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Journal for Geometry and Graphics 7 (2003), No. 2, 137--144
Copyright Heldermann Verlag 2003
An Algebraic Equation for the Central Projection
Arne Dür
Institut for Mathematics, University of Innsbruck, Technikerstr. 25, A 6020 Innsbruck, Austria,
arne.duer@uibk.ac.at
A necessary and sufficient condition for a central-axonometric reference
system to be the image of a positively oriented orthonormal frame under
a central projection is given by a single complex equation. The presented
equation is an analogon of the Gauss equation that characterizes the
reference system of an orthogonal axonometry.
Keywords: central projection, central axonometry, Gauss equation.
MSC: 51N05.
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