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TIFF and LibTiff Mail List Archive

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2005.09.23 21:11 "[Tiff] Additional Lossless Compression Schemes", by Frank Warmerdam
2005.09.23 21:20 "Re: [Tiff] Additional Lossless Compression Schemes", by Bob Friesenhahn
2005.09.23 22:20 "Re: [Tiff] Additional Lossless Compression Schemes", by Chris Cox
2005.09.23 23:32 "RE: [Tiff] Additional Lossless Compression Schemes", by Philip Watkinson
2005.09.25 01:28 "Re: [Tiff] Additional Lossless Compression Schemes", by Joris
2005.09.27 01:05 "Re: [Tiff] Additional Lossless Compression Schemes", by Ron
[...]

2005.09.23 21:11 "[Tiff] Additional Lossless Compression Schemes", by Frank Warmerdam

Folks,

I was wondering if there is much interest in adding more lossless compression schemes in libtiff.

In addition to Packbits (pretty crappy) we have LZW and the more recent Deflate. My understanding is that Deflate is usually better than the old LZW though not as widely supported. Also, that Deflate is essentially the "zip" compression type.

Since then I have seen "gzip" on Unix, but I am not clear if that is just deflate or not.

Then came bzip2 which seem 5-10% better in that gzip on many datasets.

Now looking around a bit I see LZMA which I have heard good things about.

   http://www.7-zip.org/sdk.html

Are there any opinions on possibly incorporating LZMA as an additional compression type?

Best regards,
--

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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam@pobox.com
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