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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 16, Iss. 10 — Oct. 1, 1999
  • pp: 2352–2362

Spectral vision system for measuring color images

Markku Hauta-Kasari, Kanae Miyazawa, Satoru Toyooka, and Jussi Parkkinen  »View Author Affiliations

JOSA A, Vol. 16, Issue 10, pp. 2352-2362 (1999)

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We present a spectral vision system that can be used to measure a color spectrum and two-dimensional spectral images. First, a low-dimensional color filter set was designed by an unsupervised neural network. Then a compact optical setup for the spectral synthesizer was constructed to synthesize the light that corresponds to the spectral characteristics of the color filter. In the optical setup a liquid-crystal spatial light modulator was used to implement color filters. A sample was illuminated by the synthesized lights, and the intensity images that correspond to the inner products between the color filter and the sample were detected by a CCD camera. From the detected inner products the sample’s color spectra were reconstructed by use of a pseudoinverse matrix. Experimental results of measuring a single color spectrum and spectral images are presented.

© 1999 Optical Society of America

OCIS Codes
(300.6170) Spectroscopy : Spectra
(330.0330) Vision, color, and visual optics : Vision, color, and visual optics
(330.1710) Vision, color, and visual optics : Color, measurement
(330.1720) Vision, color, and visual optics : Color vision
(330.6180) Vision, color, and visual optics : Spectral discrimination

Original Manuscript: October 16, 1998
Revised Manuscript: March 19, 1999
Manuscript Accepted: March 19, 1999
Published: October 1, 1999

Markku Hauta-Kasari, Kanae Miyazawa, Satoru Toyooka, and Jussi Parkkinen, "Spectral vision system for measuring color images," J. Opt. Soc. Am. A 16, 2352-2362 (1999)

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