Hello I've got a black and white image with some grey features on it
I'd like to create a new image containing only these features so I can vectorize them i think that I have to use r.mask r.mapcalc or r.reclass r.describe raster returns me 0-121 123 125-127 132-255 I created a mask of my image r.mask input=image maskcats="0 thru 121" -i -i to invert the maskcats range Only the grey features appear. So, my grey features seem to have the 0-121 range category of values. Considering that, how can I manage to create a raster map based only on these values. I used r.reclass like this: r.reclass input=raster output=rasterRec >0 thru 121=1 black >*=NULL But I didn't get any good result... Any help would be greatly appreciated! -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Extracting-grey-features-from-an-image-tp5107822p5107822.html Sent from the Grass - Users mailing list archive at Nabble.com. _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
