Sub-Regional Camera Calibration Based on Moving Light Target with Coordinate Measuring Machine
To achieve high-accuracy camera parameters,calibration template with strict precision and high production costs is always indispensable in classical camera calibration method.In this paper,we suggest a simple and practical approach to camera calibration combined a novel idea called sub-regional theory in order to higher the accuracy.A round light target moves with the Coordinate Measuring Machine (CMM) to form a set of accurate spacial points.Meanwhile,camera captures images of the target which are transferred to computer and being processed to obtain the center position of target in the image plane.The image plane is divided into several regions and improved Tsais method based on Radial Accordance Constraint (RAC) is applied to calculate the camera parameters of every region.Then we analyzed the form error and measured the real distance of two points which are reflected into the camera coordinate system.The experimental results show significant improvements over oneregion camera calibration.
camera calibration sub-regional theory light target RAC
Ying-Hua Dong Shu-Gui Liu
College of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin, Chin Sate Key Laboratory of Precision Measuring Technology & Instruments, Tianjin University, Tianjin, Ch
国际会议
天津
英文
96-100
2012-10-16（万方平台首次上网日期，不代表论文的发表时间）