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. 05, 2006
Filed:
Feb. 24, 2003
Applicants:
Zhichun Lei, Stuttgart, DE;
Piergiorgio Sartor, Fellbach, DE;
Yalcin Inescu, Hamburg, DE;
Peter Wagner, Waiblingen, DE;
Inventors:
Zhichun Lei, Stuttgart, DE;
Piergiorgio Sartor, Fellbach, DE;
Yalcin Inescu, Hamburg, DE;
Peter Wagner, Waiblingen, DE;
Assignee:
Sony Deutschland GmbH, Cologne, DE;
Primary Examiner:
Int. Cl.
CPC ...
H04N 5/52 (2006.01);
U.S. Cl.
CPC ...
Abstract
An adaptive histogram equalization method is introduced which allows the histogram equalization amount to automatically adapt to the original image contrasts, which can be measured from the originals. Contrast over-enhancement is avoided by limiting the spatial frequency response of the histogram. Besides that, methods to remedy the brightness change problem encountered by histogram equalization are described.