[gdal-dev] Is there documetation about filters and some python utilities?

[Etienne Tourigny]

On Sun, Feb 16, 2014 at 8:36 AM, Jukka Rahkonen
<jukka.rahkonen at mmmtike.fi>wrote:

> Hi,
>
> I was thinking that a possibility to run images through filters with GDAL
> could be nice sometimes. Especially for visual work with aerial and
> satellite images filters like "sharpen" of "unsharp mask"
> http://en.wikipedia.org/wiki/Unsharp_masking are often very useful. But
> then
> I found that kernel filters can already be used inside VRT files. Are there
> usage examples with before-after comparison images somewhere in our
> documentation?
>

The only I know of is the vrt tutorial (with very few details), but you
have probably already read that

http://www.gdal.org/gdal_vrttut.html

These refs may help (obtained through a simple google search)

http://homepages.inf.ed.ac.uk/rbf/HIPR2/unsharp.htm
http://stackoverflow.com/questions/2938162/how-does-an-unsharp-mask-work


>
> I also found that there are some python scripts included in
> \gdal\bin\gdal\python\scripts at least in the gisinternals GDAL builds but
> some scripts are not listed in http://gdal.org/gdal_utilities.html.  Is
> there some other place where to find documentation about these scripts, for
> example gdal_calc.py ? Some other than the sources, I mean.
>
> -Jukka Rahkonen-
>
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