Image processing apparatus and image processing method
AssigneeCanon Kabushiki Kaisha
InventorsHiroyasu Kunieda, Akitoshi Yamada, Yoichi Kashibuchi
Life of this patent
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Abstract
Provided is an image processing apparatus for extracting embedded information from a printed document, including: a first obtaining unit configured to obtain a printing method of the printed document; a second obtaining unit capable of obtaining first image data by reading the printed document while applying light to the printed document; a third obtaining unit capable of obtaining second image data by reading the printed document without applying light to the printed document; and an extraction unit configured to extract the embedded information by using at least one of the first image data and the second image data according to the printing method obtained by the first obtaining unit.
Claims20
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.
A method of controlling an image processing apparatus for extracting embedded information from a printed document, the method comprising:
- obtaining printing information which indicates whether the printed document is printed with a first printing method or a second printing method;
- obtaining, 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;
- obtaining, based on the printing information, second image data read whithout applying light to the printed document in a case where the printed document is printed with the second printing method;
- and
- extracting the embedded information by using at least one of the first image data or the second image data.
Dependencies are inferred from the claim text.