Psychophysics: Putting plaids in perspective

Farell has described a “new view” of the stereo-matching problem. He claimed that occlusion relationships in natural scenes introduce interocular positional shifts in all two-dimensional (2D) directions, which putatively demonstrates that “horizontal disparity is not a reliable cue to depth” in natural scenes. Farell argued that the visual system must therefore search locally in all 2D directions to establish correspondence.