| This report examines semi-automatic methods of building extraction from aerial imagery.; The semi-automatic building extraction system ObEx1 is described in detail. The functionality of the implemented tools and the system structure are examined for further extension.; Reliable data usage requires information on the quality of the data. The evaluation of the Varsity2 test area used the quality model from Ragia3 of the University of Bonn. The results reflect the characteristics and geometrical and topological properties of the test area.; The ObEx system can handle all three types of models and was used for the complete measurement of the campus of the University of New Brunswick. The integrated automation tools increased the accuracy and reduced the time and effort of the semi-automatic registration. Areas with complex and densely built-up cities impede a good registration. The choice of quality measures has to take into account these factors. (Abstract shortened by UMI.); 1ObEx is a software package, developed at the Institute for Photogrammetry, Bonn, Germany 2Test area Varsity contains the Campus of the University of New Brunswick 3Dipl.-Ing. Lemonia Ragia, Institute for Photogrammetry, Bonn, Germany... |
