Message-ID: 3.0.5.32.19991130230733.00b22520@mailhost.cam.harlequin.co.uk
To: tiff@olympiakos.com
Subject: Re: libtiff 3.5.3 release.
From: Martin Bailey <martinb@harlequin.co.uk>
Date: Tue, 30 Nov 1999 23:07:33 +0000
In-Reply-To: <E11svfy-0003Tm-00@kurtz.fake>
Sender: owner-tiff@olympiakos.com


At 17:23 30/11/99 -0500, Michael L. Welles wrote:

>Unfortunatly, the compression removal means that saved image size has
>grown dramatically.  Without a change in the TIFF spec to support
>another lossless compression format, this is unavoidable.
>
>The library can use zip for lossless compression (thanks, Sam!), but
>as this is not part of the spec, TIFFs using zip compression may not
>work with other software. 

At present the only specification for ZIP in TIFF would appear to be the
code in LibTIFF, so only applications built around LibTIFF will support ZIP.

If somebody were to produce a text specification, akin to the draft tech
note 2 that defined the used of Compression=7 for new format JPEG, then
it's possible that more software would be written to support ZIP in TIFF.

I realise that this reinforces a two-level specification, which is not a
good thing, but it may also provide a little pressure in the right places
for things to be moved on in a more 'official' way.



Regards

Martin Bailey

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