Prediction of the reflection spectra of three ink colour prints

We have developed a colour prediction model and an ink-spreading model. The, present study aims at confirming the validity of both models for the case of ink-jet prints using cyan, magenta and yellow inks. Our colour prediction model, augmented by the ink-jet spreading model, predicts accurately the reflection spectra of halftoned samples printed on an HP printer and on an Epson printer. For each printer, the reflection spectra-of 125 samples uniformly distributed in the CMY colour cube were computed. The average prediction error, between measured and predicted spectra is about DeltaE = 2.5. in CIELAB. The model requires the estimation of A set of parameters which are deduced from a small set of measured samples. Such a model simplifies the calibration of ink-jet printers, as well as their recalibrations when ink or paper is changed.