OpenCV计算连通区域数目与最大连通区域并标示出

#include <stdio.h>#include <cv.h>#include <highgui.h>#pragma comment(lib, "cv.lib")#pragma comment(lib, "cxcore.lib")#pragma comment(lib, "highgui.lib")int main( int argc, char** argv )  { IplImage* src = cvLoadImage(".\\wind.png", CV_LOAD_IMAGE_GRAYSCALE); IplImage* dst = cvCreateImage(cvGetSize(src), 8, 3); CvMemStorage* storage = cvCreateMemStorage(0); CvSeq* contour = 0; cvThreshold(src, src,120, 255, CV_THRESH_BINARY); // 二值化 cvNamedWindow("Source", 1); cvShowImage("Source", src); // 提取轮廓 int contour_num = cvFindContours(src, storage, &contour, sizeof(CvContour), CV_RETR_CCOMP, CV_CHAIN_APPROX_SIMPLE); cvZero(dst);  // 清空数组 CvSeq *_contour = contour;  double maxarea = 0; double minarea = 100; int m = 0; for( ; contour != 0; contour = contour->h_next )   {    double tmparea = fabs(cvContourArea(contour));  if(tmparea < minarea)     {     cvSeqRemove(contour, 0); // 删除面积小于设定值的轮廓   continue;  }    CvRect aRect = cvBoundingRect( contour, 0 );   if ((aRect.width/aRect.height)<1)    {     cvSeqRemove(contour, 0); //删除宽高比例小于设定值的轮廓   continue;  }    if(tmparea > maxarea)    {     maxarea = tmparea;  }    m++;  // 创建一个色彩值  CvScalar color = CV_RGB( 0, 255, 255 );  //max_level 绘制轮廓的最大等级。如果等级为0，绘制单独的轮廓。如果为1，绘制轮廓及在其后的相同的级别下轮廓  //如果值为2，所有的轮廓。如果等级为2，绘制所有同级轮廓及所有低一级轮廓，诸此种种  //如果值为负数，函数不绘制同级轮廓，但会升序绘制直到级别为abs(max_level)-1的子轮廓  cvDrawContours(dst, contour, color, color, -1, 1, 8); //绘制外部和内部的轮廓 }   contour = _contour; int count = 0; for(; contour != 0; contour = contour->h_next) {    count++;  double tmparea = fabs(cvContourArea(contour));  if (tmparea == maxarea)    {     CvScalar color = CV_RGB( 255, 0, 0);   cvDrawContours(dst, contour, color, color, -1, 1, 8);  }   }   printf("The total number of contours is:%d", count); cvNamedWindow("Components", 1); cvShowImage("Components", dst); cvWaitKey(0); cvDestroyWindow("Source"); cvReleaseImage(&src); cvDestroyWindow("Components"); cvReleaseImage(&dst); return 0;}