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:
Jul. 27, 2004
Filed:
May. 19, 2000
Applicant:
Inventors:
Daniel H. Greene, Sunnyvale, CA (US);
Eric H. Kuo, Cambridge, MA (US);
Assignee:
Xerox Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K 1/502 ; G06K 9/03 ; G06K 9/36 ; G06K 1/906 ;
U.S. Cl.
CPC ...
G06K 1/502 ; G06K 9/03 ; G06K 9/36 ; G06K 1/906 ;
Abstract
A system encodes a separate assist channel that carries only a small amount of additional information in a hardcopy document to compensate for failure of an OCR system to accurately reconstruct a scanned electronic version of the hardcopy document. The assist channel protects symbols printed on the hardcopy document by computing Reed-Solomon error correcting codes for vertical columns of symbols. Decoding is synchronized along a line of text at each symbol block. When an error correcting code corrects an error produced during OCR processing, the remainder of the line containing the error is revised.