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ENVI Classification Image to ROIs [message #56656]

Wed, 07 November 2007 18:58

charliehemlock
Messages: 1
Registered: November 2007

Junior Member

Hi,

I'm looking for an easy way to take an ENVI Classification Image and
take each class from it and export each as a separate ROI. (I'm not
creating a classification from roi's - the opposite)

I could use "band threshold from ROI" - but this is time consuming if
you have several classes and images. It seems like there should be an
easy way to do this...hopefully there's a simple solution out there
that I'm just missing.

I'm using envi 4.3

Thanks!

CH

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Re: ENVI classification [message #60573 is a reply to message #56656]

Tue, 03 June 2008 09:30

peter.eddy@shaw.ca
Messages: 19
Registered: March 2005

Junior Member

You might want to take a look at 'ROI_Thresh_DoIt'. You could loop
over your classes setting the min/max thresh keywords to the class
number. This would create one roi for each class.

Pete

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Re: ENVI classification [message #60582 is a reply to message #56656]

Mon, 02 June 2008 14:08

jeffnettles4870
Messages: 111
Registered: October 2006

Senior Member

On Jun 2, 4:31 am, Kostas <ko...@freemail.gr> wrote:
> Dear, all
>
> I want to ask a question about classification via ENVI
>
> AFTER classifying an image with supervised classificaton (K-Means, ISO-
> DATA) how can i export clusters to roi's programmaticaly???
>
> Thank You
>
> Kostas

I think that the basic idea of the solution to your problem is
probably going to be to feed the indices of whatever pixels you want
in an ROI to ENVI_DEFINE_ROI (after setting up the ROI with
ENVI_CREATE_ROI). Getting those indices probably isn't all that hard
either, it just depends on what you mean by "clusters" :)

Jeff

Jeff

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