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:
Feb. 16, 1993
Filed:
Dec. 08, 1989
Applicant:
Inventors:
Dan S Bloomberg, Palo Alto, CA (US);
Gary E Kopec, Belmont, CA (US);
Assignee:
Xerox Corporation, Rochester, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ; G06K / ; G06K / ; G09G / ;
U.S. Cl.
CPC ...
382 46 ; 382 18 ; 382 51 ; 340727 ; 395137 ;
Abstract
A method and apparatus for identifying and correcting for document skew. Lines of a bitmap are scanned and a variance in the number of ON pixels as a function of skew angle is calculated. Skew of the original document occurs when the variance is a maximum. Once the skew has been identified, the document is deskewed accordingly.