Unmanned Aerial Vehicles, better known as drones, have become an eye in the sky to aid men with a perspective from above. They provide real-time, high-resolution imagery at low cost. Originally thought for military applications, UAVs have found their way into mainstream usage thanks to the enhanced levels of safety and efficiency they bring. Robotic UAVs operate without an onboard pilot; the trend is of continuous evolution with an ever increasing level of automation. On the other side, Artificial Neural Networks lead the cutting-edge machine learning techniques, whose purpose is to render machines more and more intelligent by means of bio-inspired models.