printmail01, you think you are so much smarter than the people at SEVU, why don't you try to patent some of these great ideas.
Do you really think that nobody at SEVU has thought about or is not testing exactly what you are asking for????
Don't you remember the system they demonstrated to the government that was able to "paint" a motion detect area thru SOFTWARE and record people walking through the door??? The reason it isn't available to you and me is the 5 figure price tag.