US 11,914,319 B1
Printer providing in-track error correction incorporating anti-aliasing at cross-track positions
Chung-Hui Kuo, Fairport, NY (US)
Assigned to EASTMAN KODAK COMPANY, Rochester, NY (US)
Filed by Eastman Kodak Company, Rochester, NY (US)
Filed on Aug. 10, 2022, as Appl. No. 17/884,676.
Int. Cl. G03G 15/00 (2006.01); G03G 15/04 (2006.01)
CPC G03G 15/5062 (2013.01) [G03G 15/04054 (2013.01); G03G 2215/047 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A digital printing system incorporating in-track position corrections, comprising:
one or more printing subsystems, each printing subsystem including a linear printhead extending in a cross-track direction including an array of light sources for exposing a photosensitive medium;
a data processing system; and
a digital memory for storing a representation of an in-track position correction function, wherein the in-track position correction function is a non-linear function that specifies in-track position corrections to be applied as a function of cross-track position, the in-track position corrections being quantized to integer in-track position corrections, and wherein the representation of the in-track position correction function includes the cross-track positions and transition direction of transitions in the in-track position correction function;
wherein the digital printing system is adapted to print digital images using a printing process that includes:
a) receiving digital image data for a digital image to be printed by the digital imaging system, wherein the digital image includes a plurality of image lines extending in the cross-track direction, each image line being defined by an array of image pixels having pixel values;
b) using the data processing system to determine corrected image lines by resampling the digital image data responsive to the stored representation of the in-track position correction function; and
c) using the data processing system to modify the corrected image lines to provide anti-aliasing pixels at cross-track positions adjacent to the transitions in the in-track position correction function.