US 12,219,110 B2
Security printing using mixed spot sizes in stochastic or frequency modulated halftone images
Chu-heng Liu, Penfield, NY (US); Jorge A. Alvarez, Webster, NY (US); Douglas L. Herrmann, Webster, NY (US); Jason Matthew LeFevre, Penfield, NY (US); and Seemit Praharaj, Webster, NY (US)
Assigned to Xerox Corporation, Norwalk, CT (US)
Filed by Xerox Corporation, Norwalk, CT (US)
Filed on Jul. 7, 2022, as Appl. No. 17/859,901.
Prior Publication US 2024/0015258 A1, Jan. 11, 2024
Int. Cl. H04N 1/32 (2006.01); G06K 15/10 (2006.01)
CPC H04N 1/32256 (2013.01) [G06K 15/102 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of securely rendering a security feature with image data to be printed, comprising:
providing within the image data, data relating to a plurality of spots;
within the image data, mixing spots of at least two spot sizes among the plurality of spots based on a level of drop size mixing with respect to the at least two spot sizes to embed information as a security feature within an image comprising at least one of a stochastic halftone image or a frequency modulated (FM) halftone image; and
rendering the image with a printer.