作图操作

画线

line(Mat img,Point pt1,Point pt2,Scalar color,int thickness,int lineType,int shift)

矩形

rectangle(Mat img,Point pt1,Point pt2,Scalar color,int thickness,int lineType,int shift)

circle(Mat img,Point center,int radius,Scalar color,int thickness,int lineType,int shift)

椭圆

ellipse(Mat img,Point center,Size axes,double angle,double startAngle,double endAngle,Scalar color,int thickness,int lineType,int shift)

文字

putText(Mat img,String text,Point org,int fontFace,double fontScale,Scalar color,int thickness)

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