1. A method for characterizing a digital image input terminal for color measurement of printed hardcopy, comprising the steps of: printing, for each of a plurality of levels of K, a target comprising a grid of patches having varying levels of C, M, and Y; measuring the colors of patches in said grid of patches in a first color space; scanning the grid of patches on the digital image input terminal to generate a representation of the patches in an input device dependent color space; and deriving, for each of a plurality of levels of K, a characterization transform mapping the scanned device dependent color space values to the first color space.