2.1 Supervised Learning and Neural Networks
Imagine we are building a security system for a new hi-tech building. We would like to
build in a face-recognition system, so the building can choose whether to admit or not
admit certain personnel to a top secret area when they arrive at the door. The problem
is, a person naturally changes their appearance from day to day; how can our system make
allowances for this? Also, if we have several members of staff, how are we going to create the
system in the first place? It is not a desirable prospect to sit for many hours meticulously
describing each member of staff to the computer system. An alternative would be to provide
example pictures of the staff members, and have it learn for itself what they look like, and