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:
Sep. 09, 2008
Filed:
Aug. 15, 2003
Applicants:
Daniel E. Viassolo, Schenectady, NY (US);
Howard A. Mizes, Pittsford, NY (US);
Inventors:
Daniel E. Viassolo, Schenectady, NY (US);
Howard A. Mizes, Pittsford, NY (US);
Assignee:
Xerox Corporation, Norwalk, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 9/40 (2006.01); G06K 15/00 (2006.01); G06T 5/00 (2006.01); H04N 1/407 (2006.01); H04N 1/409 (2006.01); H04N 1/46 (2006.01); H04N 9/64 (2006.01);
U.S. Cl.
CPC ...
Abstract
An image processing method to reduce streaking on a printed sheet uses a negative feedback system to reduce streaking. The method scans a printed sheet to produce image data. The method further measures gray-levels of the image data and computes a compensation vector from the measured gray-levels as the difference between a nominal tonal-resproduction-curve and local tonal-reproduction-curves. The compensation vector is applied the image data to be printed. The compensation vector emphasizes ranges of frequencies sensitive of the human eye.