Full-Resolution Quality Assessment of Pansharpening: Theoretical and hands-on approaches

Panchromatic (Pan) sharpening, or pansharpening, refers to the combination of a multispectral (MS) image and Pan data with a finer spatial resolution. Since the early days of this research topic, the issue of quality assessment has played a central role in the related literature, pushing investigators toward extensive research. The solution to this problem is nontrivial because of its ill-posed nature. Indeed, no reference image is available to compare with the outcome of the fusion process.