BARE EARTH DIGITAL ELEVATION MODEL EXTRACTION FOR THREE-DIMENSIONAL REGISTRATION FROM TOPOGRAPHICAL POINTS

摘要

A method (300) for extracting a digital elevation model from a plurality ofraw topographical points representing a plurality of frames representing aplurality of perspectives of a multi-dimensional object comprising a surfaceand above-surface obstructions, comprises steps or acts of: finding thesurface (304) by filtering out data points produced by the above-surfaceobstructions to provide a plurality of surface data points representing thesurface; and filtering the surface data points (306) with a competitive filterto provide a multi-dimensional surface shell of digital elevation model datapoints. The above-described method can also be carried out by a specialized orprogrammable information processing system (200) or as a set of instructionsin a computer-readable medium such as a CD ROM or DVD or the like.