边缘检测算法及图像金字塔

#include"highGUI.h"#include"cv.h"IplImage *doPyrDown(IplImage *in, int filter = IPL_GAUSSIAN_5x5){assert(in->width % 2 == 0 && in->height % 2 == 0);IplImage *out = cvCreateImage(cvSize(in->width / 2, in->height / 2), in->depth, in->nChannels);//新图像是从旧图像中读取信息cvPyrDown(in, out);//用Gaussian金字塔分解对输入图像向下采样。return (out);}int main(int argc, char *argv[]){IplImage *in = cvLoadImage("D:\\3.jpg");//第二个参数设为0的作用是将图片转化为灰色cvNamedWindow("show", CV_WINDOW_AUTOSIZE);cvShowImage("show", in);cvNamedWindow("win2", CV_WINDOW_AUTOSIZE);IplImage *out = cvCreateImage(cvGetSize(in), IPL_DEPTH_8U, 1);//写入单通道图像cvCanny(in, out, 50, 150, 3);//边缘检测算法cvShowImage("win2", out);//IplImage *out = doPyrDown(in);cvWaitKey(0);cvReleaseImage(&in);cvReleaseImage(&out);cvDestroyWindow("show");cvDestroyWindow("win2");}