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:
Feb. 07, 2006
Filed:
Jun. 29, 2001
Jason Quintana, Brush Prairie, WA (US);
Morgan T. Schramm, Portland, OR (US);
Je-ho Lee, West Lafayette, IN (US);
Jason Quintana, Brush Prairie, WA (US);
Morgan T. Schramm, Portland, OR (US);
Je-Ho Lee, West Lafayette, IN (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A halftoning method and apparatus reduces the occurrence of unaesthetic color print output associated with the different relationships found in the numeric data contained within the color data planes. The calculation, modification and distribution of error values, resulting from the mismatch between color plane values and firing thresholds, are performed in a manner that minimizes unaesthetic conditions. Error values are modified by use of error modification functions, bitmaps and matrixes. Firing decisions are based on a comparison of the modified error.