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:
Jun. 13, 2000
Filed:
Aug. 06, 1997
Minoru Takeuchi, Iwate-ken, JP;
Mitsuo Hirano, Iwate-ken, JP;
Apls Electric Co., Ltd., , JP;
Abstract
A high-quality image is recorded in precise correspondence with the image information of a document sensed by an image scanner without producing an error in gray level. Control means performs a gray level correction on the image information sensed by the image scanner in accordance with the surface gray level information of a reference plate which has been sensed in advance by the image scanner thereby generating recording information corrected in gray level, wherein the gray level correction is performed when the recording information is generated from the image information thereby making compensation not only for the shading error but also for gray level errors due to other factors so that an image is recorded in exact correspondence with the sensed image information of the document without having an error in gray level. Correction values are set for each sensing element of the image scanner so that the corrected output value of each sensing element obtained in accordance with said correction values becomes proportional to the brightness. The image information sensed via the image sensing elements is corrected in accordance with the above correction values thereby generating a corrected output value.