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:
Jan. 06, 1998
Filed:
Oct. 10, 1996
Thomas B Pritchard, Brush Prairie, WA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A method for reducing the volume of ink applied to high-density print regions by depleting certain pixels in these regions avoids problems associated with excessive ink, improves economy, and yet retains print quality. Pixels located along the edges of high-density regions are identified and not depleted, thus preserving the sharp image demarcations characteristic of high quality printing. An upper bound for the percentage of depleted pixels may be chosen. A two-dimensional depletion table having certain entries designated as potential depletion candidates is tiled across a pixel image to be depleted. The designated entries are spaced apart within the table. If a pixel in the image is a candidate to be depleted according to the depletion table and if it is not an edge pixel, then it is depleted.