opencv图片旋转90度

#include<iostream>

#include <opencv2/opencv.hpp>

using namespace std;

using namespace cv;

int test1()

{

    Mat img1, img2,img3;

    img2 = cv::Mat(, ,CV_8UC3);

    img1 = imread("D://images//opencv测试图片//190.jpg");

    if (img1.empty())

    {

        return -;

    }

    int width1 = img1.rows;

    int height1 = img1.cols;

    std::cout << "w:" << width1 << "     h1:" << height1<<std::endl;

    double angle = 90.0;  //角度

    double scale = 1.0;  //缩放系数

    cv::transpose(img1, img2);

    cv::flip(img2, img2, );

    int width2 = img2.rows;

    int height2 = img2.cols;

    std::cout << "w:" << width2 << "     h1:" << height2 << std::endl;

    imshow("win1", img1);

    imshow("win2", img2);

    imwrite("D://images//opencv测试图片//img2019091902.jpg", img2);

    return ;

}

int main()

{

    test1();

    waitKey();

    return ;

}