Hello Everyone,
I am trying to figure out the best way to detect if an object (Person's movement) has moved into a region or out of that region for example:
Region: Nothing in this area (OFF)
Region: Something moves into this area (ON)
Region: Something is still in this area (ON)
Region: Something now moves out of the area (OFF)
(I plan to have 60+ regions 
help)
PITFALLS:
Camera: I can calculate pixels but I was hoping to work on a project that was more self contained and didn't require the processing power of a computer to do this.
PIR Sensor: This will trigger on when the object moves into the region but the flaw here is the following:
Region: Nothing in this area (OFF)
Region: Something moves into this area (On)
I can program the region to stay on until item moves again...
If item did one movement in and out of region and does not come back.. this will cause the region to stay on.
Light Sensor: No bueno, The area will be fairly lit and the object (person) will not be in extremely close proximity (Will be about 3 to 8 feet away)