Inverse Gnomonic Projection of Plane Regions

Wolfram Demonstrations Project (2011)
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Abstract

This demonstration shows inverse gnomonic projections of flat surface areas lying in a horizontal plane tangent to the projection sphere. It shows how optical surface area varies regularly as the distance of the respective surface area from the eye varies, decreasing as the latter increases. According to ecological psychology, this kind of regularity or "invariant" is what sensory systems are designed to detect. Attunement to such invariants in the interactions of eyes and terrains make possible the perception of distance and of surface walkability.

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2013-06-17

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F. Thomas Burke
University of South Carolina

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