2020.6.12_p35_OpenCV uses the member function rowRang or colRange to get the continuous rows or columns of the matrix

//2020.6.12_p35_Use the member function rowRang or colRange to get the continuous rows or columns of the matrix
//Range(int _start,int _end), this is a left-closed and open sequence (_start,_end), Range(2, 5), the sequence generated is 2, 3, 4. Left package right does not include
// copy clone matrix

//2020.6.12_p35_使用成员函数rowRang或colRange得到矩阵的连续行或者连续列
//Range(int _start,int _end),这是一个左闭有开的序列[_start,_end), Range(2,5),产生的是2，3，4的序列。左包右不包括
//复制克隆矩阵
#include <opencv2/core.hpp>
using namespace cv;
#include <iostream>
using namespace std;

int main(int argc, char *argv[])
{
	Mat matrix = (Mat_<int>(5,5)<<1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,
		17,18,19,20,21,22,23,24,25);
	//访问matrix的第2行与第3行。
	//Mat r_range = matrix.rowRange(Range(2,4));
	//也可以直接写
	Mat r_range = matrix.rowRange(2, 4);
	
	for (int r = 0; r < r_range.rows; r++)
	{
		for (int c = 0; c < r_range.cols; c++)
		{
			cout << r_range.at<int>(r, c) << ",";
		}
		cout << endl;
	}
	cout << "获取第1，2列" << endl;
	Mat c_range = matrix.colRange(1, 3);//获取第1，2列
	for (int r = 0; r < c_range.rows; r++)
	{
		for (int c = 0; c < c_range.cols; c++)
		{
			cout << c_range.at<int>(r, c) << ",";
		}
		cout << endl;
	}

	cout << "修改了r_range里面的第一个值后：" << endl;
	r_range.at<int>(0, 0) = 1000;

	cout << "r_range里面的第一个值后：r_range结果" << endl;
	for (int r = 0; r < r_range.rows; r++)
	{
		for (int c = 0; c < r_range.cols; c++)
		{
			cout << r_range.at<int>(r, c) << ",";
		}
		cout << endl;
	}

	cout << "r_range里面的第一个值后：matrix结果" << endl;
	for (int r = 0; r < matrix.rows; r++)
	{
		for (int c = 0; c < matrix.cols; c++)
		{
			cout << matrix.at<int>(r, c) << ",";
		}
		cout << endl;
	}
	cout << endl;

	//复制克隆矩阵，clone,copyTo
	Mat r_range1 = matrix.rowRange(2, 4).clone();
	Mat r_range2;
	matrix.rowRange(2, 4).copyTo(r_range2);
	cout << "clone结果：" << endl;
	for (int r = 0; r < r_range1.rows; r++)
	{
		for (int c = 0; c < r_range1.cols; c++)
		{
			cout << r_range1.at<int>(r, c) << ",";
		}
		cout << endl;
	}
	cout << "copyTo结果：" << endl;
	for (int r = 0; r < r_range2.rows; r++)
	{
		for (int c = 0; c < r_range2.cols; c++)
		{
			cout << r_range2.at<int>(r, c) << ",";
		}
		cout << endl;
	}
}