Is the Human visual sytem optimised for encoding the statistical information of natural scenes?

@PhdThesis\{Par2003,
  author       = "C. Alejandro Parraga",
  title        = "Is the Human visual sytem optimised for encoding the statistical information of natural scenes?",
  school       = "University of Bristol, England",
  year         = "2003",
  address      = "Bristol (England)",
  url          = "http://www.cat.uab.cat/Public/Publications/2003/Par2003"
}