“Auto-exposure for 3D shape measurement with a digital fringe projection technique

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Ekstrand, Laura
Zhang, Song
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Mechanical Engineering
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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.


This is a conference proceeding from Dimensional Optical Metrology and Inspection for Practical Applications 8133 (2011): 1, doi:10.1117/12.892492. Posted with permission.

Copyright 2011 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

Sat Jan 01 00:00:00 UTC 2011