算是保存个副本吧：
#include "cv.h"
#include "highgui.h"
#include <fstream>
#include <iostream>
using namespace std;
int main()
{
IplImage* img = cvLoadImage("F:\\易康小分类图1_seg.bmp", 1);
/* always check */
assert(img);
int nWidth = img->width;
int nHeight = img->height;
int step = img->widthStep;
int channels = img->nChannels;
int i,j;
int sum1 = 0,sum2 = 0,sum3 = 0,sum4 = 0,sum5 = 0;
for( i=0;i<nHeight;i++)
for( j=0;j<nWidth;j++)
{
CvScalar s = cvGet2D(img,i,j);
if((int)s.val[0] == 230 && (int)s.val[1] == 80 && (int)s.val[2] == 140)
++sum1;
else
if((int)s.val[0] == 140 && (int)s.val[1] == 80 && (int)s.val[2] == 30)
++sum2;
else
if((int)s.val[0] == 20 && (int)s.val[1] == 0 && (int)s.val[2] == 230)
++sum3;
else
if((int)s.val[0] == 30 && (int)s.val[1] == 140 && (int)s.val[2] == 90)
++sum4;
else
if((int)s.val[0] == 90 && (int)s.val[1] == 10 && (int)s.val[2] == 80)
++sum5;
}
//ofstream infile("E:\\infile.txt");
//int sum = sum1+sum2+sum3+sum5+sum4 ;
float fsum = nWidth*nHeight;
cout << "1:" << sum1/fsum<<endl
<< "房屋: "<<sum2/fsum << endl
<< "3: "<<sum3/fsum <<endl
<< "土地: "<<sum4/fsum <<endl
<< "绿地: "<<sum5/fsum <<endl;
//infile << "图像总像素数为："<< sum << endl;
//infile <<"道路： "<< sum1 << "，占总面积百分比为： " << sum1/fsum << endl
// <<"为损坏建筑物： "<< sum2 << "，占总面积百分比为： " << sum2/fsum << endl
// <<"损坏建筑物： "<< sum3 << "，占总面积百分比为： " << sum3/fsum << endl
// <<"林地： "<< sum4 << "，占总面积百分比为： " << sum4/fsum << endl
// <<"土地： "<< sum5 << "，占总面积百分比为： " << sum5/fsum << endl;
//infile.close();
cvSaveImage("E:\\m1.bmp",img);
//cvShowImage("Image",img);
//cvWaitKey(0); //等待按键
//cvDestroyWindow( "Image" );//销毁窗口
return 0;
}