classify or recognize if I see a mouth in the image the eyes ears and nose if I see all of those things then maybe I can say that there's a face in that image but then the question is okay but how do I recognize each of those sub things like how do I recognize an eye how do I recognize a mouth and then you have to decompose that into okay to recognize a mouth I maybe have to recognize these pairs of lines oriented lines in a certain direction certain orientation and then it keeps getting more complicated and each of these steps you