Applying the Yule-Nielsen equation with negative n.
The theory of halftone printing has attracted the attention of both industry and scientists for decades. The Yule-Nielsen equation has been used for color prediction for more than fifty years now, but apparently the tuning parameter n has been taken to be only larger than or equal to one. Our paper shows that the extension to the whole real axis is well defined in a mathematical sense. We fitted models to data from the ceramics tile printing sector (Rotocolor and Kerajet printing techniques) and found that using a negative n in almost all considered cases resulted in a better fit.
Lewandowski
Achim
A
Austrian Research Institute for Artificial Inteligence, Vienna, Austria. achim.lewandowski@meuniwien.ac.at
Ludl
Marcus
M
Byrne
Gerald
G
Dorffner
Georg
G