基于opencv的prydown&&Canny

#include<cstdio>
#include "tool.h"
#include "cv.h"
#include "highgui.h"

#include<opencv2/core/core.hpp>

#include<opencv2/imgproc/imgproc.hpp>

#include<opencv2/highgui/highgui.hpp>
using namespace std;
using namespace cv;
int main()
{
	cvNamedWindow("dog", CV_WINDOW_AUTOSIZE);
	IplImage * dog = cvLoadImage("..//..//dog.bmp");
	cvShowImage("dog", dog);
	cvWaitKey(0);
	//cvReleaseImage(&dog);

	IplImage *out = cvCreateImage(cvGetSize(dog), IPL_DEPTH_8U, dog->nChannels);
	out = doPyrDown(dog, CV_GAUSSIAN_5x5);
	IplImage * dog_gray = cvCreateImage(CvSize(dog->width/2, dog->height/2), IPL_DEPTH_8U, 1);
	cvCvtColor(out, dog_gray, CV_RGB2GRAY);
    dog_gray = doCanny(dog_gray, 10, 100, 3);
	cvShowImage("dog", dog_gray);
	cvWaitKey(0);

	Mat res = cvarrToMat(dog_gray);
	cv::imwrite("..//..//dog_prydown_canny.bmp", res);

    cvReleaseImage(&dog_gray);
	cvReleaseImage(&out);
	cvDestroyWindow("dog");
	return 0;
}


#pragma once
#include "cv.h"
#include "highgui.h"
/*缩小到原来的二分之一*/
IplImage * doPyrDown(IplImage * in, int  fiter = CV_GAUSSIAN_5x5) {
	//Best make sure the src image can be divised by two
	/*不满足in->width %2==0 && in->height % 2 == 0则cpp结束*/
	assert(in->width %2==0 && in->height % 2 == 0);

	IplImage* out = cvCreateImage(cvSize(in->width/2,in->height/2), IPL_DEPTH_8U, in->nChannels);
	cvPyrDown(in, out, fiter);

	return out;
}
/*描边函数，只限灰度图像*/
IplImage * doCanny(IplImage * in, double lowThresh, double highThresh, double aperture) {
	if (in->nChannels != 1)
		return 0;
	IplImage *out = cvCreateImage(CvSize(cvGetSize(in)), IPL_DEPTH_8U, in->nChannels);
	cvCanny(in, out, lowThresh, highThresh, aperture);
	return out;
}