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Date: Wed, 6 Jun 2012 08:42:28 -0500 (CDT)
From: Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
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Cc: TIFF <tiff@lists.maptools.org>
Subject: Re: [Tiff] Custom and EXIF directory read/write
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A common expectation/requirement is to be able to take an EXIF chunk 
from JPEG and put it in TIFF, or vice-versa.  The method you describe 
seems to require that the application/user add tags one by one so it 
is necessary to parse the EXIF blob fully in order to transfer it into 
TIFF.  Is there a possibility of extracting an EXIF "blob" from TIFF 
or inserting an EXIF "blob" into TIFF?  This would require fixup of 
the IFD offsets since the offsets are treated differently in JPEG and 
TIFF.

Bob
-- 
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
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