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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 28 — Oct. 1, 2007
  • pp: 7068–7082

Maximum a posteriori estimation of spectral reflectance from color image and multipoint spectral measurements

Yuri Murakami, Kunihiko Ietomi, Masahiro Yamaguchi, and Nagaaki Ohyama  »View Author Affiliations

Applied Optics, Vol. 46, Issue 28, pp. 7068-7082 (2007)

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Accurate color image reproduction under arbitrary illumination can be realized if the spectral reflectance functions in a scene are obtained. Although multispectral imaging is one of the promising methods to obtain the reflectance of a scene, it is expected to reduce the number of color channels without significant loss of accuracy. This paper presents what we believe to be a new method for estimating spectral reflectance functions from color image and multipoint spectral measurements based on maximum a posteriori (MAP) estimation. Multipoint spectral measurements are utilized as auxiliary information to improve the accuracy of spectral reflectance estimated from image data. Through simulations, it is confirmed that the proposed method improves the estimation accuracy, particularly when a scene includes subjects that belong to various categories.

© 2007 Optical Society of America

OCIS Codes
(100.3010) Image processing : Image reconstruction techniques
(100.3190) Image processing : Inverse problems
(110.2990) Imaging systems : Image formation theory
(300.6550) Spectroscopy : Spectroscopy, visible

ToC Category:
Image Processing

Original Manuscript: April 16, 2007
Revised Manuscript: July 23, 2007
Manuscript Accepted: July 24, 2007
Published: September 28, 2007

Yuri Murakami, Kunihiko Ietomi, Masahiro Yamaguchi, and Nagaaki Ohyama, "Maximum a posteriori estimation of spectral reflectance from color image and multipoint spectral measurements," Appl. Opt. 46, 7068-7082 (2007)

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