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:
Nov. 15, 1994
Filed:
Aug. 28, 1992
Michel J Denber, Rochester, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
Image quality is improved by the prevention of aliasing using a hierarchial pattern matching operation incorporating variable-sized templates. A template which is passed over an image is partitioned into a plurality of sub-templates. The corner sub-templates of the template are eliminated from consideration. It is determined whether the remaining sub-templates contain anything other than all-white or all-black. If a sub-template reports something other than all-white or all-black, the sub-template is checked with a matching region. The matching region defines the action to be taken on the central pixel beneath the template. The pattern matching operation prevents the necessity for an increased memory capacity while providing increased levels of gray for each pixel.