Inversion of the Neugebauer equations

✍ Scribed by Marc Mahy; Paul Delabastita

• Book ID: 102660356
• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 651 KB
• Volume: 21
• Category: Article
• ISSN: 0361-2317
• DOI: 10.1002/(sici)1520-6378(199612)21:6<404::aid-col3>3.0.co;2-#

✦ Synopsis

Inversion of the Neugebauer Equations

The Neugebauer equations are considered as the basic physical model for printing systems and, hence, they have often been used either in their original form or in any adapted version to model color printers. The main problern with printer models is that they relate color as a function of colorant values. In practice, however, the inverse relation is needed and, hence, the printer model needs to he inverted. This is done by making use of iterative techniques and, as a result, only one colorant combination will he obtained to achieve a given color. However, in this publication it is shown that, in the case of the Neugchauer model.for three colorants, there are up to six solutions with which a given color can be reached. Between these solutions there may be a number of pairs that are complex conjugated. Mathematical formulas to Jind all these solutions are given. The extension of this inversion technique for more than three inks and for the localized Netigebauer equations is presented.