读取图像的像素值

#include "StdAfx.h"
#include"iostream"
#include <fstream>
using namespace std;
#include "cv.h"
#include "highgui.h"
#include <opencv2/opencv.hpp>
int main(int argc, char* argv[])
{
    /* ①
    IplImage*img =  cvLoadImage("rgb.bmp",-1);
    if(img==NULL)
        return 0;
    CvScalar p;
    ofstream outfile("d:\\rgb.txt");
    outfile<<"图像宽和高:"<<img->width<<"*"<<img->height<<endl;
    for(int i=0;i<img->height;i++)
    {
        for(int j=0;j<img->width;j++)
        {
            p = cvGet2D(img,i,j);
            outfile<<p.val[0] <<" "<<p.val[1]<<" "<<p.val[2] <<" "<<endl;
        }    
    }    
*/
///*  ②
    IplImage* img =  cvLoadImage("d://测试/Lena.jpg",-1);
    CvScalar p;
    ofstream outfile1("d:\\b.txt");
    ofstream outfile2("d:\\g.txt");
    ofstream outfile3("d:\\r.txt");
    outfile1<<"图像宽和高:"<<img->width<<"*"<<img->height<<endl;
    outfile1<<"图像B值"<<endl;
    outfile2<<"图像宽和高:"<<img->width<<"*"<<img->height<<endl;
    outfile2<<"图像G值"<<endl;
    outfile3<<"图像宽和高:"<<img->width<<"*"<<img->height<<endl;
    outfile3<<"图像R值"<<endl;
    //cvFlip(img);
    for(int i=0;i<img->width;i++)
    {
        for(int j=0;j<img->height;j++)
        {
            p = cvGet2D(img,i,j);//(j,i)
            outfile1<<p.val[0]<<" ";
            outfile2<<p.val[1]<<" ";
            outfile3<<p.val[2]<<" ";
        }
        outfile1<<endl;
        outfile2<<endl;
        outfile3<<endl;
    }    //*/


    return 0;
}