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:
Feb. 13, 2024
Filed:
Mar. 05, 2020
Dalian University of Technology, Liaoning, CN;
Peng Cheng Laboratory, Guangdong, CN;
Wei Zhong, Liaoning, CN;
Deyun Lv, Liaoning, CN;
Weiqiang Kong, Liaoning, CN;
Risheng Liu, Liaoning, CN;
Xin Fan, Liaoning, CN;
Zhongxuan Luo, Liaoning, CN;
Shengquan Li, Liaoning, CN;
DALIAN UNIVERSITY OF TECHNOLOGY, Liaoning, CN;
PENG CHENG LABORATORY, Guangdong, CN;
Abstract
The present invention discloses a method for adaptively detecting chessboard sub-pixel level corner points. Adaptive detection of chessboard sub-pixel level corner points is completed by marking position of an initial unit grid on a chessboard, using a homography matrix H calculated by pixel coordinates of four corner points of the initial unit grid in a pixel coordinate system and world coordinates in a world coordinate system to expand outwards, adaptively adjusting size of an iteration window in the process of expanding outwards, and finally spreading to the whole chessboard region.