角点检测(corner detection)的源代码（需要OPENCV库的支持）

这是在 Ruadhan 提供的源代码基础上做了一些修改，可以检测图像中的角点。应用环境是：OPENCV BETA 4，VC6 编译运行通过。

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#include <stdio.h>
#include "cv.h"
#include "highgui.h"
#define max_corners 100

int main( int argc, char** argv )
{
    int cornerCount=max_corners;
    CvPoint2D32f corners[max_corners];
    double qualityLevel;
    double minDistance;
    IplImage *srcImage = 0, *grayImage = 0, *corners1 = 0, *corners2 = 0;
    int i;
    CvScalar color = CV_RGB(255,0,0);
   
    cvNamedWindow( "image", 1 ); // create HighGUI window with name "image"
   
    //Load the image to be processed
    srcImage = cvLoadImage("..//..//c//pic3.png", 1);
   
    grayImage = cvCreateImage(cvGetSize(srcImage), IPL_DEPTH_8U, 1);
   
    //copy the source image to copy image after converting the format
    cvCvtColor(srcImage, grayImage, CV_BGR2GRAY);
   
    //create empty images of same size as the copied images
    corners1= cvCreateImage(cvGetSize(srcImage), IPL_DEPTH_32F, 1);
    corners2= cvCreateImage(cvGetSize(srcImage),IPL_DEPTH_32F, 1);
   
    cvGoodFeaturesToTrack (grayImage, corners1, corners2, corners,
        &cornerCount, 0.05, 5, 0);
   
    printf("num corners found: %d\n", cornerCount);
   
    // draw circles at each corner location in the gray image and
    // print out a list the corners
    if(cornerCount>0)
    {
        for (i=0; i<cornerCount; i++)
        {
            cvCircle(srcImage, cvPoint((int)(corners[i].x), (int)(corners[i].y)), 6,
                color, 2, CV_AA, 0);
        }
    }
   
    cvShowImage( "image", srcImage );
   
    cvReleaseImage(&srcImage);
    cvReleaseImage(&grayImage);
    cvReleaseImage(&corners1);
    cvReleaseImage(&corners2);
   
    cvWaitKey(0); // wait for key. The function has
    return 0;
}

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