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Does anyone know if the r.mfilter will support negative values in the
matrix filter file. I was hoping to do a high pass filter on a dataset,
so I created a filter for input in the following format, but it will
not work.<br>
<br>
TITLE HighPass3x3<br>
MATRIX 3<br>
-1 -1 -1<br>
-1 8 -1<br>
-1 -1 -1<br>
DIVISOR 9<br>
TYPE S<br>
<br>
Input command is:<br>
r.mfilter input=Mag_12.5@LaIndia output=HighPass3x3_Mag12.5
filter=/home/cvandenberg/Documents/Filters/HighPass3x3.txt<b><br>
</b><b>ERROR: Filter file format error</b><br>
<br>
<br>
When I run a low pass filter (for example an N x N filter with all '1'
the filter file is recognized.<br>
<br>
Any hints on how I can go about running a high pass filter using GRASS?<br>
<br>
Thanks,<br>
<br>
Casey<br>
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