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. 05, 2009
Filed:
Sep. 20, 2005
Hongcheng Wang, Urbana, IL (US);
Yunqiang Chen, Plainsboro, NJ (US);
Tong Fang, Morganville, NJ (US);
Jason Jenn-kwei Tyan, Princeton, NJ (US);
Hongcheng Wang, Urbana, IL (US);
Yunqiang Chen, Plainsboro, NJ (US);
Tong Fang, Morganville, NJ (US);
Jason Jenn-Kwei Tyan, Princeton, NJ (US);
Siemens Medical Solutions USA, Inc., Malvern, PA (US);
Abstract
A gradient-based image enhancement and restoration method and system which applies an orientation-isotropy adaptive filter to the gradients of high structured regions, and directly suppresses the gradients in the noise or texture regions. A new gradient field is obtained from which image reconstruction can progress using least mean squares. The method generally comprises: inputting image data; calculating image gradients; defining the gradients as having large or small coherence; filtering the large coherence gradients for edge enhancement; suppressing the small coherence gradients for noise reduction; assembling an enhanced gradient field from the filtered large coherence and suppressed small coherence gradients; and optimizing the assembled gradient field into a restored image.