US 12,322,004 B2
Embedding signals in a raster image processor
Tomas Filler, Beaverton, OR (US); Alastair M. Reed, Lake Oswego, OR (US); and John F. Stach, Portland, OR (US)
Assigned to Digimarc Corporation, Beaverton, OR (US)
Filed by Digimarc Corporation, Beaverton, OR (US)
Filed on Jan. 31, 2022, as Appl. No. 17/589,762.
Application 17/589,762 is a continuation of application No. 16/455,622, filed on Jun. 27, 2019, granted, now 11,238,556.
Application 16/455,622 is a continuation of application No. 15/621,843, filed on Jun. 13, 2017, abandoned.
Application 15/621,843 is a continuation of application No. 13/789,126, filed on Mar. 7, 2013, granted, now 9,684,941, issued on Jun. 20, 2017.
Claims priority of provisional application 61/719,920, filed on Oct. 29, 2012.
Prior Publication US 2022/0335561 A1, Oct. 20, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G06T 1/00 (2006.01); G06T 7/246 (2017.01); G06T 7/73 (2017.01)
CPC G06T 1/0064 (2013.01) [G06T 7/246 (2017.01); G06T 7/73 (2017.01); G06T 2201/0065 (2013.01); G06T 2207/10016 (2013.01); G06T 2207/30244 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An image processing method of embedding a signal within imagery using a raster image processing (RIP), comprising:
obtaining a plurality of elements representing a signal;
modulating a plurality of print structures within the RIP according to the plurality of elements, in which said modulating varies density, and direction in an Lab colorspace, of the plurality of print structures, and in which said modulating introduces the signal within the imagery, such that the signal corresponds to different directions in the Lab colorspace at different regions throughout the imagery.