US 11,941,937 B2
Methods and systems for automatically identifying IR security marks based on known halftone frequency and color information
Sainarayanan Gopalakrishnan, Chennai (IN); Rajasekar Kanagasabai, Chennai (IN); and Haripriya Chandran, Kulathur Chal (IN)
Assigned to Xerox Corporation, Norwalk, CT (US)
Filed by XEROX CORPORATION, Norwalk, CT (US)
Filed on Aug. 2, 2021, as Appl. No. 17/391,253.
Prior Publication US 2023/0030524 A1, Feb. 2, 2023
Int. Cl. H04N 1/32 (2006.01); G07D 7/121 (2016.01); H04N 1/00 (2006.01); G07D 7/00 (2016.01); G07D 7/202 (2016.01)
CPC G07D 7/121 (2013.01) [H04N 1/00331 (2013.01); H04N 1/32256 (2013.01); G06T 2207/10024 (2013.01); G07D 7/00 (2013.01); G07D 7/202 (2017.05); H04N 1/00838 (2013.01); H04N 1/00856 (2013.01); H04N 1/0087 (2013.01); H04N 2201/327 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for detecting Infrared (IR) security mark based on known halftone frequency information and known color information, the method comprising:
receiving a document from a user, comprising an IR security mark;
scanning the document;
based on the known color information and location information related to the IR security mark, extracting the IR security mark from the scanned document, wherein the location information indicates a location of the IR security mark in the document;
verifying halftone frequency information of the extracted IR security mark;
based on the successful verification, identifying text in the extracted IR security mark; and
comparing the identified text with one or more pre-stored IR security marks to ascertain whether the IR security mark in the document is an authentic security mark.