Michele Zurlo: [..]
I use this e-mail also to make a question, during a work I tried to classify a pancromatic aerial image using an unsupervised approach. Running i.cluster it gave me an error indicating that it needs more than two classes. What I missed?
Dear Michele, the algorithm behind i.cluster does not work with less than two input images. See also: https://trac.osgeo.org/grass/ticket/1908. Kind of a common practice, is to use another input derived from the first. I.e., some synthetic image, derived from the aerial panchromatic one. See https://grass.osgeo.org/grass74/manuals/r.texture.html. Nikos
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