Bare earth digital elevation model extraction for three-dimensional registration from topographical points
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United States of America Patent
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Nov 20, 2007
Grant Date -
Jan 19, 2006
app pub date -
Jul 15, 2004
filing date -
Jul 15, 2004
priority date (Note) -
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Abstract
A method (300) for extracting a digital elevation model from a plurality of raw topographical points representing a plurality of frames representing a plurality of perspectives of a multi-dimensional object comprising a surface and above-surface obstructions, comprises steps or acts of: finding the surface (304) by filtering out data points produced by the above-surface obstructions to provide a plurality of surface data points representing the surface; and filtering the surface data points (306) with a competitive filter to provide a multi-dimensional surface shell of digital elevation model data points. The above-described method can also be carried out by a specialized or programmable information processing system (200) or as a set of instructions in a computer-readable medium such as a CD ROM or DVD or the like.
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