Nowadays most remote sensing systems include sensors able to capture, simultaneously, a multispectral image, along with a high resolution panchromatic image. Pansharpening, is a pixel level fusion technique used to increase the spatial resolution of the multispectral image while simultaneously preserving its spectral information. The benefit of merged images has been demonstrated in many practical applications, especially for vegetation, land use, precision farming, urban studies, feature detection, change monitoring and land cover classification. In this book we provide a review...