Recently there has been an increased activity focused on solving the problems associated with the transmission and display of high quality color image/video signals. The objective is to generate an image or video signal whose quality is as high as possible at the output of a given system. Of specific concern in this research are the characterization and calibration of color output devices, for example printers or electronic displays. In order to make accurate judgments about the images produced, such devices must be calibrated. To do this, a relationship needs to be defined between a set of measured CIE L*a*b* values and a set of control values for the output device. Impacting the solution of this problem are: the model of the output device and its limitations, the type and location of the measurement data, the variability in the data, the interpolation and extrapolation methods used, the variability in the output device under normal operating conditions, and the perceptibility of the errors.