US 12,322,003 B2
Methods and systems for signal processing
Geoffrey B. Rhoads, West Linn, OR (US)
Assigned to Digimarc Corporation, Beaverton, OR (US)
Filed by Digimarc Corporation, Beaverton, OR (US)
Filed on Apr. 30, 2021, as Appl. No. 17/246,395.
Application 17/246,395 is a division of application No. 15/966,754, filed on Apr. 30, 2018, granted, now 10,997,685, issued on May 4, 2021.
Application 15/966,754 is a division of application No. 15/331,433, filed on Oct. 21, 2016, granted, now 9,959,588, issued on May 1, 2018.
Application 15/331,433 is a division of application No. 13/918,559, filed on Jun. 14, 2013, granted, now 9,477,884, issued on Oct. 25, 2016.
Claims priority of provisional application 61/659,816, filed on Jun. 14, 2012.
Prior Publication US 2021/0350497 A1, Nov. 11, 2021
Int. Cl. G06K 9/00 (2022.01); G06T 1/00 (2006.01); G09C 5/00 (2006.01); H04L 9/14 (2006.01); H04L 9/30 (2006.01); H04L 9/40 (2022.01); H04W 12/033 (2021.01)
CPC G06T 1/0064 (2013.01) [G06T 1/0021 (2013.01); G09C 5/00 (2013.01); H04L 9/14 (2013.01); H04L 9/30 (2013.01); H04L 63/0428 (2013.01); H04W 12/033 (2021.01); G06T 2201/0051 (2013.01); G06T 2201/0601 (2013.01); H04L 2209/608 (2013.01); H04L 2209/80 (2013.01)] 27 Claims
OG exemplary drawing
 
1. An image processing method comprising:
obtaining imagery, the obtained imagery comprising a signal encoded therein;
processing the obtained imagery to yield a sparse sampling of locations within the obtained imagery, and processing image data at the sparse sampling of locations within the obtained imagery to yield local image information, said local image information being inadequate to reveal a subject depicted in the obtained imagery;
using the local image information, resolving geometric distortion of the obtained imagery, the geometric distortion comprising scale and rotation, said resolving yielding geometrically resolved imagery;
detecting the encoded signal from the geometrically resolved imagery using secret detecting information;
based upon a successful detecting of the encoded signal, accessing metadata associated with the imagery;
sharing the metadata without sharing the secret detecting information.