Building Footprints Extraction Methods Based on Marker-controlled Watershed Segmentation and Local Radon Transformation

摘要

Building footprints extraction is an important part of buildings detection. This study presented two methods to extract building footprints. Firstly, the marker-controlled watershed segmentation method can obtain the closed building footprints. It can make full use of the grads information, building information by itself and background information from Synthetic Aperture Radar (SAR) image. Then, the local Radon transformation method can extract the location and direction of buildings. It can obtain the building footprints by combining and fitting the line segments. The airborne polarimetric SAR (PolSAR) image was acquired in the experiment. The experiment results show that the two methods have better advantages in building footprints extraction and can extract building footprints observably and perfectly.