Patent ID: 11941937
Assignee: XEROX CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
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.