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. 13, 2011
Filed:
Jun. 04, 2008
Yoshinobu Kagami, Kanagawa, JP;
Yoshinobu Kagami, Kanagawa, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A line image sensor reads an image of a reading position on a contact glass by a plurality of lines in a main-scanning direction. A replacing unit replaces, when there is a pixel whose read values of read data from a plurality of read lines in a same main scanning period are smaller than a predetermined black threshold and an adjacent pixel whose two arbitrary read values have a difference larger than a predetermined threshold near the pixel, and if the pixel remains at a same pixel position in a predetermined number of continuous main scanning periods, replaces read data of the adjacent pixel and a predetermined number of subsequent pixels with white pixel data.