[GRASS-dev] [GRASS GIS] #3210: r.texture: bug when non continuous series of values
GRASS GIS
trac at osgeo.org
Tue Nov 15 07:30:55 PST 2016
#3210: r.texture: bug when non continuous series of values
--------------------------+-------------------------
Reporter: mlennert | Owner: grass-dev@…
Type: defect | Status: new
Priority: normal | Milestone: 7.2.0
Component: Raster | Version: svn-trunk
Resolution: | Keywords: r.texture
CPU: Unspecified | Platform: Unspecified
--------------------------+-------------------------
Comment (by mlennert):
Just one question:
The manual says:
r.texture assumes grey levels ranging from 0 to 255 as input. The input
is automatically rescaled to 0 to 255 if the input map
range is outside of this range.
But when I rescale the above (second) matrix to 0,255 I get a different
result:
{{{
r.in.ascii --o in=- out=test_matrix <<EOF
north: 3
south: 0
east: 3
west: 0
rows: 3
cols: 3
1 1 1
3 0 0
0 0 3
EOF
r.texture -s test_matrix out=text method=idm --o
r.stats -1n text_IDM_90
0.40000007
r.rescale test_matrix out=test_matrix_rescaled to=0,255
r.texture -s test_matrix_rescaled out=text_rescaled method=idm --o
r.stats -1n text_rescaled_IDM_90
0.16672371
}}}
I would have thought that the result should be the same ?
Moritz
--
Ticket URL: <https://trac.osgeo.org/grass/ticket/3210#comment:3>
GRASS GIS <https://grass.osgeo.org>
More information about the grass-dev
mailing list