Hi Asus, as from my knowlege there are implemented many research results on this matter. AGI cannot and will not explain indepht how it works, because they could give hints to other sw solutions and they could implement it. From what im hear from industry experts they have one of the best models of camera descriptions. it works even on film scans, where is the black frame, scanned from analog camera and it works...... there is most importraint to know how to shoot and let it to the sw internall subroutines. many people using it, and happy with robustness, speed and easy of getting good results....