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:
Aug. 13, 2013
Filed:
Sep. 28, 2009
Akihiko Tanaka, Kanagawa, JP;
Kazuaki Shintani, Kanagawa, JP;
Shinichi Gono, Kanagawa, JP;
Yosuke Takebe, Kanagawa, JP;
Mitsugu Kamio, Kanagawa, JP;
Mayumi Tada, Kanagawa, JP;
Akihiko Tanaka, Kanagawa, JP;
Kazuaki Shintani, Kanagawa, JP;
Shinichi Gono, Kanagawa, JP;
Yosuke Takebe, Kanagawa, JP;
Mitsugu Kamio, Kanagawa, JP;
Mayumi Tada, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
The present invention provides an image reading apparatus that includes: a photoelectric sensor including plural reading pixels aligned in one direction and output an electric signal depending on the amount of light from an image on the document; a read control section that reads a document image with the photoelectric sensor in accordance with a read instruction, and obtains image data; a black correction section that performs a black correction to adjust an output under dark condition of each reading pixel to a value within a predetermined range, the output under dark condition being an electric signal output when the amount of light input is zero; and a black correction execution determining section that determines whether to perform the black correction, when the read interval between each two document sheets of the multi-page document is equal to or shorter than a predetermined period of time.