[OpenCV] read image

cv::Mat imread_limitedWidth(cv::String filename, int length_limit, int imread_flag)
{
    // Load an image
    cv::Mat image = imread(filename, imread_flag);

    if (image.empty())
    {
        std::cerr << "Cannot open image" << std::endl;
        return image;
    }

    // Resize if image length is bigger than 10000 px
    if (image.rows > 1000 | image.cols > 1000)
    {
        std::cout << "imread_resize:: Limit the image size to 1000 px in length" << std::endl;
        double fx = length_limit / static_cast<double>(image.cols);
        double newHeight = static_cast<double>(image.rows) * fx;
        double fy = newHeight / image.rows;
        cv::resize(image, image, cv::Size(0, 0), fx, fy);
    }

    return image;
}