Patent ID: 7936479
Filing Date: 2011-05-03
Classification: B41J,H04N

Abstract:
1. An image processing method for printing on a printer an image comprising pixels having an image tone resolution, said printer comprising an array of print nozzles, said nozzles having a nozzle tone resolution, the method comprising: (a) determining a printer profile for correcting the tone response of said array of nozzles; (b) applying said printer profile on the pixels of said image to obtain corrected pixels, said corrected pixels having a correction tone resolution that is higher than said nozzle tone resolution; (c) modifying a corrected pixel to be printed by a nozzle to obtain a modified pixel by adding a fraction of a previously modified pixel to be printed by the same nozzle and by subtracting a fraction of a quantized pixel that was obtained by quantizing said previously modified pixel to said nozzle resolution; and (d) repeating step (c) for a next corrected pixel.