ABSTRACT
We present a novel method for fitting polygons to segmented image regions. The method is applied to the automatic reconstruction of 3D prismatic building models in urban areas, using regions segmented from the Digital Surface Map (DSM) and color orthoimages obtained from Google™-Earth. Polygon selection methods with complexity penalty terms are developed for the acquisition of simplified building outline models. Regular polygons such as rectangles, right trapezoids and general trapezoids are most common in urban areas, and special methods are developed for fitting these shapes to the segmented regions. Notwithstanding, irregular polygons are also considered since some ancient urban areas are plenty of buildings with non-standard shapes. Results are presented on the 3D reconstruction of the city of Lisboa, Portugal, with simple prismatic models.
