基于hough原理 opencv的线与圆的检测

#include "stdafx.h"
#include <iostream>

#include <cv.h>
#include <cxcore.h>
#include <highgui.h>
#include <math.h>
using namespace std;
/*
coded and updated by Huang, Haiqiao 2010-01-13
Examples of using cvHoughLines2 and cvHoughCircles
*/

int main(int argc, char** argv)
{
   int i;
   //cout << "Lines and Circles OpenCV!"<<endl;  //\\cameraman.jpg
   //char* filename="D:\\OpenCV_stuff\\SampleImages\\pattern512.bmp";
   IplImage* imgRGB = cvLoadImage(filename); 
   IplImage* imgGrey = cvLoadImage(filename,0); //grey image
   char* filename1="D:\\OpenCV_stuff\\SampleImages\\circle3.jpg";
   IplImage* imgcircle = cvLoadImage(filename1,1); //color image
   if (imgGrey==NULL){
      cout << "No valid image input."<<endl; 
      char c=getchar();
      return 1;
   } 
   
   IplImage* cannyImg  = cvCreateImage(cvSize(imgGrey->width,imgGrey->height),IPL_DEPTH_8U,1);
   cvCanny(imgGrey,cannyImg,170,200,3);