opencvc++画图

#include<opencv2\opencv.hpp>
#include<iostream>
#include<math.h>

using namespace cv;

Mat src;

void MyLines();

int main()
{
	src = imread("C:/Users/asus/Desktop/tupian/1.jpg");
	Mat dst,m1;
	if (!src.data)
	{
		printf("could not load image...\n");
		return -1;
	}
	char input_image[] = "input_image";
	MyLines();
	namedWindow(input_image, 1);
	imshow(input_image, src);
	
	
	waitKey(0);
	return 0;

}

void MyLines()
{
	Point p1 = Point(20, 30);
	Point p2;
	p2.x = 300;
	p2.y = 300;
	Scalar color = Scalar(0, 0, 255);
	line(src, p1, p2, color, 1, LINE_8);
}

#incl