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. 18, 2012
Filed:
Feb. 16, 2011
Applicants:
Wen-hung Hsieh, Jubei, TW;
Ching-jung Tsai, Taichung, TW;
Chih-hung Yang, Taichung, TW;
Inventors:
Assignee:
Asia Optical Co., Inc., Tepz, Taichung, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K 9/40 (2006.01);
U.S. Cl.
CPC ...
Abstract
An image contrast evaluation method is disclosed. First, focusing is performed based on the contrast value of an image rendered by a lens on optical sensors, wherein the calculation of the contrast value comprises: selecting an area of the image, calculating the absolute value of brightness difference between each neighboring pixel, and selecting a specific value there from as the contrast value of the image based on a distribution of the calculated absolute values of the brightness differences.