Takayuki HASEGAWA, Koichi IINO, Norimichi TSUMURA, Toshiya NAKAGUCHI, YoichiMIYAKE
Graduate School of Advanced Integrated Science, Chiba University, Inage-ku,
Chiba, Japan
The Journal of the institute of image electronics engineer of Japan (Accepted to be published in Vol.38, No.4, pp.365-374, 2009 ).
Abstract
This article addresses a method that predicts colorimetric values of an
object under an arbitrary illuminant from an RGB image photographed by
a digital still camera. When using a 3-band camera, multiple reflectance
spectra that yield different colorimetric values may give the same sensor
responses. This phenomenon implies that a conversion from sensor responses
to accurate colorimetric values is a one-to-many relationship and cannot
be uniquely determined. The proposed method can derive the colorimetric
values with the highest degree of expectation from the given sensor responses
by referring to the statistic feature of reflectance spectra of objects
with the same material as the object to be photographed.
Key words: metamer estimation, object color prediction, digital still camera
Full paper ( reprint )
[PDF] (in Japanese)