#include
#include
#include
#include
usingnamespacestd;
#pragmacomment(lib,"cv.lib")
#pragmacomment(lib,"highgui.lib")
#pragmacomment(lib,"cxcore.lib")
intmain()
{
IplImage*src=cvLoadImage("D:\\三值canny的图.bmp",0);
//IplImage*src=cvLoadImage("D:\\BoardStereoL3.jpg",0);
CvMemStorage*storage=cvCreateMemStorage();//创建一个内存区域,该区域是额可以动态增长的
CvSeq*seq=NULL;//定义一个序列,这些序列可以存放在上面的内存区域里
intcnt=cvFindContours(src,storage,&seq,sizeof(CvContour),2);//////默认:mode=CV_RETR_LIST,检索所偶轮廓
seq=seq->v_next;
intc=seq->total;//当前轮廓包含多少个元素,这里的元素为点
doublelength=cvArcLength(seq);//得到指定的那个轮廓的周长
//该函数有3个参数:序列,起点(默认计算整条曲线),是否封闭曲线
doublearea=cvContourArea(seq);//得到指定的那个轮廓的面积
CvRectrect=cvBoundingRect(seq,1);//根据序列,返回轮廓外围矩形;
CvBox2Dbox=cvMinAreaRect2(seq,NULL);//最小外围矩形
cout<
cout<
CvPointpt1,pt2;
pt1.x=rect.x;
pt1.y=rect.y;
pt2.x=rect.x+rect.width;
pt2.y=rect.y+rect.height;
IplImage*dst=cvCreateImage(cvGetSize(src),8,3);//目标图像为3通道图
cvZero(dst);
cvDrawContours(dst,seq,CV_RGB(255,0,0),CV_RGB(255,0,0),0);
cvRectangle(dst,pt1,pt2,CV_RGB(0,255,0));
cvNamedWindow("dst",1);
cvShowImage("dst",dst);
cvWaitKey();
CvPoint2D32fcenter;
floatradius;
inta=cvMinEnclosingCircle(seq,¢er,&radius);//根据序列画出最小面积外接圆
cout<
cout<
cout<
//圆必须是包含所有点,成功返回1,并且得到圆心和半径
cvCircle(dst,cvPointFrom32f(center),cvRound(radius),CV_RGB(100,100,100));
cvShowImage("dst",dst);
cvWaitKey();
CvBox2Dellipse=cvFitEllipse2(seq);//最小二乘法的椭圆拟合
cvEllipseBox(dst,ellipse,CV_RGB(255,255,0));//在图上画椭圆
cvShowImage("dst",dst);
cvWaitKey();
//绘制外接最小矩形
CvPoint2D32fpt[4];
cvBoxPoints(box,pt);
for(inti=0;i<4;++i){
cvLine(dst,cvPointFrom32f(pt[i]),cvPointFrom32f(pt[((i+1)%4)?(i+1):0]),CV_RGB(0,0,255));
}
cvShowImage("dst",dst);
cvWaitKey();
cvReleaseImage(&src);
cvReleaseImage(&dst);
cvReleaseMemStorage(&storage);
}