Verybot之OpenCV应用二：霍夫变换查找圆

来源：互联网发布：丰田世纪知乎编辑：程序博客网时间：2024/05/16 15:57

其实我是想通过这个程序来测试一下，OpenCV在Verybot上跑得怎么样，霍夫变换的原理就不多说了，下面是程序：

#include "cv.h"#include "highgui.h"#include "stdio.h"int main(int argc, char** argv){    cvNamedWindow("vedio",0);    CvCapture* capture;    if(1 == argc)    {        capture = cvCreateCameraCapture(0);    }    else    {        capture = cvCreateCameraCapture(atoi(argv[1]));    }    assert(NULL != capture);cvSetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH, 320);cvSetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT,240);    IplImage* frame;char keyCode;frame = cvQueryFrame(capture);    if(!frame)    {        return 0;    }    IplImage* gray = cvCreateImage( cvGetSize(frame), 8, 1 );    //创建一个Image用来存灰度的图像CvMemStorage* storage = cvCreateMemStorage(0);            while((keyCode = cvWaitKey(15)))    {        if(keyCode == 'q'){break;}        frame = cvQueryFrame(capture);        if(!frame)        {            break;        }        cvCvtColor( frame, gray, CV_BGR2GRAY );        CvSeq* circles = cvHoughCircles( gray, storage, CV_HOUGH_GRADIENT, 2, gray->height/4,200,200,20 );    //霍夫变换查找圆int i=0;for( i = 0; i < circles->total; i++ )        //将找到的圆标识出来        {             float* p = (float*)cvGetSeqElem( circles, i );  cvCircle( frame, cvPoint(cvRound(p[0]),cvRound(p[1])), cvRound(p[2]), CV_RGB(255,0,0),3); printf("%d  ,%d  ,%d\n",cvRound(p[0]),cvRound(p[1]),cvRound(p[2]));        }        cvShowImage("vedio",frame);    }    cvReleaseImage(&frame);    cvDestroyAllWindows();    return 0;}

程序比较简单，cvHoughCircles就是查找圆所使用的函数，后面的这几个参数比较重要，需要根据实际情况进行调整，调整不好的话，会误检测出圆来。

测试的效果感觉还是不错的，下面是一个检测的录像：

http://v.youku.com/v_show/id_XNjYxNjkzNDMy.html

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