Patent ID: 9213923
Filing Date: 2015-12-15
Classification: G06K,H04N

Abstract:
1. A method for calibrating a printer using a color reflection scanner as a measurement device, comprising; providing a range of operational densities of the printer; receiving a range of operational densities of the color reflection scanner; receiving a calibration target printed using the printer, the calibration target having at least two density levels; receiving an initial lookup table used to print the calibration target; using the color reflection scanner to read the calibration target to obtain scanner output code values from the scanner; using a processor to generate a new lookup table based on the scanner output code values and the initial lookup table; using the processor to calculate a corrected lookup table based on a combination of the initial lookup table and the new lookup table by weighting portions of the new lookup table more heavily for densities that correspond to the range of operational densities of the scanner and weighting portions of the initial lookup table more heavily for densities that correspond to the range of non-operational densities of the scanner; and calibrating the printer using the corrected lookup table.