Wout, On Fri, Aug 22, 2008 at 2:29 PM, Wout Bijkerk <[EMAIL PROTECTED]> wrote: ... > Looking at the images, I wonder if including textural features within > the images would be usefull: a forest canopy has a far coarser texture > than a grassland. Also in the Grassbook this is mentioned, and for the > supervised classification of saltmarshes in Germany, textural features > are also used ... > 1) Is it usefull to make a raster with textural image features as an > extra input for i.gensigset / i.smap? The i.gensigset / i.smap procedure > is partly based on geometry and therefor on texture as well so what does > a texturemap add? ...
It's worth trying. I have done so for orthophoto classification and it definitely helped: http://mpa.itc.it/markus/ortho_smap/ The texture map(s) add patterns which can stabilize the process of assigning pixels to classes/can improve the segmentation part of i.smap as it renders heterogeneous areas to homogeneous areas. Markus _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user