A Rapid and Automatic Method for Camera Calibration Based on LCD Circle Pattern
Camera calibration based on plane pattern is widely used for its convenience, but current methods to detect patterns and point correspondences are mainly manual or interactive, and the pattern commonly used is a printed chessboard image sticking on plane plate. The paper proposes a novel method to calibrate the camera accurately in a rapid and automatic way. It uses a circle pattern displayed on a LCD screen to avoid the error caused by non-planar calibration object. A moment-based algorithm is used to detect the circle projection center automatically and an algorithm based on topological structure is proposed to obtain an initial point correspondence set. Finally, a subset of the initial point correspondences is used to estimate homography by RANSAC and wrongly detected blob centers are eliminated. Our experiment shows that our method is convenient and rapid to implement without any manual clicking on the images and the calibration results are accurate with a re-projection error of less than 0.6 pixels.
camera calibration circle pattern ellipse detection automatic homography
Xiaqiong Yu Xiangning Chen Feng Cheng Tan Li
Academy of Equipment Command and Technology, Beijing, 101416, China Huazhong University of Science and Technology, Wuhan, 430074, China Wuhan Ordnance NCO Academy of PLA, Wuhan, 430075, China
国际会议
武汉
英文
383-388
2011-10-21（万方平台首次上网日期，不代表论文的发表时间）