FUSION OF OPTICAL IMAGERY AND SAR/INSAR DATA FOR OBJECT EXTRACTION
Olaf Hellwich · 2010
Optical imagery such as high-resolution panchromatic or multispectral data, and SAR/INSAR data show different information about the imaged objects, and have different advantages and disadvantages when used for object extraction or landuse classification. Multispectral optical image data is largely determined by the type of the material an object consists of. Panchromatic data which is often available with a higher resolution than multispectral data emphasizes geometric detail of the objects, e.g. the complex structure of anthropogenic objects such as road networks. In contrary to this, SAR data contain information about small-scale surface roughness and - to a lower degree - soil moisture. Height information derived by interferometric processing of SAR data contains large-scale surface roughness. These different types of information are referring to completely different object qualities and are, therefore, largely uncorrelated which helps to reduce ambiguities in the results of object ...