【OpenCV学习】角点检测

作者：gnuhpc
出处：http://www.cnblogs.com/gnuhpc/

#include <stdio.h>

#include "cv.h"

#include "highgui.h"



#define MAX_CORNERS 100



int main(void)

{

int cornersCount=MAX_CORNERS;//得到的角点数目

CvPoint2D32f corners[MAX_CORNERS];//输出角点集合

IplImage *srcImage = 0,*grayImage = 0,*corners1 = 0,*corners2 = 0;

int i;

CvScalar color = CV_RGB(255,0,0);

char *filename = "pic3.png";

cvNamedWindow("image",1);



//Load the image to be processed

srcImage = cvLoadImage(filename,1);

grayImage = cvCreateImage(cvGetSize(srcImage),IPL_DEPTH_8U,1);



//copy the source image to copy image after converting the format

//复制并转为灰度图像

cvCvtColor(srcImage,grayImage,CV_BGR2GRAY);



//create empty images os same size as the copied images

//两幅临时32位浮点图像，cvGoodFeaturesToTrack会用到

corners1 = cvCreateImage(cvGetSize(srcImage),IPL_DEPTH_32F,1);

corners2 = cvCreateImage(cvGetSize(srcImage),IPL_DEPTH_32F,1);



cvGoodFeaturesToTrack(grayImage,corners1,

corners2,corners,

&cornersCount,0.05,

30,//角点的最小距离是30

0,//整个图像

3,0,0.4);

//默认值

printf("num corners found: %d/n",cornersCount);



//开始画出每个点

if (cornersCount>0)

{

for (i=0;i<cornersCount;i++)

{

cvCircle(srcImage,cvPoint((int)(corners[i].x),(int)(corners[i].y)),

2,color,2,CV_AA,0);

}

}



cvShowImage("image",srcImage);

cvSaveImage("imagedst.png",srcImage);



cvReleaseImage(&srcImage);

cvReleaseImage(&grayImage);

cvReleaseImage(&corners1);

cvReleaseImage(&corners2);



cvWaitKey(0);

return 0;

} 

作者：gnuhpc
出处：http://www.cnblogs.com/gnuhpc/