* Nikos Alexandris <n...@nikosalexandris.net> [2019-10-28 17:14:54 +0100]:
* Markus Neteler <nete...@osgeo.org> [2019-10-28 12:33:44 +0100]:
On Mon, Oct 28, 2019 at 10:46 AM Moritz Lennert
<mlenn...@club.worldonline.be> wrote:
On 27/10/19 18:52, Markus Neteler wrote:
Hi,
I am using i.fusion.hpf on Worldview-2 data and see that the resulting
range is completely different:
# orig
r.info -r wv2_17OCT08182034_M2AS_058891334010_01_P001.5
min=0
max=1509
# HPF
r.info -r wv2_17OCT08182034_M2AS_058891334010_01_P001.5.hpf
min=-1045.79783524995
max=3416.06793724612
Just guessing here, but did you try the -c flag ?
Now yes:
i.fusion.hpf pan=$PAN msx=$(g.list raster pattern="$COLORPREFIX.?"
sep=comma) -c --o
# band 8
r.info -r wv2_17OCT08182034_M2AS_058891334010_01_P001.8
min=0
max=1605
r.info -r wv2_17OCT08182034_M2AS_058891334010_01_P001.8.hpf
min=-1163.98434592277
max=3879.99538075697
So, -c doesn't seem to have any effect here.
Mean values (and StdDev) don't change too much though. As I am looking
over the algorithm again, these days, I'll try to answer this in the
best possible way.
Cheers, Nikos
Also, try the histograms too. Shapes are rather preserved. Scales are
not.
Here some images:
https://send.firefox.com/download/87f58d62ece20cb4/#6YJsCoKi7yW5wUiMbcs1LQ
(link expires after 5 downloads or 7 days).
Nikos
--
Nikos Alexandris | Remote Sensing & Geomatics
GPG Key Fingerprint 6F9D4506F3CA28380974D31A9053534B693C4FB3
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