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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: Steven A. Burns
  • Vol. 24, Iss. 9 — Sep. 1, 2007
  • pp: 2673–2683

Regularized learning framework in the estimation of reflectance spectra from camera responses

Ville Heikkinen, Tuija Jetsu, Jussi Parkkinen, Markku Hauta-Kasari, Timo Jaaskelainen, and Seong Deok Lee  »View Author Affiliations


JOSA A, Vol. 24, Issue 9, pp. 2673-2683 (2007)
http://dx.doi.org/10.1364/JOSAA.24.002673


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Abstract

For digital cameras, device-dependent pixel values describe the camera’s response to the incoming spectrum of light. We convert device-dependent RGB values to device- and illuminant-independent reflectance spectra. Simple regularization methods with widely used polynomial modeling provide an efficient approach for this conversion. We also introduce a more general framework for spectral estimation: regularized least-squares regression in reproducing kernel Hilbert spaces (RKHS). Obtained results show that the regularization framework provides an efficient approach for enhancing the generalization properties of the models.

© 2007 Optical Society of America

OCIS Codes
(100.3010) Image processing : Image reconstruction techniques
(100.3190) Image processing : Inverse problems
(330.1710) Vision, color, and visual optics : Color, measurement

ToC Category:
Image Processing

History
Original Manuscript: September 20, 2006
Revised Manuscript: March 23, 2007
Manuscript Accepted: April 13, 2007
Published: July 30, 2007

Virtual Issues
Vol. 2, Iss. 10 Virtual Journal for Biomedical Optics

Citation
Ville Heikkinen, Tuija Jetsu, Jussi Parkkinen, Markku Hauta-Kasari, Timo Jaaskelainen, and Seong Deok Lee, "Regularized learning framework in the estimation of reflectance spectra from camera responses," J. Opt. Soc. Am. A 24, 2673-2683 (2007)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-24-9-2673


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