Flow needed for image recognition

Ok - what I want is a flow that can look at the image from my Centauri Carbon webcam and determine if there is a previous print still sittng on the bed. In my mind, this would seem to be a useful job for an Awful Idiot piece of image recognition software. I view whats going on via an IP address http://192.168.0.184/network-device-manager/network/control and this what it shows when nothing is lying on the bed so in my mind, all it has to do is detect a small (configurable) difference from...