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. 10, 1991
Filed:
Nov. 26, 1990
Applicant:
Inventors:
Akio Nakajima, Osaka, JP;
Hirofumi Hasegawa, Osaka, JP;
Assignee:
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
382 47 ; 382 61 ; 358451 ; 358474 ; 358406 ; 355 55 ; 355 56 ;
Abstract
An image reader having a scanning optical means for a document, a projection lens and an image sensor for reading an image of a document is disclosed. The image reader includes a pattern element on which a predetermined pattern having two edges symmetric with respect to the optical axis of the projection lens at a predetermined reading magnification and a circuit for determining the center position of an image of a document based on data obtained when the predetermined pattern is read by the image sensor through the projection lens at a designated reading magnification.