It is a Python script that able to mark human face's and draw lines on it. With this, you can develop face recognition algorithms.
You just need shape_predictor_68_face_landmarks.dat . dlib needs this.
If you downloaded shape_predictor_68_face_landmarks.dat, you can start. If you want to try on images, you must type path of image folder to 'PATH' variable on line 364 and mark 'on_cam()' as a comment line on line 419. But if you want to try on your webcam, you must mark 'on_path(PATH)' as a comment line on line 418. Then you are ready to start!
If you have any question, don't shame to ask.