核心函数：cvPyrDown，cvPyrUp

程序：

代码：

#include "cv.h"#include "cxcore.h"#include "highgui.h"#include 
     
      int pyr(int argc,char** argv){IplImage* src=cvLoadImage("e:\\picture\\xibao.jpg");IplImage* dst1=cvCreateImage(cvSize(src->width/2,src->height/2),src->depth,src->nChannels);IplImage* dst2=cvCreateImage(cvSize(src->width*2,src->height*2),src->depth,src->nChannels);cvPyrDown(src,dst1,CV_GAUSSIAN_5x5);cvPyrUp(src,dst2,CV_GAUSSIAN_5x5);cvNamedWindow("src");cvNamedWindow("PyrDown");cvNamedWindow("PyrUp");cvShowImage("src",src);cvShowImage("PyrDown",dst1);cvShowImage("PyrUp",dst2);std::cout<
      
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