“…In general, the process of converting colors from CMY to CIELAB can be defined as characterization (Lee and Lee, 2013), while the contrary process is often called calibration (Yang et al, 2012); obviously the paper mainly interests the latter process. Now the commonly used calibration algorithms are 3D interpolation (Pekkucuksen and Altunbasak, 2013;Liu et al, 2013;Srivastava et al, 2010), polynomial regression (Hong et al, 2001;Nussbaum et al, 2011), neural network (Kang and Anderson, 1992;Hwang et al, 2013), Neugebauer equations (Morovic et al, 2012;Hebert and Hersch Roger, 2011), and so on. Taking into account the quantity of color patches, the precision and computing efficiency of the algorithms, polynomial regression modes is selected in this paper.…”