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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 28, Iss. 4 — Apr. 1, 2011
  • pp: 511–516

Correcting cross-media instrument metamerism for reflectance estimation in multispectral imaging

Hui-Liang Shen, Chen-Wei Weng, Hui-Jiang Wan, and John H. Xin  »View Author Affiliations


JOSA A, Vol. 28, Issue 4, pp. 511-516 (2011)
http://dx.doi.org/10.1364/JOSAA.28.000511


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Abstract

In multispectral imaging, the color accuracy of spectral reflectance estimation degrades significantly if the medium of test samples is different from that of calibration samples. This occurs mainly for two reasons, i.e., the different characteristics of spectral reflectances and the different measurement principles between an imaging system and a spectrophotometer. In this paper, this problem is referred to as cross-media instrument metamerism. We propose to correct it by using calibration samples from a standard color chart and a limited number of tuning samples with a target medium as a priori knowledge. The reflectance transform is computed by using both calibration and tuning samples, and the metamerism transform is calculated by modeling the correlation of camera responses between neighboring imaging channels. Experimental results show that the proposed method produces satisfactory spectral and colorimetric accuracy in reflectance estimation. The method could be deployed in practical applications when the available samples of certain media are inadequate for accurate reflectance estimation in a multispectral imaging system.

© 2011 Optical Society of America

OCIS Codes
(330.1710) Vision, color, and visual optics : Color, measurement
(330.1730) Vision, color, and visual optics : Colorimetry
(110.4234) Imaging systems : Multispectral and hyperspectral imaging

ToC Category:
Vision, Color, and Visual Optics

History
Original Manuscript: August 10, 2010
Revised Manuscript: January 11, 2011
Manuscript Accepted: January 16, 2011
Published: March 7, 2011

Virtual Issues
Vol. 6, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Hui-Liang Shen, Chen-Wei Weng, Hui-Jiang Wan, and John H. Xin, "Correcting cross-media instrument metamerism for reflectance estimation in multispectral imaging," J. Opt. Soc. Am. A 28, 511-516 (2011)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-28-4-511

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