Building Extraction Building Extraction and Verification from Spaceborne and Aerial Imagery using Image Understanding Fusion Techniques

For automatic building extraction, the need of the fusion of several image understanding cues has been emphasised. In this paper, the fusion of a stereoscopic (pyramidal matching) and a monoscopic technique (building detection) was investigated. In the fusion technique proposed, building detection output is used as boundaries of height interpolation and pyramidal matching output as the source of height information. After height interpolation, buildings are reconstructed in 3D space. This fusion technique was tested with several examples and proved to be very powerful. The results of this paper support the role of fusion in more complete image understanding.