题目/Title：A New Algorithm for Accurate and Automatic Chessboard Corner Detection

作者/Author：张寓弛,李国林,谢翔,王志华
                        Yuchi Zhang,Guolin Li,Xiang Xie,Zhihua Wang

会议/Conference：ISCAS 2017

地点/Location：Baltimore, MD, USA

年份/Issue Date：2017.28-31 May

页码/pages：pp. 1 - 4

摘要/Abstract：
In this paper, we propose an accurate automatic chessboard corner detecting algorithm of sub-pixel precision. The algorithm is based on a novel hyperbolic tangent model. A set of corners are detected initially by Harris’ algorithm. Then the hyperbolic tangent model for each corner point is optimized by parameter adjustment. Finally, we use the optimal model to obtain the sub-pixel position of each corner with fake corner elimination. Experiments on three datasets show that the proposed method achieves a detection rate of at least 98% and a reprojection error in camera calibration of at most 0.85 pixels. Our algorithm significantly outperforms the methods in three related works.