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Structure-from-motion under orthographic projection
Image and Vision Computing, 1990Structure-from-motion algorithms based on matched point-like features under orthographic projection are explored, for use in analysing image motion from small rigid moving objects. For two-frame analysis, closed-from n-point algorithms are devised that minimise image-plane positional errors.
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The observer. Orthographic and perspective projections. Clipping
1992We now introduce the concept of an observer. Our eventual aim is to represent, in the graphics viewport, a three-dimensional scene as viewed by a person standing at a given position and looking in a given direction; with position and direction specified relative to the ABSOLUTE system.
Ian O. Angell, Dimitrios Tsoubelis
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Cartography in the Round—The Orthographic Projection
The Cartographic Journal, 1979AbstractThroughout its history the principal function of cartography has been the supply of maps for navigational, engineering or cadastral purposes to a clientele interested tn the map primarily as a basis of mensuration. The interest of the map maker tended therefore to be restricted to projections whose properties facilitated accurate representation
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