We report a new type of illusory contour (Illusory-O) whose formation is contingent upon the
contrast polarity of its juxtaposed inducing elements being similar, ie both elements must …

The neuronal and computational mechanisms involved in illusory contour formation are
thought to be sensitive to the orientation and magnitude of contrast at luminance …

Illusory contours are invoked by the visual system to account for otherwise inexplicable gaps
in the image. We report three sets of novel observations on illusory contours. First, when an …

Many paradoxical percepts are expressions of adaptive brain designs aimed at achieving
informative visual representations of the external world. Paradoxical percepts may therefore …

The study of illusory brightness and contour phenomena has become an important tool in
modern brain research. Gestalt, cognitive, neural, and computational approaches are …

The research literature on the processes and mechanisms underlying illusory contour
perception has been proliferating in recent years. Yet, what exactly do we know about …

The role of symmetry in the perception of illusory contours has been a subject of controversy
ever since Kanizsa proposed his theory of illusory contours based on Gestalt principles …

Visual images are ambiguous. Any image, or collection of images, is consistent with an
infinite number of possible scenes in the world. Yet we are generally unaware of this …

Illusory contours occur in a wide variety of circumstances in nature. A striking man-made
example is the Kanizsa triangle. A common factor in all such figures is the perception of a …

Our visual percepts are not fully determined by the physical stimulus input. That is why we
perceive crisp bounding contours even in the absence of luminance-defined borders in …