7. The apparatus of claim 6 , wherein the state machine of the gross change detector includes at least one of the following events: a good frame detected event; a bad frame detected event; a gross change motion event; a gross change due to lighting event; or a gross change due to a camera not moving event; wherein at least one event of the state machine results in a state change and one or more actions of the state machine.
6. The apparatus of claim 2 , wherein the gross change detector is implemented as a state machine using the at least one processor.