对照相机进行标定，与世界坐标系是直角坐标系，以OpenCV为支持，输出摄像机的内参和外参-Calibration of the camera, and the world coordinate system is Cartesian coordinates to OpenCV for the support, the output of the camera internal parameters and external parameters

自己寫的畫圓程序,很容易了解,提供給大家參考-Write C program to draw a circle using c graphics. In this program we use the graphics.h library function to draw a circle. To use graphics.h, we have to install the drivers in to the the system by using the initgraph() funct