//缩放图像文件
#include
using namespace std;
//隐藏控制台窗口
#pragma comment(linker, "/subsystem:"windows" /entry:"mainCRTStartup"")
int main()
{
 const char *pstrImageName = "airplane.jpg";
 const char *pstrSaveImageName = "airplane缩放图.jpg";
 const char *pstrWindowsSrcTitle = "原图";
 const char *pstrWindowsDstTitle = "缩放图";

 double fScale = 2;//缩放倍数
 CvSize czSize; //目标图像尺寸

 //从文件中读取图像 
 IplImage *pSrcImage = cvLoadImage(pstrImageName, CV_LOAD_IMAGE_UNCHANGED);
 IplImage *pDstImage = NULL; 

 //计算目标图像大小
 czSize.width = pSrcImage->width * fScale;
 czSize.height = pSrcImage->height * fScale;

 //创建图像并缩放
 pDstImage = cvCreateImage(czSize, pSrcImage->depth, pSrcImage->nChannels);
 cvResize(pSrcImage, pDstImage, CV_INTER_AREA);
 

 //创建窗口
 cvNamedWindow(pstrWindowsSrcTitle, CV_WINDOW_AUTOSIZE);
 cvNamedWindow(pstrWindowsDstTitle, CV_WINDOW_AUTOSIZE);

 //在指定窗口中显示图像
 cvShowImage(pstrWindowsSrcTitle, pSrcImage);
 cvShowImage(pstrWindowsDstTitle, pDstImage);

 //等待按键事件
 cvWaitKey();

 //保存图片
 cvSaveImage(pstrSaveImageName, pDstImage);

 cvDestroyWindow(pstrWindowsSrcTitle);
 cvDestroyWindow(pstrWindowsDstTitle);
 cvReleaseImage(&pSrcImage);
 cvReleaseImage(&pDstImage);
 return 0;
}