Years ago, the only way to recognize who was knocking at your door, without being too obvious, was through a little peephole near the top of the door. Observant visitors would notice the light disappear from the peephole once a face was pressed up against it on the other side. So, in other words, we really weren't fooling anyone into thinking we weren't home if we decided that the visitor was not worthy of us opening the door. Times have certainly changed. We have the technology now to filter unwanted visitors for us without being detected. Using a camera and visual recognition algorithms on the sensory side, we will design an edge analytics application that alerts us to who is at the door. We won't even have to get up.
In this chapter, we will build a Smart Doorbell using a facial recognition library and a Raspberry...
