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TIFF and LibTiff Mail List Archive

Thread

1999.11.30 22:23 "libtiff 3.5.3 release.", by Michael L. Welles
1999.11.30 22:53 "Re: libtiff 3.5.3 release.", by Izumi Ohzawa
1999.11.30 23:07 "Re: libtiff 3.5.3 release.", by Tom Lane
1999.12.01 00:08 "Re: libtiff 3.5.3 release.", by Michael L. Welles
1999.11.30 23:22 "Re: libtiff 3.5.3 release.", by Daniel McCoy
1999.12.01 13:56 "Re: libtiff 3.5.3 release.", by Bruce Cameron
1999.12.01 18:35 "Re: libtiff 3.5.3 release.", by Daniel McCoy
1999.12.02 07:06 "", by Ruediger
1999.12.01 03:15 "Re: libtiff 3.5.3 release.", by Bob Friesenhahn
1999.12.01 16:04 "Re: libtiff 3.5.3 release.", by Michael L. Welles
1999.12.01 16:43 "Re: libtiff 3.5.3 release.", by Tom Lane
1999.11.30 23:07 "Re: libtiff 3.5.3 release.", by Martin Bailey
1999.12.01 14:08 "Re: libtiff 3.5.3 release.", by Bruce Cameron
1999.12.01 15:02 "Re: libtiff 3.5.3 release.", by Klaus Bartz
1999.12.01 16:17 "RE: libtiff 3.5.3 release.", by Peter Smith
1999.12.01 16:49 "RE: libtiff 3.5.3 release.", by Darrin Cardani
1999.12.01 19:20 "Re: libtiff 3.5.3 release.", by Chris Hanson
1999.12.01 14:33 "Re: libtiff 3.5.3 release.", by Andy
1999.12.01 14:42 "ZIP compression [was: libtiff 3.5.3 release.]", by Tom Kacvinsky
1999.12.01 15:24 "Re: ZIP compression [was: libtiff 3.5.3 release.]", by Leonard Rosenthol
1999.12.01 15:51 "Re: ZIP compression [was: libtiff 3.5.3 release.]", by Tom Kacvinsky
1999.12.01 18:04 "Re: ZIP compression [was: libtiff 3.5.3 release.]", by Bryan H. Maret
1999.12.02 05:16 "Re: ZIP compression [was: libtiff 3.5.3 release.]", by Leonard Rosenthol
1999.12.01 17:39 "Re: ZIP compression [was: libtiff 3.5.3 release.]", by Bryan H. Maret
1999.12.02 11:42 "Re: ZIP compression [was: libtiff 3.5.3 release.]", by Ivo Penzar
1999.12.06 20:42 "Re: ZIP compression [was: libtiff 3.5.3 release.]", by Andy

1999.11.30 23:07 "Re: libtiff 3.5.3 release.", by Martin Bailey

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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