Needs IFF software, too.
The links that kgb provides to YouTube indicate that the latest software from their project does do that. Although I don't know that it can differentiate people. I think the best it can do is animals vs. people. Or maybe large animals (unwanted cats) vs. small animals (songbirds) etc.
Although I think if the system just has a scoring metric overall for the targeted object in the pixel deltas, perhaps a simple retroreflective patch that lights up brightly in IR would suffice, anything with the bright spots does not get shot. (maybe sleeves and legs for a gait pattern etc.)
The thing that really sucks is that the ATF deems
any motorized manipulation of a sear or trigger to be "Fully Automatic" per the NFA.
![sad =(](http://www.armedpolitesociety.com/Smileys/default/sad.gif)
A few of the cheap Romanian AK pistols with drum magazines would be a great force multiplier for the lone homesteader come SHTF.
![Evil >:D](http://www.armedpolitesociety.com/Smileys/default/evil.gif)