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Re: Large TIFF file question [message #28830 is a reply to message #28829]

Tue, 15 January 2002 20:39

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

"Dick Jackson" <dick@d-jackson.com> writes:

> "Neil Talsania" <talsania@kodak.com> wrote in message
> news:a228o1$4n6$1@news.kodak.com...
>> Hi,
>> I have what should be a simple question (I hope!). I am trying to run an
>> IDL routine that was given to me. The routine has run successfully on
> small
>> images, but when I try to run it on my 1.5 Gig image it fails on the
> memory
>> allocation.
>>
>> Looking at the code, it does the following:
>>
>> a = float(read_tiff(filename).
>
...
> Perhaps this is the problem, and you may need to get creative to find a
> solution. (subsampling the array for further use?)

Or, how about reading only a portion of the image at a time using the
SUB_RECT keyword. This is a technique known as tiling, and of course
the slightly more difficult part is the logic to stitch together
the tiles at the end.

Craig

--
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Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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[Message index]

		Re: Large TIFF file question By: David Fanning on Wed, 16 January 2002 05:24
		Re: Large TIFF file question By: Martin Downing on Wed, 16 January 2002 01:17
		Re: Large TIFF file question By: Craig Markwardt on Tue, 15 January 2002 20:39
		Re: Large TIFF file question By: Dick Jackson on Tue, 15 January 2002 15:06
		Re: Large TIFF file question By: bowman on Tue, 15 January 2002 14:13
		Re: Large TIFF file question By: Mark Rivers on Wed, 16 January 2002 06:54

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