Illumination Estimation via Thin-Plate Spline Interpolation
Xiong, W., Shi, L., Funt, B., Kim, S., Kang, B., and Lee, S.D., "Illumination Estimation via Thin-Plate Spline Interpolation," Proc. of
the Fifteenth IS&T Color Imaging Conference, Albuquerque, Nov. 2007.
Thin-plate spline interpolation is used to interpolate the
color of the incident scene illumination from an image of the
scene. The algorithm can be used to provide color constancy
under changing illumination conditions, and automatic white
balancing for digital cameras. Thin-plate splines interpolate
over a non-uniformly sampled input space, which in this case is
a set of training images and associated illumination
chromaticities. Tests of the thin-plate spline method on a large
set of real images demonstrate that the method estimates the
color of the incident illumination quite accurately.
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