#25 Alternative of Image_window in dlib?

[aero dactyl]

Hi Davis,
I am new to dlib , and I have used the face_landmark.cpp in my c++ . So in dlib we are using dlib::Image_window in which we are adding the image and overlaying the all the dects (vector points). In this process new Image window is getting pop up, which i dont want.
Is there any alternative of Image_window through which I can do the same process then convert it into cv::Mat Image ??