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Re: Writing Large Tiff Image file with Write_tiff [message #46313] Fri, 18 November 2005 06:28
wita is currently offline  wita
Messages: 43
Registered: January 2005
Member
Hi Raval,

Writing the result to disk is a bit tricky indeed because you cannot
store the results sequentially in chunks of 1024,1024 to disk. The
simplest option would be to dump the TIFF to generic binary and read it
using the ASSOC() function in chuncks of 10000 by let's say 100. Then
you can equalize each chunk seperately again and write them to disk
sequentially using a simple WRITEU. Then you can treat it as a simple
generic binary image (without headers or anything) and use whatever
program to convert it to TIFF again.

Note that HIST_EQUAL will equalize each chunk separately, so you may
get weird result as a result of different equalisation of each chunk.
If you have ENVI available I suggest you use it because equalisation
can be done by ENVI much easier.

best regards,

Allard

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