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A Multilinear Constraint on Dichromatic Planes for Illumination Estimation

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2 Author(s)
Toro, J. ; Los Andes Univ., Merida ; Funt, B.

A new multilinear constraint on the color of the scene illuminant based on the dichromatic reflection model is proposed. The formulation avoids the problem, common to previous dichromatic methods, of having to first identify pixels corresponding to the same surface material. Once pixels from two or more materials have been identified, their corresponding dichromatic planes can be intersected to yield the illuminant color. However, it is not always easy to determine which pixels from an arbitrary region of an image belong to which dichromatic plane. The image region may cover an area of the scene encompassing several different materials and, hence, pixels from several different dichromatic planes. The new multilinear constraint accounts for this multiplicity of materials and provides a mechanism for choosing the most plausible illuminant from a finite set of candidate illuminants. The performance of this new method is tested on a database of real images

Published in:

Image Processing, IEEE Transactions on  (Volume:16 ,  Issue: 1 )

Date of Publication:

Jan. 2007

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