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Programmatically subset one image using ENVI routines. [message #49684]

Tue, 08 August 2006 05:09

txominhermos
Messages: 25
Registered: October 2005

Junior Member

Hi mates, I have a big image, so I just can use ENVI routines to avoid
the RAM memory saturation. I would like to subset an image with a given
pixel coordinates.

I would like to output the image to TIFF, so I have tried to do it
directly:

ENVI_OUTPUT_TO_EXTERNAL_FORMAT, dims = [-1, min_s, max_s-min_s+1,
min_l, max_l-min_l+1], /TIFF, FID=fid,$
pos=pos, out_name='c:\cir.tif'

where min_s, max_s, min_l, max_l are the pixels which are limits to
perform the subset.

I thought that I had to indicate the limits in DIMS, but it seems not
to work.

Do you know how to do it? I don't mind use ENVI_WRITE_ENVI_FILE if it
is not possible with ENVI_OUTPUT_TO_EXTERNAL_FORMAT.

Thanks for your attention

-txomin

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