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;}