Human performance on individual images.

(a) Predicted probability of being an occlusion edge by the AO (blue curve). Image patches are sorted by their probability. Actual category is indicated by a (+). (b) Occlusion probability predicted by the AO for each occlusion edge (green curve) and each shadow edge (magenta curve), sorted by occlusion probability. (c) Patches of each actual category which are most likely classified as human observers as the predicted category for QT-2.