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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 23 — Nov. 12, 2007
  • pp: 15093–15100

Chromatic discrimination by use of computer controlled set of light-emitting diodes

Alexei A. Kamshilin and Ervin Nippolainen  »View Author Affiliations

Optics Express, Vol. 15, Issue 23, pp. 15093-15100 (2007)

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We propose a novel approach for measurements of two-dimensional distribution of the reflection spectra with high spatial resolution. It is based on a subspace vector model of surface reflections and includes sequential illumination of the object by basis functions preliminary calculated with principal component analysis. A simple optical system consisting of a computer controlled set of light-emitting diodes and a photo-receiver operating in integration regime is used to acquire spatial distribution of reflection spectra in compressed form. The compressed data can be directly used for accurate color classification or recognition. The system’s ability to distinguish metameric samples with extremely small hue difference is experimentally demonstrated.

© 2007 Optical Society of America

OCIS Codes
(100.5010) Image processing : Pattern recognition
(330.1710) Vision, color, and visual optics : Color, measurement
(330.6180) Vision, color, and visual optics : Spectral discrimination

ToC Category:
Vision, Color, and Visual Optics

Original Manuscript: July 16, 2007
Revised Manuscript: October 16, 2007
Manuscript Accepted: October 22, 2007
Published: October 31, 2007

Virtual Issues
Vol. 2, Iss. 12 Virtual Journal for Biomedical Optics

Alexei A. Kamshilin and Ervin Nippolainen, "Chromatic discrimination by use of computer controlled set of light-emitting diodes," Opt. Express 15, 15093-15100 (2007)

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