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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 27, Iss. 5 — May. 1, 2010
  • pp: 1137–1144

Detecting wet surfaces using near infrared lighting

G. McGunnigle  »View Author Affiliations

JOSA A, Vol. 27, Issue 5, pp. 1137-1144 (2010)

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We propose a system to detect wet surfaces using near infrared LED lighting and a conventional CCD camera. There is a sharp fall in the transmission of light through water for wavelengths longer than 920 nm . By detecting this transition it is possible to robustly detect a film of water lying on a surface. This paper considers surfaces that are impermeable, are not hydrophilic, and are sufficiently reflective (reflectivity, ρ > 0.4 ). A system is demonstrated that can detect water on a wide range of surfaces that meet these conditions.

© 2010 Optical Society of America

OCIS Codes
(100.2960) Image processing : Image analysis
(150.0150) Machine vision : Machine vision
(150.2950) Machine vision : Illumination

ToC Category:
Machine Vision

Original Manuscript: December 11, 2009
Revised Manuscript: January 27, 2010
Manuscript Accepted: February 23, 2010
Published: April 27, 2010

G. McGunnigle, "Detecting wet surfaces using near infrared lighting," J. Opt. Soc. Am. A 27, 1137-1144 (2010)

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