使用OPENCV图像处理库，拉伸图像扩大分辨率
复制代码 代码如下:
//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;
}