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Last Post 05 Jul 2009 01:53 AM by  anon
Spectral Hourglass Wizard
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anon



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05 Jul 2009 01:53 AM
    Hello   I am new to using ENVI. Am analyzing hyperion data using the spectral hourglass wizard and have some issues. Firstly, am getting an erroneous PPI image composed of white dots uniformy spaced in alternate rows. What can be the problem? Secondly, i don't know how to use the MTMF and SMA results for classification. Lastly, in the last stage ENVI is not outputting the SAM results with an error message that says : Keyword VISIBLE_PTR not allowed in call to WIDGET_PMENU. Thanks Neeraj Garg Baruah The Energy & Resources Institute (TERI) India      

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    06 Jul 2009 07:41 PM
    Hi Neeraj, I might know the reason of your first problem. Maybe the volume of memory you allocated for PPI is a little small. Especially if you are using the default volume of 10 Mb and your image is relatively large, I guess the program will use a subset of your original image to do PPI projection. Besides, you can try to change the number of iterations because too little iterations maybe output poor results. I hope that is the reason of your problem. I do not understand your meaning of second question. I do not know the reason of your third problem. Lin
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