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

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 wit...

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Published inApplied optics (2004) Vol. 46; no. 28; p. 7068
Main Authors Murakami, Yuri, Ietomi, Kunihiko, Yamaguchi, Masahiro, Ohyama, Nagaaki
Format Journal Article
LanguageEnglish
Published United States 01.10.2007
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ISSN1559-128X
DOI10.1364/ao.46.007068

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Abstract 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.
AbstractList 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.
Author Yamaguchi, Masahiro
Ietomi, Kunihiko
Murakami, Yuri
Ohyama, Nagaaki
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  givenname: Kunihiko
  surname: Ietomi
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  fullname: Yamaguchi, Masahiro
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  givenname: Nagaaki
  surname: Ohyama
  fullname: Ohyama, Nagaaki
BackLink https://www.ncbi.nlm.nih.gov/pubmed/17906738$$D View this record in MEDLINE/PubMed
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Snippet Accurate color image reproduction under arbitrary illumination can be realized if the spectral reflectance functions in a scene are obtained. Although...
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