Glossary for Geospatial Science

VQ Filtering:� An image transformation procedure in Hyperspectral Analysis.� This procedure is related conceptually to the Self-Organizing Map (SOM) classifier.� The VQ Filtering procedure applies the SOM classifier to the image to derive 256 spectral classes and assigns each image cell to the class with the closest mean value in spectral space.� The resulting residual (filtered) image of each input band shows how well each cell fits its assigned class at that wavelength.