Segmentation of Façade Images Using Ultimate Opening

In recent years, automatic reconstruction, modeling and interpretation of urban environment and building structures is an area which gained interest. Urban environment’s modeling allows developing different applications such as: cultural and tourism information, urban planning, simulation for urban catastrophes, business development, and virtual reality. Five levels of detail (LoD) have been defined by the Sig3D group for urban environments models [1]. Several approaches of modeling have focused on coarse modeling, for instance: polyhedral representation, main walls, roof planes and ground planes. Nevertheless, the last research issues try analyzing facades of buildings. This analysis extracts and reconstructs windows, doors and ornaments to provide rich information of the buildings adding realism for visualization.