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:
Nov. 27, 2001
Filed:
Jul. 21, 1998
Kanehisa Kodan, Toyohashi, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
The image reading apparatus which has an external-light detecting sensor arranged in a position out of the effect of light from an irradiator attached to the apparatus itself, detects an external-light amount which enters into a document surface by use of the sensor, and calculates a main-scan shading corrective coefficient for correcting output value of each pixel in a CCD in response to the detected external-light amount. Therefore, the output value of each pixel in the CCD is accurately corrected based on the calculated coefficient. This allows photographing data to be accurately corrected in response to the external light amount.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile