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:
Mar. 30, 1999
Filed:
Mar. 27, 1996
Applicant:
Inventor:
Thomas Robson, Penfield, NY (US);
Assignee:
Xerox Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ; G09G / ; H04N / ; H04N / ;
U.S. Cl.
CPC ...
382296 ; 382293 ; 382297 ; 345126 ; 348583 ; 3582611 ;
Abstract
The present invention is a method and apparatus for the fast rotation of binary images represented as a run length encoded data stream. The system employs a cache memory for efficiently representing parsed RLE data in a rotated orientation, where only the white-black transition points are recorded. Subsequently, the cache memory is further processed using a logic operation to fill in the runs between the recorded transition points during concurrent transfer of the image data to a band of page buffer memory. The process is repeated for a plurality of bands to complete the rotation/decoding process for an entire bitmap image.