[muntoo]

What about people who spin in circles and think everything looks like a 0? It isn't completely random if someone is biased towards a number, especially when the picture is uncertain. A possibly better approach would be to count the number of 'splatters' (or whatever), and mod by some smaller number (i.e., 16).

[gadders]

Good point. I should probably also let people choose their own tune for extra randomness.