Amodal Volume Completion and the Thin Building Illusion.
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TLDR
Results from an experiment showing that a tall pillar with a triangular base evokes radically different three-dimensional percepts depending on the vantage point from which it is observed suggest that the visual system uses a preference for rectangularity (or symmetry) to determine the 3D shape of objects.Abstract:
We report results from an experiment showing that a tall pillar with a triangular base evokes radically different three-dimensional (3D) percepts depending on the vantage point from which it is observed. The base of the pillar is an isosceles right triangle, but the pillar is perceived as just a thin plane when viewed from some vantage points. Viewed from other vantage points, the perceived 3D shape of the pillar corresponds to a square or rectangular base. In general, our results suggest that the visual system uses a preference for rectangularity (or symmetry) to determine the 3D shape of objects. The amodal impressions of the invisible backside of the pillar are often quite compelling, and the corresponding illusions persist even when the observers know the true shape of the pillar. Interestingly, though, the compellingness and definiteness of the amodal impression of the pillar's backside depends on the vantage point. This is reflected in corresponding differences in the interobserver variability of the 3D shape judgments. We also discuss how variants of this illusion are used as a powerful tool in the art of magic.read more
Citations
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A contour propagation approach to surface filling-in and volume formation
TL;DR: A new approach to surface and volume formation is introduced in response to the question, "Why do some silhouettes look 3 dimensional (3D) and others look 2D?"
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Amodal Completion Revisited.
TL;DR: The standard view of AC, depicted as a set of processes that extrapolate from veridically represented image fragments, is evaluated and rejected on the basis of evidence that AC modifies also modal parts.
Journal ArticleDOI
Illusions of Imagery and Magical Experiences
TL;DR: A first exploratory overview and preliminary conceptual analysis of a class of magic tricks, namely, a set of tricks that can be loosely defined as topological tricks, is offered.
Journal ArticleDOI
Mid-level Priming by Completion vs. Mosaic Solutions.
TL;DR: The study confirmed that contour connectability and curvature polarity are effective structural factors capable of competing with symmetry in mid-level image segmentation and completion processes.
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From Michotte Until Today: Why the Dichotomous Classification of Modal and Amodal Completions Is Inadequate:
Tom R. Scherzer,Franz Faul +1 more
TL;DR: It is argued that the dichotomous distinction between modal and amodal completions is problematic in phenomenological, empirical, logical, and theoretical terms and proposed alternative criteria allowing for a more differentiated classification scheme for completion phenomena.
References
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Is vision continuous with cognition? The case for cognitive impenetrability of visual perception
TL;DR: The paper discusses arguments from computer vision and psychology showing that vision is "intelligent" and involves elements of "problem solving" and examines a number of examples where instructions and "hints" are alleged to affect what is seen.
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A theory of visual interpolation in object perception.
TL;DR: A new theory explaining the perception of partly occluded objects and illusory figures, from both static and kinematic information, in a unified framework is described, with a detailed theory of unit formation that accounts for most cases of boundary perception in the absence of local physical specification.
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A quantitative approach to figural "goodness".
Julian Hochberg,Edward McAlister +1 more
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