Patent ID: 11889038
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An image processing apparatus for extracting embedded information from a printed document, the image processing apparatus comprising:
one or more circuits; or
one or more processors and at least one memory, the at least one memory being coupled to the one or more processors and having stored therein instructions executable by the one or more processors, wherein at least one of (a) the one or more circuits or (b) the execution of the instructions cause the image processing apparatus to function as a plurality of units comprising:
(1) a first obtaining unit configured to obtain printing information which indicates whether the printed document is printed with a first printing method or a second printing method;
(2) a second obtaining unit configured (a) to obtain, based on the printing information, first image data read while applying light to the printed document in a case where the printed document is printed with the first printing method and (b) to obtain, based on the printing information, second image data read without applying light to the printed document in a case where the printed document is printed with the second printing method; and
(3) an extraction unit configured to extract the embedded information by using at least one of the first image data or the second image data.