This is a typical slashdot comment. Uninformed, belittles others work. Symmetry might work in some pictures. It might not work in others. Besides, the feature extraction needed to establish symmetry is non trivial (its the same as what the author of the paper does). If this was so trivial, why didn't you build a system like this. The world belongs to the doers, not the "Ah, I told you so" crowd.