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:
Dec. 23, 2003
Filed:
Dec. 04, 2000
Applicant:
Inventor:
Norman W. Zeck, Webster, NY (US);
Assignee:
Xerox Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K 9/36 ; G06K 9/46 ;
U.S. Cl.
CPC ...
G06K 9/36 ; G06K 9/46 ;
Abstract
A method and apparatus for compressing and decompressing electronic documents, with improved compression and reduced history memory size requirements. The method includes receiving scan line ordered raster documents ordering the raster data, and compressing the data with a lossless dictionary compression method. The ordering of raster data into vectors accounts for the correlation of pixel data between scan lines, improving the compression. This ordering also reduces the history window size requirements in a sliding window dictionary compression method.