Patent ID: 7315394
Filing Date: 2008-01-01
Classification: H04N

Abstract:
1. A method comprising: forming a plurality of test patches in an array of horizontal rows and vertical columns using an imaging machine, each of said test patches being associated with a respective one of a plurality of initial input color values, said test patches including a plurality of varied-input test patches and at least one group of first equivalent-input test patches; measuring a respective output color value of each of the test patches; generating at least one first mathematical relationship based on the output color values of the at least one group of first equivalent-input test patches; calculating a plurality of modeled input color values, each of the modeled input color values being calculated based upon the first mathematical relationship and the measured output color value of a corresponding one of the first equivalent-input test patches; calculating a plurality of adjusted input color values for respective ones of the varied-input test patches, each said adjusted input color value being calculated based upon said generated at least one first mathematical relationship, said initial input color value associated with the respective varied-input test patch, said modeled input color value corresponding to one of the first equivalent-input test patches that is in a same said row as the respective varied-input test patch, and the initial input color value associated with the one first equivalent-input test patch that is in a same said row as the respective varied-input test patch; computing a second mathematical relationship between the adjusted input color values and the output color values; and calibrating the imaging machine by using the second mathematical relationship.