//缩放图像文件 #include <opencv2/opencv.hpp> 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; }