Illusory contours from inducers defined solely by spatiotemporal correlation
نویسندگان
چکیده
منابع مشابه
Non-rigid illusory contours and global shape transformations defined by spatiotemporal boundary formation
Spatiotemporal boundary formation (SBF) is the perception of form, global motion, and continuous boundaries from relations of discrete changes in local texture elements (Shipley and Kellman, 1994). In two experiments, small, circular elements underwent small displacements whenever an edge of an invisible (virtual) object passed over them. Unlike previous studies that examined only rigidly trans...
متن کاملClassifying illusory contours: edges defined by "pacman" and monocular tokens.
Thresholds for the discrimination of orientation were measured in the human fovea for figures and borders delineated by solid lines and by "pacman" tokens as introduced by Kanizsa, as well as by contours induced by monocular tokens giving a stereoscopic depth illusion of a knife edge. Orientation discrimination of these illusory contours is poorer by a factor of approximately 2 than that of equ...
متن کاملIllusory contours
Illusory contours are perceived in the absence of any real physical luminance gradients between inducers that are spatially discontinuous (Fig. 1a,b).1–3 It has been controversial whether the perception of these subjective contours arise from higher level cognitive mechanisms that depend on attention and serial search4–6 or from lower level parallel processing in the early automatic, preattenti...
متن کاملExtraction of Illusory Contours by Perceptual Grouping
The detection of arbitrary objects in images is still a major challenge in image processing. Many approaches rely on the robust extraction of contours. Object contours, however, are frequently occluded by other objects. How can one deal with this problem? One important source for inspirations in such diicult situations is the human visual system. There are several systems that describe the earl...
متن کاملBackground motion and the perception of shape defined by illusory contours.
A Kanizsa triangle is usually generated by placing three circular tokens, with deleted wedges, at the apexes of an equilateral triangle. If the token angles do not each subtend 60 degrees, a Kanizsa triangle may still be evident, but with illusory contours that appear to be curvilinear. We investigated whether this curved-contour distortion in shape can be nulled by radial background image moti...
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ژورنال
عنوان ژورنال: Perception & Psychophysics
سال: 1986
ISSN: 0031-5117,1532-5962
DOI: 10.3758/bf03212488