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:
May. 21, 2002
Filed:
Nov. 12, 1998
Reiner Eschbach, Webster, NY (US);
Fritz F. Ebner, Rochester, NY (US);
Tse-Kee Chan, Penfield, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
Palletized image enhancement systems and methods enhance palletized images by &sgr;-filtering the palletized image. Palletized images, such as GIF images, are analyzed to obtain a number of &sgr; filter parameters based on the global image features of the palletized image. Local portions of the image data are analyzed to determine which of the &sgr; filter parameters should be used for each particular portion. The &sgr; filter parameters are determined based on histograms of the color palette of the palletized image data. As a result, a good balance between color re-creation and image sharpness in the enhanced palletized image is obtained.