In this paper, an ill condition problem which estimate a transmission characteristics under the assumption that only the output characteristics can be observed. In the inverse problem, the physical characteristics of a printing ink (colorant) layer correspond to the transmission characteristics, an illuminant corresponds to the input and the reproduced color corresponds to the output. For a solution of the inverse problem, an adaptive inverse filter for illuminants is employed to remove the characteristics of illuminants. And an inverse solution method to estimate the transmission characteristics is applied after removing the characteristics of an illuminant. Simulation results have shown the efficiency of the method.
Nobuhito Matsushiro, Norihide Miyamura, "Inverse of Transmission Characteristics of Printing Ink Layers by Using an Adaptive Inverse Filter for Illuminants" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP15), 1999, pp 334 - 337, https://doi.org/10.2352/ISSN.2169-4451.1999.15.1.art00087_1