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Re: How to subset many images in batch mode? [message #52282 is a reply to message #52279]

Tue, 23 January 2007 09:36

Jean H.
Messages: 472
Registered: July 2006

Senior Member

kavin wrote:
> Hi,everyone!
>
> I want to subset many images with one smaller image in batch mode,but I
> can not find the right command to fulfill it.
> waiting for the answers....................
>

So you mean you have one small image that you want to use as a mask?

1) get the corners coordinates of your "small image"
2) convert them to the pixel coordinate of your "big image" (in ENVI I
believe)
3) Find the cells that are within this area, using POLYFILL
4) subset your image using the indices from #3 newImage =
bigImage[indices]
5) if your "big images" have the same characteristics, use the indices
you found in #3 for all of them. If not, go to #2

Jean

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[Message index]

		Re: How to subset many images in batch mode? By: kavin on Wed, 24 January 2007 22:29
		Re: How to subset many images in batch mode? By: Jean H. on Wed, 24 January 2007 09:57
		Re: How to subset many images in batch mode? By: kavin on Wed, 24 January 2007 00:35
		Re: How to subset many images in batch mode? By: Jean H. on Tue, 23 January 2007 09:36
		Re: How to subset many images in batch mode? By: James Kuyper on Tue, 23 January 2007 09:24
		Re: How to subset many images in batch mode? By: David Fanning on Tue, 23 January 2007 06:34

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