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:
Aug. 08, 2006
Filed:
Sep. 13, 2001
Guo LI, San Diego, CA (US);
Clayton Brian Atkins, Mountain View, CA (US);
Guo Li, San Diego, CA (US);
Clayton Brian Atkins, Mountain View, CA (US);
Hewlett-Packard Development Company, LP., Houston, TX (US);
Abstract
A method and system for enhancing images utilizes the direction of a detected edge within an image block of an input image to selectively smooth or sharpen a pixel of the input image that corresponds to that image block. The direction of a detected edge within the image block is determined by computing the horizontal gradient and the vertical gradient, and then using the ratio of the computed gradients. In an exemplary embodiment, the method and system is designed to exclusively use bit shifting to perform multiplications, rather than using digital signal processing. Consequently, the method and system is suitable for implementation in printer firmware and/or hardware.