OpenCV --- 实现两幅图像并排合并（ROI）

　　 Mat img1 = imread("1.png");

    Mat img2 = imread("2.png");

    int height = img1.rows;

    int width1 = img1.cols;

    int width2 = img2.cols;

    // 将高图像等比缩放与低图像高度一致

    if (img1.rows > img2.rows)

    {

        height = img2.rows;

        width1 = img1.cols * ((float)img2.rows / (float)img1.rows);

        resize(img1, img1, Size(width1, height));

    }

    else if(img1.rows < img2.rows)

    {

        width2 = img2.cols * ((float)img1.rows / (float)img2.rows);

        resize(img2, img2, Size(width2, height));

    }

    //创建目标Mat

    Mat des;

    des.create(height, width1 + width2, img1.type());

    Mat r1 = des(Rect(, , width1, height));

    img1.copyTo(r1);

    Mat r2 = des(Rect(width1, , width2, height));

    img2.copyTo(r2);

    namedWindow("des");

    imshow("des", des);