EXTRACTION AND TEXTURAL CHARACTERIZATION OF ABOVEGROUND AREAS FROM AERIAL STEREO PAIRS - A QUALITY ASSESSMENT

Above-ground analysis is a key point to the reconstruction of urban sc enes, but it is a difficult task because of the diversity of the invol ved objects. We propose a new method to above-ground extraction from a n aerial stereo pair, which does not require any assumption about obje ct shape or nature. A Digital Surface Model is first produced by a ste reoscopic matching stage preserving discontinuities, and then processe d by a region-based Markovian classification algorithm. The produced a bove-ground areas are finally characterized as man-made or natural acc ording to the grey level information. The quality of the results is as sessed and discussed. (C) 1998 Elsevier Science B.V. All rights reserv ed.