计算image 积分图

// testopencv.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <opencv2opencv.hpp>
#include <fstream>
#include <vector>
#include <string>
using namespace std;
using namespace cv;
void getFileName(string & filename,vector<string> &vstr)
{
    cout<<"begin read file name from "<< filename<<endl;
    string name;
    ifstream in(filename);
    while(!in.eof())
    {
        in>>name;
        vstr.push_back(name);
    }
    cout<<"end read filename , the total image number is "<< vstr.size()<<endl;
}
void writeIntegral(vector<string> &vstr,string& filename)
{
    cout<<"begin calculate the image integral"<<endl;
    ofstream out(filename,ofstream::binary);
    int num = 0;
    vector<string>::iterator begin = vstr.begin();
    for( ;begin != vstr.end(); begin++)
    {
        //第二个参数为0读进来的image都是灰度的
        Mat img = imread(*begin,0);
        if(img.empty())
        {
            cout<<"read image "<<*begin<<" failed"<<endl;
            continue;
        }
        num++;
        Mat gray_img;
 
        CvMat sour_image=gray_img;
        CvMat *inte_image = cvCreateMat(gray_img.rows+1,gray_img.cols+1,CV_32F);
        cvIntegral(&sour_image,inte_image);

        
        float *f = inte_image->data.fl;
    
        out.write((char*)(f),inte_image->width*inte_image->height*sizeof(float));
    }
    out.close();
    cout<<"total image:"<<vstr.size()<<" cvIntegral number:"<<num<<endl;
}
int _tmain(int argc, _TCHAR* argv[])
{
    vector<string> v;
    getFileName(string("face.txt"),v);
    writeIntegral(v,string("face.dat"));
    waitKey();
    return 0;
}