Autoexposure for three-dimensional shape measurement using a digital-light-processing projector

Laura Ekstrand; Song Zhang

doi:10.1117/1.3662387

1 December 2011 Autoexposure for three-dimensional shape measurement using a digital-light-processing projector

Laura Ekstrand, Song Zhang

Author Affiliations +

Optical Engineering, Vol. 50, Issue 12, 123603 (December 2011). https://doi.org/10.1117/1.3662387

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. We study the generation of sinusoidal fringe patterns by properly defocusing binary ones, which permits the use of an arbitrary exposure time. This provides the potential to adapt the exposure time automatically. We present the principle of an automatic exposure technique and show some experimental results.

©(2011) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Laura Ekstrand and Song Zhang "Autoexposure for three-dimensional shape measurement using a digital-light-processing projector," Optical Engineering 50(12), 123603 (1 December 2011). https://doi.org/10.1117/1.3662387

Published: 1 December 2011

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