OpenCV-resize:tif->raw

#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>
#include <cstdlib>
#include <fstream>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

using namespace cv;
using namespace std;

int
main(int argc, char *argv[])
{
  FILE *fpo;
  //ofstream out_img;
  //out_img.open(argv[2],ios::out | ios::binary);
  fpo=fopen(argv[2],"wb");

  cout << "check0\n" <<endl;

  Mat src_img = imread(argv[1], 2);
  //Mat src_img = imread("depth_0010-01.tif", 2);
  if(src_img.empty()) return -1;
  //Mat dst_img1;
  Mat dst_img2(src_img.rows*3.0, src_img.cols*3.0, CV_32FC1);

  cout << "check0-1\n" <<endl;

  //float *buffer;
  //buffer=(float *)malloc(dst_img2.rows*dst_img2.cols*sizeof(float));

  cout << "check0-2\n" <<endl;

  // INTER_LINER（バイリニア補間）でのサイズ変更
  //resize(src_img, dst_img1, Size(), 0.3, 0.3);
  // INTER_CUBIC（バイキュービック補間）でのサイズ変更
  //resize(src_img, dst_img2, dst_img2.size(), INTER_CUBIC);
  resize(src_img,dst_img2,Size(),3.0,3.0,0);

  //namedWindow("resize image1", CV_WINDOW_AUTOSIZE|CV_WINDOW_FREERATIO);
 namedWindow("resize image2", CV_WINDOW_AUTOSIZE|CV_WINDOW_FREERATIO);
  //imshow("resize image1", dst_img1);
  imshow("resize image2", dst_img2);

  cout << "check1\n" <<endl;

  cout << dst_img2.rows*dst_img2.cols << endl;

 float dn;
/*
  for(int i=0;i<src_img.rows*3; i++)
  {
     for(int j=0;j<src_img.cols*3; j++)
     {
        //out_img.put(dst_img2.data[i]);
       // dn=(int)(dst_img2.data[i*dst_img2.cols+j]*10);

         // cout << dst_img2.data[i*dst_img2.cols+j] <<endl;
        //cout << i <<endl;
    //printf("%f\n",dn);

    //out_img.put(dst_img2.data[i*dst_img2.cols+j]);
        dn=dst_img2.data[i*src_img.cols*3+j];
        //out_img.write(dn,1);
       //out_img <<
       //fwrite(
       //printf("%f\n",dn);
       fwrite(&dn,sizeof(float),1,fpo);

     }
  }
*/

  //out_img.write(dst_img2.data,dst_img2.rows*dst_img2.cols);

  fwrite(dst_img2.data,sizeof(float),dst_img2.rows*dst_img2.cols,fpo);
  cout << "check2\n" <<endl;

  //imwrite("output.tif",dst_img2);
  fclose(fpo);

  waitKey(0);

}