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Principle Componets Analysis [message #55522]

Thu, 23 August 2007 11:27

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Folks,

Is it just me, or is this turning into an ENVI forum...

I have three bands of a Landsat image. They come in
three separate files (GEOTIFF). I have opened all three
in ENVI. I wish to perform a principle components analysis
of these three images, and capture the first principle
component for further analysis.

ENVI seems to want to have these three images in the
same file or something. In any case, I can't work out
how to get these three images into the PC apparatus.
Perhaps if I could make a new ENVI image of these three
bands? What if I wanted to do the analysis with four image
bands?

Any help appreciated.

Thanks,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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Re: Principle Componets Analysis [message #90396 is a reply to message #55522]

Fri, 27 February 2015 13:54

youssouph.cissokho
Messages: 1
Registered: February 2015

Junior Member

On Thursday, August 23, 2007 at 6:27:15 PM UTC, Coyote wrote:
> Folks,
>
> Is it just me, or is this turning into an ENVI forum...
>
> I have three bands of a Landsat image. They come in
> three separate files (GEOTIFF). I have opened all three
> in ENVI. I wish to perform a principle components analysis
> of these three images, and capture the first principle
> component for further analysis.
>
> ENVI seems to want to have these three images in the
> same file or something. In any case, I can't work out
> how to get these three images into the PC apparatus.
> Perhaps if I could make a new ENVI image of these three
> bands? What if I wanted to do the analysis with four image
> bands?
>
> Any help appreciated.
>
> Thanks,
>
> David
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming: http://www.dfanning.com/

Hi guys, thank for your job, I'm interest about the PCA method apply to the images may you please explain to me in more details this part? thanks

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