[GRASS-user] [GRASS-dev] New addon: i.pysptools.unmix

Stefan Blumentrath Stefan.Blumentrath at nina.no
Thu Feb 8 01:37:56 PST 2018

Hi Moritz,

We are about to compare results from the two addons...
Unfortunately, I missed some details, so the manual page is not online yet (issues should be fixed now).

The main additions, compared to i.spec.unmix are 
 - three alternative endmember detection algorithms
 - (at least) two additional algorithms for spectral unmixing (Unconstrained least squares and fully constrained least squares (with the latter, pixels values in the resulting maps sum up to 1).

I should probably also mention, that i.pysptools.unmix allows to write out detected end members in a format that i.spec.unmix understands. So the modules can be complementary...


-----Original Message-----
From: Moritz Lennert [mailto:mlennert at club.worldonline.be] 
Sent: torsdag 8. februar 2018 09.06
To: Stefan Blumentrath <Stefan.Blumentrath at nina.no>; grass-user grass-user (grass-user at lists.osgeo.org) <grass-user at lists.osgeo.org>; GRASS developers list (grass-dev at lists.osgeo.org) <grass-dev at lists.osgeo.org>
Subject: Re: [GRASS-dev] New addon: i.pysptools.unmix

On 06/02/18 23:37, Stefan Blumentrath wrote:
> Dear all,
> I just committed a new addon (i.pysptools.unmix) which is a wrapper 
> around the endmember extraction and spectral unmixing functionality in 
> the pysptools python library [1].
> Feedback will be gladly received!

Great, thanks a lot ! How does it compare to i.spec.unmix ? I assume it adds more algorithms ?


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