US Patent No. 10,389,914

INK-OPTIMIZED HALFTONE SCREEN


Patent No. 10,389,914
Issue Date August 20, 2019
Title Ink-optimized Halftone Screen
Inventorship Alex Veis, Kadima (IL)
Assignee HP SCITEX LTD., Netanya (IL)

Claim of US Patent No. 10,389,914

1. A method of generating data representing a halftone screen, the method comprising:generating tonal data of a first colorant for a plurality of pixels according to a darkness level by assigning a tonal value to at least a first subset of the plurality of pixels, wherein said tonal value takes a value equal to any of a plurality of ordered tonal values, wherein a difference between a maximal tonal value and a minimal tonal value assigned to pixels of the first subset is equal to or smaller than a predefined threshold; and wherein, for a given darkness level, a number of pixels with the minimal tonal value is maximized;
wherein the darkness level is related to a ratio of a sum of the tonal values of all pixels of the plurality of pixels to a number of pixels of the plurality of pixels; wherein a pixel having a tonal value greater than the minimal tonal value assigned to pixels of the first subset is adjacent to a pixel having at least the same tonal value; and wherein the tonal value of every pixel is equal to or smaller than a predefined maximal value.