如何从dlib的array2d<rgb_pixel>镜像上创建cv::Mat？

dlib::array2d<dlib::rgb_pixel> dlibImage; // 假设已经有了dlib的array2d<rgb_pixel>图像
cv::Mat cvImage(dlibImage.nr(), dlibImage.nc(), CV_8UC3, cv::Scalar(0));
for (long r = 0; r < dlibImage.nr(); ++r) {
    for (long c = 0; c < dlibImage.nc(); ++c) {
        const dlib::rgb_pixel& dlibPixel = dlibImage[r][c];
        cv::Vec3b& cvPixel = cvImage.at<cv::Vec3b>(r, c);
        cvPixel[0] = dlibPixel.blue;
        cvPixel[1] = dlibPixel.green;
        cvPixel[2] = dlibPixel.red;
    }
}

cv::Mat mirroredImage;
cv::flip(cvImage, mirroredImage, 1);