mesma 1.0.2

MESMA is both a QGIS plugin and stand-alone python package that implements the MESMA (Multiple Endmember Spectral Mixture Analysis) unmixing algorithm in the field of Remote Sensing.

About MESMA

MESMA is both a QGIS plugin and stand-alone python package that implements the MESMA (Multiple Endmember Spectral Mixture Analysis) unmixing algorithm in the field of Remote Sensing.

It is based on VIPER Tools: a software package written for ENVI/IDL and released in 2007. Several updates have been released since and now it has been ported to PyQGIS in the period 2017 - 2020. The original VIPER Tools is now split over two python/QGIS tools: Spectral Library Tool and MESMA.

Spectral Library Tool provides the following:

• Creating spectral libraries interactively (selecting spectra from an image or using regions of interest) and managing the metadata (developed by HU Berlin)

• Optimizing spectral libraries with Iterative Endmember Selection, Ear-Masa-Cob or CRES

• Website: https://spectral-libraries.readthedocs.io

• Repository: https://bitbucket.org/kul-reseco/spectral-libraries

MESMA provides the following:

• Running SMA and MESMA (with multi-level fusion, stable zone unmixing, …)

• Post-processing of the MESMA results (visualisation tool, shade normalisation, …)

• Website: https://mesma.readthedocs.io

• Repository: https://bitbucket.org/kul-reseco/mesma

The software has now been developed in the open source environment to encourage further development of the tool.

Referencing the MESMA tool

When using the MESMA tool, please use the following citation:

Crabbé, A. H., Somers, B., Roberts, D. A., Halligan, K., Dennison, P., Dudley, K. (2019). MESMA QGIS Plugin (Version x) [Software]. Available from https://bitbucket.org/kul-reseco/mesma.

Acknowledgements

The software and user guide are based on VIPER Tools 2.0 (UC Santa Barbara, VIPER Lab): Roberts, D. A., Halligan, K., Dennison, P., Dudley, K., Somers, B., Crabbe, A., 2018, Viper Tools User Manual, Version 2, 91 pp.

MESMA is also using two python packages developed by Benjamin Jakimow and Andreas Rabe:

• QGISPluginSupport (Benjamin Jakimow, HU Berlin): https://bitbucket.org/jakimowb/qgispluginsupport

• hub-datacube (Andreas Rabe, HU Berlin): https://bitbucket.org/hu-geomatics/hub-datacube

This revision is funded primarily through BELSPO (the Belgian Science Policy Office) in the framework of the STEREO III Programme – Project LUMOS - SR/01/321.

Logo’s were created for free at https://logomakr.com.

Software Licence

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or any later version.

What is new in the Spectral Library Tool 1.0?

Differences between Viper Tools 2.0 and The Spectral Library Tool 1.0:

• The migration to PyQGIS is not just a translation from IDL to Python, but also a serious re-write of the code and a revision of the GUI to match the look and feel of other QGIS tools.

• Library Creation has been revised thoroughly, with integration of GIS: inside QGIS, a spectral library is now represented as a vector layer and each spectrum as a feature. This makes it easier to select spectra from a map, use polygons for selection and manage features and their metadata via the attribute table.

• Library Creation now also has extra features to import and save spectral libraries (from raster or vector sources, from ASD, CSV, ARTMO, ECOSIS, ENVI en SPECCHIO).

• The output of the Library Optimization tools has been optimized, breaking backwards compatibility with the IDL tools.

• The EMC tool also allows for square arrays that have been run in non-reset mode.