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. 09, 2008
Filed:
Jun. 28, 2004
Applicant:
Kwong Huang Goh, Singapore, SG;
Inventor:
Kwong Huang Goh, Singapore, SG;
Assignee:
STMicroelectronics Asia Pacific Pte. Ltd., Singapore, SG;
Primary Examiner:
Int. Cl.
CPC ...
G06K 9/00 (2006.01); G06K 9/40 (2006.01); H04N 5/52 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for enhancing the contrast of video pictures that includes the steps of receiving an input video signal; extracting a picture from said input video signal; determining an active window for said picture; calculating a histogram for luminance values of pixels in said active window of said picture; determining characteristics of said histogram; selecting one suitable mapping function from a plurality of mapping functions based on the determined characteristics of said histogram; and mapping the luminance value of each pixel in said picture in accordance with said selected mapping function.