opencv灰度图像和二维数组相互转换操作

// vs2010.cpp  Opencv 2.4.4

#include "stdafx.h"
#include <cv.h>
#include <highgui.h>

int main(int argc, char* argv[])
{
IplImage *src = cvLoadImage("lena.jpg", 0);
cvNamedWindow("source", 1);
cvShowImage("source", src);
cvWaitKey();

int m = src->height;
int n = src->width;
int i, j;
printf("channel = %d", src->nChannels);

// 分配内存
int **p;
p = new int *[m];
for (i=0; i<m; i++)
{
p[i] = new int[n];
}

// 将图像数据存到二位数组中
//CvScalar s;
//for (i=0; i<m; i++)
//{