comp.lang.idl-pvwave archive: archive » Re: How to subset many images in batch mode?

Home » Public Forums » archive » Re: How to subset many images in batch mode?

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: How to subset many images in batch mode? [message #52265 is a reply to message #52261]

Wed, 24 January 2007 09:57

Jean H.
Messages: 472
Registered: July 2006

Senior Member

kavin wrote:
> 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?

I don't think there is 1 function for this... so you will have to
implement the 4 steps described below!

Jean

>
> On 1锟斤拷24锟斤拷, 锟斤拷锟斤拷1时36锟斤拷, "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
>
>

Report message to a moderator

[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

Previous Topic:	Re: print wrong characters
Next Topic:	read VTK files with IDL

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Thu Oct 09 23:41:54 PDT 2025

Total time taken to generate the page: 2.08219 seconds