A multispectral edge detection scheme and its application to Landsat imagery

It is shown how to extend in a formally well-founded way a state-of-the-art gray-level edge detector to be applied to multi-dimensional image functions. Based on the mathematical approach the authors introduce a detection scheme which is not limited to a specific number of image components (spectral channels). In several experiments done on TM-data The authors demonstrate that the multispectral approach allows them to integrate the contrast information contained in the different channels in a satisfactory way