ps: sorry for the repost, forgot to log-in beforehand.
There is no way they can recognize 300 objects in real world conditions. I work in machine learning (academics) and the current record for generic object recognition sits at around 54-57% for the Caltech 101 database (contains images of 101 different objects). So basically the algorithms of the best and brightest minds in academia (LeCun, Poggio, Lowe, etc) get it wrong half the time !!
If any government officials are listening... Please don't waste our tax money on this !