scholarly journals Identity imposition and its role in a stereokinetic effect

1990 ◽  
Vol 48 (6) ◽  
pp. 535-542 ◽  
Author(s):  
Hans Wallach ◽  
Nicholas M. Centrella
Keyword(s):  
Stereokinetic Effect

Wobble Cones and Wobble Holes: The Stereokinetic Effect Revisited

Perception ◽  
1983 ◽  
Vol 12 (2) ◽  
pp. 187-193 ◽  
Author(s):  
John A Wilson ◽  
James O Robinson ◽  
David J Piggins
Keyword(s):  
Motion Parallax ◽  
Three Dimensional ◽  
Computer Programs ◽  
Three Dimensional Objects ◽  
Perceptual Invariance ◽  
Stereokinetic Effect

It is well-known that patterns of eccentric circles when slowly rotated give rise to compelling three-dimensional impressions of cones or conical holes which can ‘wobble’ as the pattern rotates. The wobble can be considered as part of the overall phenomenon of depth elicited from a rotating display, the ‘stereokinetic’ effect (SKE). This paper considers the three-dimensional appearance as being the result of the sliding of contours and thus it imitates the motion parallax found in real three-dimensional objects in motion. New variants of SK figures are used to examine these points. An analogy with computer programs is proposed which questions earlier views on the location of perceptual invariance.

Learning to See Stereokinetic Effects

Perception ◽  
1987 ◽  
Vol 16 (2) ◽  
pp. 187-192 ◽  
Author(s):  
Paola Bressan ◽  
Giorgio Vallortigara
Keyword(s):  
Rigid Body ◽  
Structure From Motion ◽  
Incubation Time ◽  
Stimulus Pattern ◽  
Circular Ring ◽  
Frontoparallel Plane ◽  
Stereokinetic Effect ◽  
Flat Pattern

The Saturn illusion is a stereokinetic effect that occurs when a flat pattern composed of a full ellipse with two symmetrical semirings is rotated slowly in the frontoparallel plane. Subjects report seeing an egg-shaped object inserted into a circular ring, and the two objects move solidly into 3-D space as a single rigid body. Inexperienced observers show a conspicuous delay before reaching this percept. Two experiments are reported in which it is shown that this incubation time progressively decreases with repeated exposures to the stimulus pattern. A certain amount of time (14 s on average) is, however, required to obtain the effect, even after six successive exposures. It is argued that this time, which is independent of the speed of rotation and is not further reducible, is a fixed entity and is needed to compute the most rigid 3-D solution from deformations in the 2-D image. The results are discussed in relation to current theories of perception of structure from motion.

Multiple 3-D Interpretations in a Classic Stereokinetic Effect

Perception ◽  
1986 ◽  
Vol 15 (4) ◽  
pp. 405-408 ◽  
Author(s):  
Paola Bressan ◽  
Giorgio Vallortigara
Keyword(s):  
Prolonged Exposure ◽  
Frontal Plane ◽  
Circular Disc ◽  
Frontoparallel Plane ◽  
Circular Trajectory ◽  
Axis Ratio ◽  
Stereokinetic Effect ◽  
Flat Pattern

It is known that a flat ellipse rotating in the frontoparallel plane sooner or later appears as a rigid circular disc tilting in 3-D space. An experiment is reported in which prolonged exposure to the same flat pattern produces a second previously unnoticed 3-D percept: an elongated egg slanted in 3-D space, which points towards the observer and the end parts of which describe a circular trajectory in the frontal plane. It is shown that the achievement of this alternative percept is not affected by the particular shape of the ellipse, although the time needed to reach it increases with an ellipse with a 2:3 axis ratio.

The saturn illusion: A new stereokinetic effect

1986 ◽  
Vol 26 (5) ◽  
pp. 811-813 ◽  
Author(s):  
Giorgio Vallortigara ◽  
Paola Bressan ◽  
Mario Zanforlin
Keyword(s):  
Stereokinetic Effect

scholarly journals A computational explanation of the stereokinetic effect

2011 ◽  
Vol 11 (11) ◽  
pp. 64-64
Author(s):  
X. Yang ◽  
Z. Liu
Keyword(s):  
Computational Explanation ◽  
Stereokinetic Effect

Stereokinetic Interaction Effects Involving Static and Slowly Moving Identical Figures

1996 ◽  
Vol 83 (2) ◽  
pp. 387-400
Author(s):  
David Piggins ◽  
John A. Wilson ◽  
James O. Robinson
Keyword(s):  
Retinal Image ◽  
Stimulus Condition ◽  
Motion Parallax ◽  
Interaction Effects ◽  
Depth Effect ◽  
Temporal Interaction ◽  
Stereokinetic Effect

Here a new depth effect evoked by the spatial and temporal interaction in 2-D of a slowly moving circle (optimally at 0.6 rads/sec.) with an identical static circle is reported. Typically, respondents report that with increasing adjacency, commencing with separations of a few diameters, the moving circle appears in a different plane of depth to the static circle, it then usually appears to “dip” onto the static circle and after complete coincidence with it to rise away from it. This effect, together with a number of associated descriptions are commented upon, in addition to observations when viewing overlapped static circles and overlapped circles in motion, this latter stimulus condition evoking the stereokinetic effect. The authors have previously suggested that contour “sliding,” which simulates motion parallax, is the key to understanding stereokinesis. The stimulus conditions giving rise to this new effect directly simulate the motion parallax information present in a retinal image.

scholarly journals Motion Minimization and the Stereokinetic Effect

2004 ◽  
Vol 4 (8) ◽  
pp. 724-724
Author(s):  
B. Rokers ◽  
A. Yuille ◽  
Z. Liu
Keyword(s):  
Stereokinetic Effect
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