Patent ID: 7643678
Filing Date: 2010-01-05
Classification: B41J,G06K

Abstract:
1. A method comprising: selecting N halftone bricks for printing N desired area coverages wherein each of the N halftone bricks comprises I lines and selecting M scan lines wherein I, M, and N are integers greater than one, such that the combination of said positive integers for I, M, and N do not result in a situation where the said N desired area are not repeated and where the said M scan lines are not repeated; selecting at least four different combinations of at least two of the N desired area coverages and at least two of the M scan lines and printing at least four cross process swaths corresponding to the at least four of the four different combinations; printing at least two nominal cross process swaths corresponding to the at least two of the N desired area coverages; measuring the at least four cross process swaths and the at least two nominal cross process swaths to determine a sensitivity matrix; measuring the printed density of the at least two nominal cross process swaths to determine at least two print density nonuniformities; and determining at least two correction profiles from the sensitivity matrix and the at least two print density nonuniformities.