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TIFF and LibTiff Mail List Archive

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1994.12.14 22:00 "JBIG compression", by Kyriakos Georgiou
1994.12.14 23:51 "Re: JBIG compression", by Sam Leffler
1994.12.16 18:00 "Re: JBIG compression", by Fredrik Lundh
1994.12.16 21:02 "Re: JBIG compression", by Kyriakos Georgiou
1994.12.16 21:17 "Re: JBIG compression", by Sam Leffler
1994.12.16 22:04 "Re: JBIG compression", by Rick Richardson
1994.12.16 22:18 "Re: JBIG compression (really G3/G4 decompression)", by Sam Leffler
1994.12.15 09:59 "Further G4 improvement", by Karsten Spang

1994.12.14 22:00 "JBIG compression", by Kyriakos Georgiou

Is there anybody that is working on JBIG compression/decompression? (besides Image Magic, MA USA)

Also, can the current libtiff G4 decompression implementation be improved? What sort of improvements can be expected?

I was surprised to find a reference to J.D.Murray, W.vanRyper, "Encyclopedia of Graphics File Formats", O'Reilly & Associates, Inc. 1994, pp.148 which stated that some implementations of G4 encode as fast as G3, and decode even faster.

I don't want to get into algorithmic issues, my question is, is there room for >15% improvement on G4 for the impelmentation of libtiff?

K.Georgiou
RIT Research Corp.