Perceiving Geometry

Geometrical Illusions Explained by Natural Scene Statistics
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ISBN-13:
9780387254876
Erscheinungsdatum:
01.09.2005
Seiten:
126
Autor:
Catherine Q. Howe
Gewicht:
402 g
Format:
241x160x13 mm
Sprache:
Englisch
Beschreibung:

During the last few centuries, natural philosophers, and more recently vision scientists, have recognized that a fundamental problem in biological vision is that the sources underlying visual stimuli are unknowable in any direct sense, because of the inherent ambiguity of the stimuli that impinge on sensory receptors. The light that reaches the eye from any scene conflates the contributions of reflectance, illumination, transmittance, and subsidiary factors that affect these primary physical parameters. Spatial properties such as the size, distance and orientation of physical objects are also conflated in light stimuli. As a result, the provenance of light reaching the eye at any moment is uncertain. This quandary is referred to as the inverse optics problem. This book considers the evidence that the human visual system solves this problem by incorporating past human experience of what retinal images have typically corresponded to in the real world.
Understanding vision - whether from a neurobiological, psychological or philosophical perspective - represents a daunting challenge that has been pursued for millennia. Here, the authors consider the evidence that, with respect to the perception of geometry, the human visual system solves problems by incorporating past human experience of what retinal images have typically corresponded to in the real world. This empirical strategy, documented by extensive analyses of scene geometry, explains many otherwise puzzling aspects of what we see.
The Geometry of Natural Scenes.- Line Length.- Angles.- Size.- Distance.- The Müller-Lyer Illusion.- The Poggendorff Illusion.- Implications.

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