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:
Aug. 06, 2013
Filed:
Dec. 22, 2010
Applicants:
Wei-ning Sun, Zhejiang, CN;
Jin Wang, Zhejiang, CN;
Inventors:
Wei-Ning Sun, Zhejiang, CN;
Jin Wang, Zhejiang, CN;
Assignee:
ArcSoft Hangzhou Co., Ltd., Hangzhou, Zhejiang, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K 9/40 (2006.01); G06K 9/36 (2006.01); H04N 1/407 (2006.01);
U.S. Cl.
CPC ...
Abstract
An image rectification method includes the steps of: detecting edges in an image by using a Canny filter; performing Hough transform on the edges to detect lines in the image; selecting a candidate quadrangle from quadrangles formed by the detected lines; obtaining a transform matrix for transforming the candidate quadrangle to a rectangle by homographic transform; rectifying the image by using the transform matrix; and enhancing the rectified image.