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Re: Subset Image [message #45636 is a reply to message #45478]

Sat, 17 September 2005 10:32

Julio[1]
Messages: 52
Registered: May 2005

Member

Actually, I don't have the ROIs yet. What I want is to subset the image
using the limits of a vector file (EVF or DXF). I think it could be
carried out using ROIs, but I'm not sure about that. I'll take a look
on XROI...
Do you have some idea to make that without using ROIs?

Júlio

Jeff N. escreveu:

> The 'subset via ROI' function in ENVI sets every pixel outside of the
> ROI to zero right? There are actually lots of ways to do this with
> IDL. The answer really depends on your ROI. If your ROI is
> rectangular, you can do it with array subscripting. If your ROI is an
> irregular shape, you would probably use the WHERE() function. Are you
> planning to draw the ROI's with IDL too? If so, you might try XROI.
>
> Jeff
>
>
> Julio wrote:
>> Hi,
>>
>> I want to subset the image using ROIs. I can't use SUB_RECT because I
>> don't know the limits (columns, rows) of each subset (it is specified
>> by ROIs).
>> Thanks at any rate,
>> Julio

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[Message index]

		Subset Image By: Julio[1] on Thu, 15 September 2005 12:20
		Re: Subset Image By: Jeff N. on Sun, 18 September 2005 20:20
		Re: Subset Image By: Julio[1] on Sun, 18 September 2005 15:10
		Re: Subset Image By: Jeff N. on Sun, 18 September 2005 14:04
		Re: Subset Image By: Julio[1] on Sun, 18 September 2005 11:58
		Re: Subset Image By: Jeff N. on Sat, 17 September 2005 15:22
		Re: Subset Image By: Julio[1] on Sat, 17 September 2005 10:32

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