- 2007.07.03 19:04 "Re: [Tiff] BigTIFF extension?", by Stephen Carlsen
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2007.07.03 19:09 "Re: [Tiff] BigTIFF extension?", by Bob Friesenhahn
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2007.07.04 15:58 "Re: [Tiff] BigTIFF extension?", by Phil Harvey
- 2007.07.04 11:37 "Re: [Tiff] BigTIFF extension?", by Phil Harvey
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2007.07.04 17:13 "[Tiff] 16-Bit-Per-Channel Lossless Compression", by Stephen Carlsen
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2007.07.04 17:24 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Andy Cave
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2007.07.04 17:26 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Andy Cave
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2007.07.04 17:49 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Stephen Carlsen
- 2007.07.04 18:00 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Joris Van Damme
- 2007.07.04 20:37 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Andy Cave
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2007.07.05 10:56 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Andrey Kiselev
- 2007.07.05 12:03 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Andy Cave
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2007.07.05 17:58 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Stephen Carlsen
- 2007.07.04 18:02 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Joris Van Damme
- 2007.07.05 18:30 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Joris Van Damme
- 2007.07.06 01:46 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Chris Cox
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2007.07.04 17:49 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Stephen Carlsen
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2007.07.04 17:26 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Andy Cave
- 2007.07.04 17:28 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Michael Wolf
- 2007.07.04 17:36 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Andrew Brooks
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2007.07.04 17:24 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Andy Cave
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2007.07.04 15:58 "Re: [Tiff] BigTIFF extension?", by Phil Harvey
- 2007.07.03 19:17 "Re: [Tiff] BigTIFF extension?", by Andy Cave
- 2007.07.04 11:53 "Re: [Tiff] BigTIFF extension?", by Phil Harvey
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2007.07.04 20:52 "Re: [Tiff] BigTIFF extension", by Joris Van Damme
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2007.07.04 21:04 "Re: [Tiff] BigTIFF extension", by Toby Thain
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2007.07.05 05:07 "Re: [Tiff] BigTIFF extension", by Joris Van Damme
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2007.07.05 08:09 "Re: [Tiff] BigTIFF extension", by Andy Cave
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2007.07.05 13:40 "Re: [Tiff] BigTIFF extension", by Joris Van Damme
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2007.07.05 21:00 "Re: [Tiff] BigTIFF extension", by Chris Cox
- 2007.07.05 21:19 "Re: [Tiff] BigTIFF extension", by Joris Van Damme
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2007.07.05 22:13 "Re: [Tiff] BigTIFF extension", by Bob Friesenhahn
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2007.08.06 22:48 "RE: [Tiff] Transparency ... associated or unassociated alpha is morecompatible?", by Chris Cox
- 2007.08.06 22:32 "RE: [Tiff] Transparency ... associated or unassociated alpha is morecompatible?", by Chris Cox
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2007.08.06 22:48 "RE: [Tiff] Transparency ... associated or unassociated alpha is morecompatible?", by Chris Cox
- 2007.07.06 12:36 "Re: [Tiff] BigTIFF extension", by Gary McGath
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2007.07.05 21:00 "Re: [Tiff] BigTIFF extension", by Chris Cox
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2007.07.05 13:40 "Re: [Tiff] BigTIFF extension", by Joris Van Damme
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2007.07.05 08:09 "Re: [Tiff] BigTIFF extension", by Andy Cave
