Patent ID: 9734440
Date: 2017-08-15
CPC Classifications: G06K,H04N

Claim:
1. A method of generating a screened multi-bit data output file for a digital printing machine having first and second nozzles that each can print on a page a first printable tone level, a second printable tone level, and a third printable tone level, from an unscreened raster data file specifying a continuous tone value for a first colorant for each printable position of the page, the method comprising the steps of: (a) creating a first printer profile comprising density measurements for the first colorant from the first nozzle; (b) creating a first set of tonal sub-ranges based upon said first printer profile of the first nozzle; said first set of tonal sub-ranges comprising first and second tonal sub-ranges corresponding to the first and second printable tone levels, respectively, for the first colorant; (c) creating a second printer profile comprising density measurements for the first colorant from the second nozzle that are different that the density measurements of the first printer profile; and (d) creating a second set of tonal sub-ranges based upon said second printer profile of the second nozzle; said second set of tonal sub-ranges comprising first and second tonal sub-ranges corresponding to the first and second printable tone levels, respectively, for the first colorant.