Change Detection
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The two GeoTiff images fmap1990.tif and fmap2000.tif are binary images
showing a forest mask having 1b (background) and 2b (foreground).

These images can be used to test and see the difference 
for the two change detection tools available from 
File -> Change
-> Simple Change: Pixel-by-pixel difference
-> Morph. Change: Morphological change detection highlighting 
   essential gain (green) and loss (red) areas  

More information on change detection is available in
Help -> GTB Documentation -> GTB Manual.
