Anti-aliased GLCM textural analysis

Computes the anitaliased inverse difference moments GLCM textural analysis measure.

Standard GLCM textural analysis often doesn't give good results unless a large number of global classes are used (and using a large number of classes brings other problems). Using local classes helps, but the results are sensitive to noise. This program uses unweighted area sampling to vastly improve the result of both global and local GLCM textural analysis. See;

Cooper, G.R.J., 2009. The Antialiased Textural Analysis of Aeromagnetic Data. Computers & Geosciences v.35, p.586-591.

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