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:
Sep. 17, 2019
Filed:
Jul. 10, 2017
Canon Kabushiki Kaisha, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image reading apparatus includes a line sensor to read an image of a document in a read area, a storage unit to store first reference data previously acquired by reading a first white reference member opposite to light receiving elements of the line sensor, a second white reference member of which a length is shorter than a length of the line sensor in the main scanning direction, an acquiring unit to acquire reference data read by the line sensor with the second white reference member and the line sensor opposed to each other, a correction unit to correct an output of the light receiving elements not opposite to the second white reference member, based on the stored first reference data and second reference data acquired by the light receiving elements opposite to the second white reference member among the reference data acquired by the acquiring unit.