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. 30, 1999
Filed:
Oct. 22, 1997
Fuminori Moro, Toyokawa, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
The present invention pertains to a book scanner that reads the image of an document such as a book or magazine while it is placed open and face up, and more particularly, to an image reader that detects the height distribution of the document prior to performing a pre-scanning to detect the size of the document and the background luminance of the document. Thus, a focal length adjustment is performed in response to the detected height distribution while the pre-scanning takes place in order to prevent defocusing caused by the curvature of the document consisting of an open book or magazine. The book reader also reads the book in at least two spectral regions to detect and eliminate image anomalies.