@Article{Howe2005,
  author   = {Catherine Q Howe and Zhiyong Yang and Dale Purves},
  journal  = {Proc Natl Acad Sci U S A},
  title    = {The {P}oggendorff illusion explained by natural scene geometry.},
  year     = {2005},
  number   = {21},
  pages    = {7707-12},
  volume   = {102},
  abstract = {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.},
  doi      = {10.1073/pnas.0502893102},
  keywords = {Comparative Study, Databases, Extramural, Factual, Humans, Models, N.I.H., Non-P.H.S., Non-U.S. Gov't, Optical Illusions, P.H.S., Psychological, Research Support, U.S. Gov't, Visual Perception, 15888555},
}

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