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:
Nov. 13, 2012
Filed:
Aug. 21, 2008
Applicants:
Min Chen, Hong Kong, CN;
Huajun Peng, Hong Kong, CN;
Guoping Qiu, Hong Kong, CN;
Inventors:
Assignee:
Hong Kong Applied Science and Technology Research Institute Company Limited, Shatin, New Territories, HK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K 9/40 (2006.01); G09G 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Enhancement of an image includes adjusting its brightness and then adjusting the contrast of the brightness adjusted image. Adjusting the brightness uses an estimation of real world luminance. Contrast adjustment involves extracting background and contrast information, adjusting the contrast information by an adjustment factor based on the background information and combining the background corrected contrast information to obtain an output image.