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2007.07.05 16:26 "Re: [Tiff] BigTIFF extension", by Joris Van Damme
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2007.07.05 04:19 "RE: [Tiff] BigTIFF extension", by Kemp Watson
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2007.07.04 16:56 "[Tiff] BigTIFF extension", by Kemp Watson
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2007.07.04 17:35 "Re: [Tiff] BigTIFF extension", by Andrew Brooks
- 2007.07.04 18:13 "Re: [Tiff] BigTIFF extension", by John Aldridge
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2007.07.04 18:25 "Re: [Tiff] BigTIFF extension", by Phil Harvey
- 2007.07.04 18:52 "Re: [Tiff] BigTIFF extension", by Toby Thain
- 2007.07.04 19:17 "Re: [Tiff] BigTIFF extension", by Frank Warmerdam
- 2007.07.05 20:31 "Re: [Tiff] BigTIFF extension", by Chris Cox
- 2007.07.05 15:14 "[Tiff] BigTIFF - Aware Aperio version diff", by Kemp Watson
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2007.07.04 17:35 "Re: [Tiff] BigTIFF extension", by Andrew Brooks
- 2007.07.05 04:54 "RE: [Tiff] BigTIFF extension", by Stephen Carlsen
- 2007.07.05 16:32 "RE: [Tiff] BigTIFF extension", by Kemp Watson
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2007.07.04 16:56 "[Tiff] BigTIFF extension", by Kemp Watson
- 2007.07.05 18:56 "Re: [Tiff] BigTIFF extension", by Toby Thain
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2007.07.05 04:19 "RE: [Tiff] BigTIFF extension", by Kemp Watson
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2007.07.05 05:07 "Re: [Tiff] BigTIFF extension", by Joris Van Damme
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2007.07.05 10:06 "Re: [Tiff] BigTIFF extension", by John Aldridge
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2007.07.05 13:23 "[Tiff] Re: Tiff Digest, Vol 38, Issue 12", by Gary McGath
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2007.07.05 13:56 "Re: [Tiff] Re: Tiff Digest, Vol 38, Issue 12", by Joris Van Damme
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2007.07.05 14:14 "Re: [Tiff] Re: Tiff Digest, Vol 38, Issue 12", by Gary McGath
- 2007.07.05 14:39 "Re: [Tiff] Re: Tiff Digest, Vol 38, Issue 12", by Joris Van Damme
- 2007.07.05 15:26 "Re: [Tiff] Re: Tiff Digest, Vol 38, Issue 12", by Andrey Kiselev
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2007.07.05 14:14 "Re: [Tiff] Re: Tiff Digest, Vol 38, Issue 12", by Gary McGath
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2007.07.05 13:56 "Re: [Tiff] Re: Tiff Digest, Vol 38, Issue 12", by Joris Van Damme
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2007.07.05 13:23 "[Tiff] Re: Tiff Digest, Vol 38, Issue 12", by Gary McGath
- 2007.07.05 16:51 "Re: [Tiff] BigTIFF extension", by Andrew Brooks
- 2007.07.09 16:11 "Re: [Tiff] BigTIFF extension", by Stephen Carlsen
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2007.07.04 21:04 "Re: [Tiff] BigTIFF extension", by Toby Thain
2007.07.04 17:26 "Re: [Tiff] 16-Bit-Per-Channel Lossless Compression", by Andy Cave
PS With LZW, have you tried with prediction enabled? That should improve the compression ratio on 16 bit ints.
----- Original Message -----
From: "Andy Cave" <andy.cave@hamillroad.com> To: <tiff@lists.maptools.org>; "Stephen Carlsen" <sc42business@mac.com> Sent: Wednesday, July 04, 2007 6:24 PM Subject: Re: [Tiff] 16-Bit-Per-Channel Lossless Compression
Are you saying that LZW or Flate do not get 2:1? Have you tried either of these? What ratios do you get?
Do you have some example files for testing with?
I think if you can compress and write to disk faster than you can write, compression is always worth it. Sure storage space is getting larger and faster, but then CPUs are getting more and more cores, which can nicely do compression in parallel.
It seems to me that none of the lossless compression schemes commonly used in TIFF are very effective at compressing 16 bit or 32 bit data. And, with technologies such as Camera Raw gaining in popularity rapidly, there's a lot more 16 bit data out there.
If we can come up with a simple approach that gives us on the order of 2:1 compression of 16 bit photographs, is this useful, or are storage space and bandwidth now so inexpensive that we don't care any more?