统计面积百分比

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;
}