Opencv之简单的边缘检测

#include <stdio.h>
#include <highgui.h>
#include "cv.h"

IplImage *doPyrDown(IplImage *in,int filter)
{
    //assert(in->width%2==0 && in->height%2==0);
    IplImage *out= cvCreateImage(cvSize(in->width/2,in->height/2),in->depth,in->nChannels);
    cvPyrDown(in,out,filter);
    return (out);
}
IplImage * doCanny(IplImage * in, int lowThresh, int highThresh,int aperture)
{

    IplImage* imgtemp;
    imgtemp=cvCreateImage(cvGetSize(in), IPL_DEPTH_8U,1);
    IplImage* out = cvCreateImage(cvGetSize(in),IPL_DEPTH_8U,1);
    cvCvtColor(in,out,CV_RGB2GRAY);
    cvCanny(out,imgtemp,lowThresh,highThresh,aperture);
    return (imgtemp);
}
int main(int argv ,char ** argc)
{
    IplImage *img=cvLoadImage("../resource/dongqing.jpg",1);
    IplImage *out=doCanny(img,20,100,3);
    cvNamedWindow("Dongqing",CV_WINDOW_AUTOSIZE);
    cvShowImage("Dongqing",out);
    cvWaitKey(0);
    cvReleaseImage(&out);
    cvReleaseImage(&img);
    cvDestroyWindow( "Dongqing");
    return 0;
}