Device characterization typically involves generating one or more targets each comprising a number of color patches and making colorimetric measurements of these patches. In order to derive the characterization function, one has to obtain the correspondence between the set of colorimetric measurements and a set of device signals. In the case of output device characterization, the device signals are the CMY(K) values used to create the target; for input device characterization the device signals are the captured RGB values. Establishing the correspondence requires knowledge of the spatial target layout, the order in which the measurement instrument measures the patches, and the order in which the input or output device captures or renders respectively the target patches. Since the measurement process requires hum...