It really is about the way it's inputted into the system, again. I worked on biometric standards for about 10 years actually and it was interesting. There was always discussion about the input into the system and taking a fingerprint and putting the fingerprint in. There was always a discussion about liveness detection, but really, your input system should have a means to identify whether or not it's a live biometric. Liveness is really about a biometric, so it is increasingly complex to figure out how to accurately get the information in that isn't spoofed. It's not just a static fingerprint.
You see it in some of the face recognition algorithms. The input is that there's actually a request for you to do different things, like smile, turn your head, look down or close your eyes. There are increasingly harder ways to actually get the input.