OpenCV Mat::rowRange

Mat Mat::rowRange(int startrow, int endrow)

取出矩阵 [startrow, endrow) 行 ，如rowRange(0, 2)意识是取出第0行和第1行

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colRange(0, 2)意思是取出矩阵的第0列和第1列，然后重组成一个新的矩阵返回

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#include "pch.h"
#include <opencv2/opencv.hpp>
#include <iostream>

using namespace cv;
using namespace std;

int main(int argc, char** argv) {
	Mat Test = (Mat_<double>(3, 3) << 0, 1, 2, 3, 4, 5, 6, 7, 8);
	cout << "Total matrix:" << endl;
	cout << Test << endl;

	Mat testrow = Test.rowRange(0, 2).clone();
	cout << "Row range:" << endl;
	cout << testrow << endl;
	cout << "Test 1 row:" << endl;
	cout << Test.row(0) << endl;

	Mat testcol = Test.colRange(0, 2).clone();
	cout << "Col range:" << endl;
	cout << testcol << endl;

	waitKey(0);
	return 0;
}

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FR:徐海涛（hunk Xu)