中文说明：张正友的关于平面模板法实现摄像机内参数标定的算法实现，内附张的算法解释，是做机器视觉的朋友必备的资料，推荐！
English Description：
Zhang Zhengyou on the plane template method to achieve camera calibration algorithm, with Zhang algorithm explanation, is to do machine vision friends essential information, recommended!