US 9,813,579 B1
Method and apparatus for generating a multi-layer correlation mark via a monochrome printer
Edward Chapman, Rochester, NY (US)
Assigned to Xerox Corporation, Norwalk, CT (US)
Filed by Xerox Corporation, Norwalk, CT (US)
Filed on Apr. 29, 2016, as Appl. No. 15/142,941.
Int. Cl. H04N 1/40 (2006.01); G06K 15/00 (2006.01); H04N 1/32 (2006.01)
CPC H04N 1/32251 (2013.01) [H04N 1/32208 (2013.01); H04N 1/32219 (2013.01); H04N 2201/0094 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for generating a multi-layer correlation mark via a monochrome printer, comprising:
setting, by a processor, a first scalar value of a channel of the monochrome printer;
setting, by the processor, a second scalar value of the channel of the monochrome printer, wherein the first scalar value and the second scalar value each comprises a percentage value between 0 percent and 100 percent of a level of modulation of the channel, wherein the second scalar value and the first scalar value have a difference greater than 25 percent;
generating, by the processor, a first layer of the multi-layer correlation mark at the first scalar value of the channel;
generating, by the processor, a second layer of the multi-layer correlation mark at the second scalar value of the channel; and
printing, by the processor, the multi-layer correlation mark comprising the first layer at the first scalar value of the channel and the second layer at the second scalar value of the channel.