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Last Post 10 Apr 2009 08:14 PM by  anon
help in feature extraction in ENVI Zoom
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anon



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10 Apr 2009 08:14 PM
    Hello, I read the reference from ENVI Zoom Help file "Implementation of a fast algorithm for segmenting SAR imagery"  but the efficiency of my program is really low. A image of 1000*1000 pixel , I have to iterate the calculation procedure for about 1 million times, about 20,000 seconds or 10 + hours, But in ENVI, it only require 10+ seconds, to do the same work. Could you give some suggestion or tip to implementation this fast algorithm for segmenting provided by Robinson? thank you

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    13 Apr 2009 09:23 AM
    So, you are looking for advice for implementing the Full Lambda-Schedule algorithm created by Robinson, Redding and Crisp (2002) outside of ENVI?  I am afraid that ITT VIS is not able to give tips about how we implement routines in the ENVI source code. Or is the question how to implement the Full Lambda-Schedule algorithm using ENVI batch routines?  If so, I am afraid that this algorithm isn't provided via any ENVI programming routines in the current version.  You could contact ITT VIS Technical Support at support@ittvis.com to log a request to provide an ENVI programming routine to implement this algoirthm in a future version of ENVI. Sorry I can't be more help. Peg
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