实现轮廓跟踪，并画出轮廓，此程序得出的是圆的轮廓，求得圆的中心和半径，将此圆画出，与实际的圆形成对比。用OPENCV库函数在WIN32控制台中编写.-To achieve contour tracing, and draw the outline, this procedure leads to an outline of the circle, to seek the circle center and radius of this circle draw, in contrast with the actual round. Library functions with OPENCV prepared in the WIN32 console.