本文需要了解的庫函式：

void cvGoodFeaturesToTrack( const CvArr* image, CvArr* eig_image, CvArr* temp_image,
                            CvPoint2D32f* corners, int* corner_count,
                            double quality_level, double min_distance,
                            const CvArr* mask=NULL );

#include<cv.h>
#include<highgui.h>
#include<stdio.h>
#include<malloc.h>
#pragma comment(lib,"cv.lib")
#pragma comment(lib,"cxcore.lib")
#pragma comment(lib,"highgui.lib")
#pragma comment(lib,"cvaux.lib")
/********************************************************************************
*
*
*  本程式是強角點檢測演示例程
*  作者：xlh145
*  部落格:http://blog.csdn.net/xlh145/
*
*
********************************************************************************/
IplImage * image =NULL;
IplImage * gray =NULL;
IplImage * dist =NULL; //顯示影象
//下面是兩幅檢測角點的臨時影象
IplImage * eig_image =NULL;
IplImage * temp_image =NULL;

int quality_level=0; //最小質量因子
int min_distance = 40;//角點間的最小歐氏距離

void OnTrack(int )
{
	cvZero(dist);//清空影象
	cvCopy(image,dist);//拷貝原始資料
	CvPoint2D32f corners[200];//儲存角點座標 最大檢測200個點
	int count=200;//角點座標
	double level = (double)quality_level/100+0.02;
	double distance = (double)min_distance;
	cvGoodFeaturesToTrack(gray,eig_image,temp_image,
						 corners,&count,level,distance,NULL);	 //角點檢測	
		
	for(int i=0;i<count;i++)
	{
		CvPoint center;
		center.x = cvRound(corners[i].x);
		center.y = cvRound(corners[i].y);
		cvCircle(dist,center,5,CV_RGB(255,0,0),1,8,0);
	}
	 
	cvShowImage("角點",dist);
}

int main()
{
    image = cvLoadImage("2.jpg",1); //載入
	dist = cvCloneImage(image);
	gray = cvCreateImage(cvGetSize(image),IPL_DEPTH_8U,1);
	eig_image = cvCreateImage(cvGetSize(image),IPL_DEPTH_32F,1);
	temp_image = cvCreateImage(cvGetSize(image),IPL_DEPTH_32F,1);
	cvCvtColor(image,gray,CV_BGR2GRAY); //灰度轉換
	cvNamedWindow("角點",1);
	cvCreateTrackbar("quality_level","角點",&quality_level,100,OnTrack);
	cvCreateTrackbar("min_distance","角點",&min_distance,200,OnTrack);	
	OnTrack(0);
	cvWaitKey(0);
	//釋放資料
	cvReleaseImage(&image);
	cvReleaseImage(&dist);
	cvReleaseImage(&gray);
	cvReleaseImage(&eig_image);
	cvReleaseImage(&temp_image);

	cvDestroyWindow("角點");

	return 0;
}