ABSTRACT
Many remote sensing applications, such as change detection, map updating, environmental monitoring, land-cover classification and weather forecasting, require images with high spatial and high spectral resolutions [1]. However, due to the technical limitations of the current sensors, most optical Earth observation satellites, such as QuickBird, IKONOS, GeoEye-1 and WorldView-2 can only provide Low-Resolution Multispectral (LRMS) images and High-Resolution Panchromatic (HRP) images. The LRMS images provide spectral information that is necessary for thematic interpretation, while the HRP images can be used for accurate geometric analysis.
