Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado
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/
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