The Poggendorff illusion explained by natural scene geometry.

One of the most intriguing of the many discrepancies between perceived spatial relationships and the physical structure of visual stimuli is the Poggendorff illusion, when an obliquely oriented line that is interrupted no longer appears collinear. Although many different theories have been proposed to explain this effect, there has been no consensus about its cause. Here, we use a database of range images (i.e., images that include the distance from the image plane of every pixel in the scene) to show that the probability distribution of the possible locations of line segments across an interval in natural environments can fully account for all of the behavior of this otherwise puzzling phenomenon.

[1]  Julian Hochberg,et al.  Perception and cognition at century's end , 1998 .

[2]  R H Day,et al.  The components of the Poggendorff illusion. , 1976, British journal of psychology.

[3]  Dale Purves,et al.  Natural-scene geometry predicts the perception of angles and line orientation. , 2005, Proceedings of the National Academy of Sciences of the United States of America.

[4]  B. Burns,et al.  Geometrical illusions and the response of neurones in the cat's visual cortex to angle patterns , 1971, The Journal of physiology.

[5]  H. Leibowitz,et al.  The effect of rotation and tilt on the magnitude of the Poggendorf illusion. , 1966, Vision research.

[6]  D. Purves,et al.  Size Contrast and Assimilation Explained by the Statistics of Natural Scene Geometry , 2004, Journal of Cognitive Neuroscience.

[7]  Dale Purves,et al.  Range image statistics can explain the anomalous perception of length , 2002, Proceedings of the National Academy of Sciences of the United States of America.

[8]  Dale Purves,et al.  A statistical explanation of visual space , 2003, Nature Neuroscience.

[9]  D. Purves,et al.  Why we see what we do : an empirical theory of vision , 2003 .

[10]  C. Blakemore,et al.  Lateral Inhibition between Orientation Detectors in the Human Visual System , 1970, Nature.

[11]  Dale Purves,et al.  Image/source statistics of surfaces in natural scenes , 2003, Network.

[12]  Rajesh P. N. Rao,et al.  Probabilistic Models of the Brain: Perception and Neural Function , 2002 .

[13]  David H. Krantz,et al.  The Poggendorff illusion: Amputations, rotations, and other perturbations , 1971 .

[14]  R. Day.  The Poggendorff illusion with obtuse and acute angles , 1973 .

[15]  B. Gillam,et al.  Perception and Cognition at Century''s End , 1998 .

[16]  H. Ridley.  Eye and Brain , 1973 .

[17]  B. Gillam.  A depth processing theory of the Poggendorff illusion , 1971 .

[18]  J. O. Robinson.  The Psychology of Visual Illusion , 1972 .

[19]  R. Gregory,et al.  Distortion of Visual Space as Inappropriate Constancy Scaling , 1963, Nature.