dlib::array2d<unsigned char> 与 cv::Mat 互转

dlib::array2d is an image already, you can use it for any dlib's image functionsload image:dlib::array2d<dlib::rgb_pixel> img_rgb;dlib::load_image(img_rgb, "test_image.jpg");convert to greyscale:dlib::array2d<unsigned char> img_gray;dlib::assign_image(img_gray, img_rgb);converto to OpenCV Image (cv::Mat):#include <dlib/opencv.h>#include <opencv2/opencv.hpp>cv::Mat img = dlib::toMat(img_gray);get image from OpenCV:#include <dlib/opencv.h>#include <opencv2/opencv.hpp>cv::Mat img = cv::imread("test_image.jpg")dlib::cv_image<rgb_pixel> dlib_img(img); // only stores pointer, no deep copyDocumentation is here. There are a lot of well-documented examples, you should start from them. Special example about array2d