Wish List - Resource ID 988: Wish #26

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Jeroen Arends

Possibility to import spectral signatures in order to be able to use them in image analysis, classification, etc.. And the possibility to export spectral signatures

First of all, I want to say I really appreciate MultiSpec! A great application that is not only good for educational purposes but to also conduct research with. It is light weight so easy on the computer resources and through its user friendly and easy to learn GUI separates the user from the complex algorithms used to conduct clustering, classification, etc. Great tool to analyze hyperspectral images with. Great effort by Dr Biehl and Dr. Landgrebe.

I don't know the ins and outs of MultiSpec completely -nor of the algorithms, etc.- but what I think would be perhaps useful is a function to import spectral signatures from a range of sources and formats (such as the USGS spectral libary, ECOSTRESS library -formerly known as ASTER, .csv, etc.) and be able to use these signatures in image analysis and classification. I think it would also be useful to be able to export spectral signatures in a range of formats including .csv so they can be loaded in other applications.

I assume that this is quite a daunting task to programme but for me it would be useful functionality.

Thank you and kind regards,

Jeroen Arends


Hi Jeroen,

Thanks for your comments and suggestions. I am not sure how I would implement it. It looks like the libraries are organized in different ways.  Data from the LARS Field Research Data Base is at:  https://www.lars.purdue.edu/home/FRData/field_research_data.html. I tell you this because, for many years I had folks send me requests for ‘The' spectral signature of corn and soybeans.  I would ask them what development stage, soil background, row direction/sun angle combination, hybrid, ground cover, etc.  The point I was trying to get across for them was that there was no such thing as one ’signature’ for corn or soybeans.  It all depends. One always has to consider this when working with spectral libraries. Now it does make more sense for minerals which have diagnostics spectral absorption features.

I am not sure what your application is. Can you describe a scenario of what image data, spectral data base, application, and the process that you would use for the analysis. It might help me determine what could be done?  

Note that one can save the class statistics to a text file using the Project window List Statistics control when in the class list mode. The data will be in order and channel separated by tabs so that you can copy and past into a spreadsheet. If you are using the desktop versions you can copy directly from the text window and paste in a spreadsheet or word document. I know this is not exactly what you are requesting to save as a csv file, but it is similar.

- Larry Biehl

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