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SHAPE ENCODING AND SUBJECTIVE CONTOURS’

by Mike Brady, W. E. L. Grimson, D. J. Langridge
"... Ullman [15] has investigated the shape of subjective contours (see for example [7]. [4]. [5], (121). In fact, the work is more generally applicable to other cases of pcrccptual shape completion, in which the visual system is not constrained by actual physical intensity changes. Examples include patt ..."
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Ullman [15] has investigated the shape of subjective contours (see for example [7]. [4]. [5], (121). In fact, the work is more generally applicable to other cases of pcrccptual shape completion, in which the visual system is not constrained by actual physical intensity changes. Examples include

Subjective contours and binocular rivalry suppression

by Kenith V. Sobel, Olph Blake , 2002
"... Binocular rivalry probably involves distributed neural processes, some responsible for dominance, others for suppression and still others for fluctuations in perception. Focusing on the suppression process, the present study asks whether neural events underlying rivalry suppression take place prior ..."
Abstract - Cited by 4 (1 self) - Add to MetaCart
to, or subsequent to those underlying the synthesis of subjective contours. Specifically, we examined whether (i) a subjective contour could prematurely return a suppressed target to dominance and (ii) whether suppression of a Kanizsa-type inducer precludes the formation of a subjective contour

SUBJECTIVE CONTOURS AND APPARENT DEPTH 1

by Stanley Coren
"... The phenomenal appearance of contours in the absence of abrupt stimulus gradients was first discovered by F. Schumann. Recently such contours have been produced in Julesz patterns using binocular disparity. Analysis indicates that both monocular and binocular subjective contours result from the pres ..."
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The phenomenal appearance of contours in the absence of abrupt stimulus gradients was first discovered by F. Schumann. Recently such contours have been produced in Julesz patterns using binocular disparity. Analysis indicates that both monocular and binocular subjective contours result from

Dynamics of Subjective Contour Formation in the Early Visual Cortex

by Tai Sing Lee, My Nguyen , 2001
"... this paper demonstrate for the rst time that V1 neurons do respond to the subjective contour of a static Kanizsa gure. Furthermore, they show that illusory contour response occurs later in V1 than in V2 for the same stimulus. Together, these two observations suggest that early perceptual computati ..."
Abstract - Cited by 102 (8 self) - Add to MetaCart
this paper demonstrate for the rst time that V1 neurons do respond to the subjective contour of a static Kanizsa gure. Furthermore, they show that illusory contour response occurs later in V1 than in V2 for the same stimulus. Together, these two observations suggest that early perceptual

Snakes: Active contour models

by Michael Kass, Andrew Witkin, Demetri Terzopoulos - INTERNATIONAL JOURNAL OF COMPUTER VISION , 1988
"... A snake is an energy-minimizing spline guided by external constraint forces and influenced by image forces that pull it toward features such as lines and edges. Snakes are active contour models: they lock onto nearby edges, localizing them accurately. Scale-space continuation can be used to enlarge ..."
Abstract - Cited by 3951 (17 self) - Add to MetaCart
the cap-ture region surrounding a feature. Snakes provide a unified account of a number of visual problems, in-cluding detection of edges, lines, and subjective contours; motion tracking; and stereo matching. We have used snakes successfully for interactive interpretation, in which user-imposed constraint

Evidence Relating Subjective Contours And Interpretations Involving Occlusion

by Kent A. Stevens , 1983
"... Subjective contours, according to.one theory, outline surfaces that are apparenfiy interposed between the viewer and background (because of the disruption of background figures, sudden termination of lines, and other occlusion "cues") but are not explicitly outlined by intensity discontinu ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
Subjective contours, according to.one theory, outline surfaces that are apparenfiy interposed between the viewer and background (because of the disruption of background figures, sudden termination of lines, and other occlusion "cues") but are not explicitly outlined by intensity

PARALLELS AND TRANSVERSAL SUBJECTIVE CONTOURS IN THE POGGENDORFF ILLUSION

by Andrea Spoto, Alessia Bastianelli, Roberto Burro, Giulio Vidotto
"... When the continuity of an obliquely oriented line is broken by a vertically oriented pair of parallels, the position of the line segment on the other side of the interruption does not seem to be collinear, but vertically shifted (i.e. the Poggendorff illusion). Evidences from literature proved that ..."
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that the Poggendorff illusion is still present when there are no parallels but Kanizsa-like subjective contours. The present study attempts to verify whether the Poggendorff illusion persists when both the transversal segment and the parallels consist of Kanizsa-like subjective contour. Eight participants were tested

Some new subjective contours in random-line stereograms

by John P Frisby - Perception , 1975
"... Abstract. Some new subjective contours are described and it is suggested that both these and previously observed disparity-based illusory contours can be explained simply in terms of the magnetic dipole model of stereopsis without any reference to gestalt or cognitive factors. 1 ..."
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Abstract. Some new subjective contours are described and it is suggested that both these and previously observed disparity-based illusory contours can be explained simply in terms of the magnetic dipole model of stereopsis without any reference to gestalt or cognitive factors. 1

Subjective contours Contour interpolation Support ratio Shape formation

by Bat-sheva Hadad, Daphne Maurer, Terri L. Lewis , 2010
"... a b s t r a c t Adults are skilled at perceiving subjective contours in regions with-out any local image information (e.g., Ginsburg, 1975; Kanizsa, 1976). Here we examined the development of this skill and the effect thereon of the support ratio (i.e., the ratio of the physically specified contours ..."
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a b s t r a c t Adults are skilled at perceiving subjective contours in regions with-out any local image information (e.g., Ginsburg, 1975; Kanizsa, 1976). Here we examined the development of this skill and the effect thereon of the support ratio (i.e., the ratio of the physically specified

doi:10.1068/p7276 Subjective contours along truncated letters

by Barbara Gillam, Elia Vecellio , 2012
"... Abstract. The truncation of upper-case words can result in a subjective contour along the truncated ends of the letters. We explored this effect in two experiments designed to tease apart the processes responsible: in particular, the possible role of letter recognition. Such a role would indicate an ..."
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Abstract. The truncation of upper-case words can result in a subjective contour along the truncated ends of the letters. We explored this effect in two experiments designed to tease apart the processes responsible: in particular, the possible role of letter recognition. Such a role would indicate
Results 1 - 10 of 1,102