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Re: How to subset many images in batch mode? [message #52279 is a reply to message #52265]

Wed, 24 January 2007 00:35

kavin
Messages: 5
Registered: December 2006

Junior Member

yeah,I want to use a smaller image as mask to subset many big images
automatically.
It's a heave work.
I want to know that does there exist any ENVI routine to accomplish my
task automated?

On 1月24日, 上午1时36分, "Jean H."
<jghas...@DELTHIS.ucalgary.ANDTHIS.ca> wrote:
> 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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