BUILDING RECONSTRUCTION BASED ON THREE-DIMENSIONAL PHOTO-MODELS <br />AND TOPOLOGIC APPROACHES

ISBN 0-85406-898-8Three-dimensional photo-models are object-models with texture information taken from photographs. <br />They can be used to present architectural objects to the public and decision-makers. Photo-realism <br />can only be obtained if the geometry of the building is represented by accurate methods and if texture <br />or real world imagery is additionally mapped to the faces of the objects. <br />For the modeling of buildings located in urban areas, we consider a first step based on topology <br />structure combined with geometry to construct the more coherent 3D model. Our method is supported <br />by manual and semi-automated procedures for house and roof extraction, based on 3D description of <br />buildings from aerial photographs. Specified Graphical User Interfaces (GUI) have been developed <br />and integrated in the general shape of MicroStation-J toolboxes. These tools are mainly : <br />- A “building-generator” which automatically completes the shape of the building by projecting the <br />roof onto the DTM; <br />- An “Architectural-generator” which automatically completes the different details of the building's <br />faces; <br />- A “Topology-generator” able to produce structured tables of the graphical elements. <br />In the second step, the orthophotos processed from the original images are then applied to the faces <br />of the object. Most architectural photogrammetry software packages, since they are mainly used for <br />visualization and animation purposes, allow such a possibility. <br />Our method has been applied to the zoological museum located in Strasbourg (close to the ENSAIS <br />campus)