#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
//#include<opencv2/opencv.hpp>//如果要包含所有庫
using namespace cv;
void main()
{
//這一段程序實現:圖像img -> ptr[][] -> 圖像img2 的傳遞過程,即圖像->二維數組->圖像
int i = 0, j = 0;
Mat img = imread("F:\\photoCollection\\flowergirl.png", 0);//讀取圖像img。0表示轉換爲灰度圖像讀入
int row = img.rows;
int col = img.cols;
namedWindow("原圖");
imshow("原圖", img);
Mat img2 = Mat(row, col, CV_8UC1);//圖像img2:row*col大小
uchar **ptr = (uchar **)malloc(row*sizeof(uchar *));//二維數組ptr[][]
for (i = 0; i < row; i++)
ptr[i] = (uchar *)malloc(col*sizeof(uchar));
uchar *ptmp = NULL;//這是關鍵的指針!!
for (i = 0; i < row; i++)
{
ptmp = img2.ptr<uchar>(i);//指針指向img2的第i行
for (j = 0; j < col; j++)
{
ptr[i][j] = img.at<uchar>(i, j);//img的矩陣數據傳給二維數組ptr[][]
ptmp[j] = ptr[i][j];//二維數組數據傳給img2的第i行第j列
}
}
namedWindow("新圖");
imshow("新圖", img2);
// 等待100000 ms後窗口自動關閉
waitKey(100000);
}
轉載https://blog.csdn.net/qq_20585527/article/details/81632532