The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 2012
Filed:
Feb. 20, 2008
Tsutomu Sakaue, Yokohama, JP;
Tsutomu Sakaue, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention provides an image processing apparatus, an image processing method, computer-program, and storage medium capable of acquiring a paper fingerprint efficiently and improving convenience for users. An image processing apparatus according to the present invention includes an image sensor acquiring RGB signals. The G signal is separated from the acquired RGB signals, and the RGB signals are input into a gain adjustment+A/D-convertingsection and the separated G signal is input into a gain adjustment+A/D-convertingsection. The gain adjustment+A/D-convertingsection performs gain adjustment on the input G signal on a different basis from the gain adjustment+A/D-convertingsection. The gain-adjusted G signal is input into a paper fingerprint extracting section via a shading correcting section. The paper fingerprint extracting section extracts a paper fingerprint based on the input G signal.