-exposure for 3D shape measurement using a DLP projector
Author(s): Laura Ekstrand; Song Zhang
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Paper Abstract

Automatically adapting the camera exposure time is crucial for industrial applications where minimum human intervention is usually desirable. However, it is very challenging to realize such a capability for a conventional fringe projection system where only a finite increment of the exposure time is allowed due to its digital fringe generation nature. Our recent study on generating sinusoidal fringe patterns by properly defocusing binary ones permits the use of an arbitrary exposure time. This provides the potential to adapt the exposure time automatically. This paper will present the principle of an automatic exposure technique and show some experimental results.

Paper Details

Date Published: 10 September 2011
PDF: 8 pages
Proc. SPIE 8133, Dimensional Optical Metrology and Inspection for Practical Applications, 813305 (10 September 2011); doi: 10.1117/12.892492
Show Author Affiliations
Laura Ekstrand, Iowa State Univ. (United States)
Song Zhang, Iowa State Univ. (United States)

Published in SPIE Proceedings Vol. 8133:
Dimensional Optical Metrology and Inspection for Practical Applications
Kevin G. Harding; Peisen S. Huang; Toru Yoshizawa, Editor(s)

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