Estimation of Spectral Reflectance From Densitometric Mea-surements Using Printing Model Prior

摘要

Estimating the spectral reflectance of a printed patch is an important task in the printing industry for several pur-poses such as ICC profiling and maintaining color consistency. However, equipment for accurate spectral reflectance estima-tion (spectrophotometers) is expensive. In this work we sug-gest to use known characterization of the printer output in order to achieve accurate estimation of spectral reflectance from only three-channel measurement, such as provided by the standard status T densitometers. The mean estimation error we achieve on known substrates is 0.13ΔE. Further results indicate an estimation error below IΔE for a set of unknown substrates.