Two new methods integrating region growing and edge detection are presented to extract
buildings in aerial images. In the domain we are considering, building shadows play an
important role in enhancing the detection accuracy and reliability. In both methods,
interpretations of buildings are only based on the reliable features (shadows and shapes of
buildings in our case) obtained by segmentation and are not affected by artifacts or
sementation errors. We also propose algorithms to correct the segmentation errors or to …