Nearest Neighbor Diffuse (NNDiffuse) algorithm is a state-of-the-art pan sharpening technique to fuse images, originally developed by Rochester Institute of Technology Digital Imaging and Remote Sensing Laboratory. Now the algorithm is available as an operator for use in building Spatial Models capable of deriving information from high resolution multispectral data. (source: Hexagon Geospatial)
Credit : Hexagon Geospatial