#include?“cv.h“
#include?“highgui.h“

int?slider_pos?=?70;

IplImage?*image02?=?0?*image03?=?0?*image04?=?0;
void?process_image（int?h）;

int?main（?int?argc?char**?argv?）
{
????const?char*?filename?=?argc?==?2???argv[1]?:?（char*）“stuff.jpg“;
????
????//?讀入圖像，強制為灰度圖像
????if（?（image03?=?cvLoadImage（filename?0））?==?0?）
????????return?-1;

????//?Create?the?destination?images
????image02?=?cvCloneImage（?image03?）;
????image04?=?cvCloneImage（?image03?）;

????//?Create?windows.
????cvNamedWindow（“Source“?1）;
????cvNamedWindow（“Result“?1）;

????//?Show?the?image.
????cvShowImage（“Source“?image03）;

????//?Create?toolbars.?HighGUI?use.
????cvCreateTrackbar（?“Threshold“?“Result“?&slider_pos?255?process_image?）;

????process_image（0）;

????//?Wait?for?a?key?stroke;?the?same?function?arranges?events?processing????????????????
????cvWaitKey（0）;
????cvReleaseImage（&image02）;
????cvReleaseImage（&image03）;

????cvDestroyWindow（“Source“）;
????cvDestroyWindow（“Result“）;

????return?0;
}

//?Define?trackbar?callback?functon.?This?function?find?contours
//?draw?it?and?approximate?it?by?ellipses.
void?process_image（int?h）
{
????CvMemStorage*?stor;
????CvSeq*?cont;
????CvBox2D32f*?box;
????CvPoint*?PointArray;
????CvPoint2D32f*?PointArray2D32f;
????
????//?創(chuàng)建動態(tài)結(jié)構(gòu)序列
????stor?=?cvCreateMemStorage（0）;
????cont?=?cvCreateSeq（CV_SEQ_ELTYPE_POINT?sizeof（CvSeq）?sizeof（CvPoint）??stor）;
????
????//?二值話圖像.
????cvThreshold（?image03?image02?slider_pos?255?CV_THRESH_BINARY?）;
????
????//?尋找所有輪廓.
????cvFindContours（?image02?stor?&cont?sizeof（CvContour）?
????????????????????CV_RETR_LIST?CV_CHAIN_APPROX_NONE?cvPoint（00））;
????
????//?Clear?images.?IPL?use.
????cvZero（image02）;
????cvZero（image04）;
????
????//?本循環(huán)繪制所有輪廓并用橢圓擬合.
????for（;cont;cont?=?cont->h_next）
????{???
????????int?i;?//?Indicator?of?cycle.
????????int?count?=?cont->total;?//?This?is?number?point?in?contour
????????CvPoint?center;
????????CvSize?size;
????????
????????//?Number?point?must?be?more?than?or?equal?to?6?（for?cvFitEllipse_32f）.????????
????????if（?count?????????????continue;
????????
????????//?Alloc?memory?for?contour?point?set.????
????????PointArray?=?（CvPoint*）malloc（?count*sizeof（CvPoint）?）;
????????PointArray2D32f=?（CvPoint2D32f*）malloc（?count*sizeof（CvPoint2D32f）?）;
????????
????????//?Alloc?memory?for?ellipse?data.
????????box?=?（CvBox2D32f*）malloc（sizeof（CvBox2D32f））;
????????
????????//?Get?contour?point?set.
????????cvCvtSeqToArray（cont?PointArray?CV_WHOLE_SEQ）;
????????
????????//?Convert?CvPoint?set?to?CvBox2D32f?set.
????????for（i=0;?i????????{
????????????PointArray2D32f[i].x?=?（float）PointArray[i].x;
????????????PointArray2D32f[i].y?=?（float）PointArray[i].y;
????????}
????????
????????//擬合當(dāng)前輪廓.
????????cvFitEllipse（PointArray2D32f?count?box）;
????????
????????//?繪制當(dāng)前輪廓.
????????cvDrawContours（image04contCV_RGB（255255255）
CV_RGB（255255255）018cvPoint（00））;
????????
????????//?Convert?ellipse?data?from?float?to?integer?representation.

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????8238??2007-02-24?14:57??例5-17\circles.png

?????文件???????3647??2007-02-24?14:56??例5-17\fitellipse.c

?????文件???????4196??2007-03-07?20:41??例5-17\fitellipse.dsp

?????文件????????545??2007-03-07?20:41??例5-17\fitellipse.dsw

?????文件????????138??2007-02-24?15:10??例5-17\Makefile

?????文件??????44521??2007-03-07?22:17??例5-17\rice.png

?????目錄??????????0??2008-10-21?09:23??例5-17

?????文件????????440??2011-07-24?18:56??快捷方式?到?EPSnap.exe.lnk

-----------?---------??----------?-----??----

????????????????61943????????????????????9