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. 19, 2000
Filed:
Mar. 05, 1998
Hiromi Okubo, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image processing device of the present invention includes a photoelectric transducing section for transforming input image information to an electric signal. An analog-to-digital converter converts the electric signal to a digital signal. An image processing section for processing the digital signal has a shading correcting section, a filtering section, a magnification changing section, a gamma correcting section, and a tonality processing section. The filtering section is capable of selecting a particular filter intensity for each of two perpendicular directions in accordance with a desired magnification change ratio. The device is capable of varying an MTF (Modulation Transfer Function) characteristic in the subscanning direction in accordance with a magnification change ratio with simple hardware.