OpenCV绘制图形直线voidcv::line (InputOutputArray  img, //图像Point pt1,       //线的起点Point pt2,       //线的终点constScalar& color,  //线的颜色int

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图形绘制OpenCV提供了直线，矩形，圆，椭圆的绘制函数，下面介绍用法直线绘制：line()函数原型： voidline(InputOutputArrayimg,Pointpt1,Pointpt2,constScalar&color,intth

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