OpenCV之键盘控制图片放大缩小之乱来版

#include "mainwindow.h"
#include <QApplication>
#include <opencv2/imgproc.hpp>
#include <opencv2/highgui.hpp>
#include <opencv2/opencv.hpp>
using namespace cv;
using namespace std;
#define WINDOW_NAME "[图像]"
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    system("chcp 65001");

    String imgpath = "F:\\MyCode\\dcq.jpg";
    Mat srcImage = imread(imgpath, 1);  // Mat tmpImage = srcImage;
    if(!srcImage.data){printf("读取失败");return -1;}
    resize(srcImage, srcImage, Size(250, 125));
    namedWindow(WINDOW_NAME, WINDOW_AUTOSIZE);
    imshow(WINDOW_NAME, srcImage);

    int key = 0;
    Mat dstImage1 ;
    while(1)
    {
        key = waitKey(9);  //读取键值到key种
        switch(key)
        {
            case 27: //ESC
                return 0;
            break;

            case 'q': //键值Q
                return 0;
            break;

            case 'a':
               pyrUp(srcImage, dstImage1, Size(srcImage.cols*2, srcImage.rows*2));
               printf("pyrUp图像尺寸*2");
               imshow("pyrUp", dstImage1);
               break;

            case 'w':
               resize(srcImage, dstImage1, Size(srcImage.cols*2, srcImage.rows*2), INTER_LINEAR);
               printf("pyrUp图像尺寸*2");
               imshow("pyrUp", dstImage1);
               break;
            case '1':
                resize(dstImage1, dstImage1, Size(dstImage1.cols*1.2, dstImage1.rows*1.2), INTER_LINEAR);
                printf("pyrUp图像尺寸*2");
                imshow("resize", dstImage1);
                break;



            case 'd':
                resize(srcImage, dstImage1, Size(dstImage1.cols/2, dstImage1.rows/2));
                imshow("sXresize", dstImage1);
                break;
           case 's':
               pyrDown(dstImage1, dstImage1, Size(dstImage1.cols/2, dstImage1.rows/2));
               imshow("sXresize", dstImage1);
                break;
        }
    }




    pyrDown(srcImage, dstImage1, Size(srcImage.cols/2, srcImage.rows/2));
    imshow("pyrDown", dstImage1);
    return a.exec();
}