title: Draughtsmen at work.
abstract: To obtain the representation of a contour, the visual system integrates fragments of a pattern. One of the 'binding rules' governing this process requires that a path of conjunction in which contrast polarity is preserved be followed. Here we show that this rule has a corollary: where two alternative paths compete to emerge in opposite directions, the one with greater contrast luminance is likely to prevail.
authors.affiliation: Dipartimento di Scienze della Comunicazione, Università di Siena, Banchi di Sotto 55, 53100 Siena, Italy parlangeli@unisi.it
authors.forename: Oronzo
authors.initials: O
authors.lastname: Parlangeli
authors.forename: Sergio
authors.initials: S
authors.lastname: Roncato
mesh_terms: D015350:Contrast Sensitivity / Q000502:physiology; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D009903:Optical Illusions; D014795:Visual Pathways / Q000502:physiology