博客

int main()
{
	Mat src(5, 6, CV_8UC1);
	cout << src << endl;
	cout << "src.rows" << src.rows << endl;
	cout << "src.cols: " << src.cols << endl;
	Size dst(3,4);
	cout << "dst.width: " << dst.width << endl;
	cout << "dst.height: " << dst.height << endl;
	Point2f P(7,8);
	cout << "P.x: " << P.x << endl;
	cout << "P.y: " << P.y << endl;
	return 0;
}


[205, 205, 205, 205, 205, 205;
 205, 205, 205, 205, 205, 205;
 205, 205, 205, 205, 205, 205;
 205, 205, 205, 205, 205, 205;
 205, 205, 205, 205, 205, 205]
src.rows5
src.cols: 6
dst.width: 3
dst.height: 4
P.x: 7
P.y: 8

由上述代码可知：

1、Mat定义的矩阵“先行后列”，上述定义了一个5行6列的矩阵；

2、Size类型“先列后行”，即矩阵大小是3列4行；

3、Point2f类型也是先列后行，第7列第8行的数字；其坐标是水平往右为x轴，竖直向下为y轴

4、Rect(0,0,src.cols.src.rows)

5、dst.creat(src.rows,src.cols,src.type())

6、src.at<uchar>(rows,cols)先行后列