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. 20, 2016
Filed:
Dec. 11, 2013
Peking University Founder Group Co., Ltd., Beijing, CN;
Founder Mobile Media Technology (Beijing) Co., Ltd., Beijing, CN;
Ling Zhang, Beijing, CN;
Chao Guan, Beijing, CN;
Zhenhua Liu, Beijing, CN;
Gezhang Liu, Beijing, CN;
Wanyi Che, Beijing, CN;
PEKING UNIVERSITY FOUNDER GROUP CO., LTD., Beijing, CN;
FOUNDER MOBILE MEDIA TECHNOLOGY (BEIJING) CO., LTD., Beijing, CN;
Abstract
Method and system for detecting a correction pattern in a QR code are disclosed. In the detection of a correction pattern, coordinates of the correction pattern is at first roughly estimated according to the detected coordinates of the detection patterns and different QR code versions, then a square region is specified around the coordinates of the correction pattern, in which a search is performed repeatedly. Finally, in conjunction with the characteristic of the correction pattern itself, i.e., having a line segment meeting a predetermined ratio, the correction pattern may be accurately located in the predetermined area, without the need of searching patterns meeting a 1:1:1 ratio line by line in the entire QR code image.