opencv c++ Mat对象

#include
#include
#include

using namespace cv;
using namespace std;
int main()
{
	Mat src = imread("C:/Users/asus/Desktop/tupian/1.jpg");
	if (src.empty())
	{
		printf("could not load image...\n");
		return -1;
	}
	namedWindow("opencv setup demo", WINDOW_AUTOSIZE);
	imshow("opencv setup demo", src);
	Mat dst;

	dst = Mat(src.size(), src.type());
	dst = Scalar(127, 0, 255);
	dst = src.clone();
	namedWindow("clone", WINDOW_AUTOSIZE);
	imshow("clone", dst);
	src.copyTo(dst);
	namedWindow("copyTo", WINDOW_AUTOSIZE);
	imshow("copyTo", dst);

	
	namedWindow("output", WINDOW_AUTOSIZE);
	cvtColor(src, dst, COLOR_BGR2GRAY);
	printf("%d\n", src.channels());
	printf("%d\n", dst.channels());

	int cols = dst.cols;
	int rows = dst.rows;
	printf("%d\n%d\n", cols,rows);
	const uchar* firstRow = dst.ptr(0);
	printf("%d\n", *firstRow);

	Mat M(100, 100, CV_8UC3, Scalar(0, 0, 255));
	//cout << "M = " << endl << M << endl;
	Mat m1;
	m1.create(src.size(), src.type());
	m1 = Scalar(0, 0, 255);

	Mat csrc;
	Mat kernel = (Mat_(3, 3) << 0, -1, 0, -1, 5, -1, 0, -1, 0);
	filter2D(src, csrc, -1, kernel);

	Mat m2 = Mat::zeros(2,2, CV_8UC3);
	cout << m2 << endl;
	Mat m3 = Mat::eye(2, 2, src.type());
	cout << m3 << endl;
	imshow("output", csrc);
	waitKey(0);
	return 0;
	
}