AWARE [SYSTEMS] Imaging expertise for the Delphi developer
AWare Systems, Imaging expertise for the Delphi developer, Home TIFF and LibTiff Mailing List Archive

LibTiff Mailing List

TIFF and LibTiff Mailing List Archive
September 1994

Previous Thread
Next Thread

Previous by Thread
Next by Thread

Previous by Date
Next by Date

Contact

The TIFF Mailing List Homepage
This list is run by Frank Warmerdam
Archive maintained by AWare Systems



Valid HTML 4.01!



Thread

1994.09.20 03:03 "TIFF CIEL*a*b* Question (with Answer)", by John M Davison
1994.09.20 07:53 "Re: TIFF CIEL*a*b* Question (with Answer)", by Fredrik Lundh
1994.09.22 08:31 "Re: TIFF CIEL*a*b* Question (with Answer)", by Karsten Spang
1994.09.22 10:13 "A note on (group4) compatibility issues", by Fredrik Lundh
1994.09.22 14:48 "Re: TIFF CIEL*a*b* Question (with Answer)", by Craig Jackson
1994.09.22 15:19 "Re: TIFF CIEL*a*b* Question (with Answer)", by Sam Leffler

1994.09.22 08:31 "Re: TIFF CIEL*a*b* Question (with Answer)", by Karsten Spang

In message <9409200753.AA10921@kalle.ivab.se> ,
Fredrik Lundh <fredrik@kalle.teragon.ivab.se>  writes:

>But don't ship such files outside your office...  When using
>Compression=3 or 4, I'd stick to SamplesPerPixel=1,
>PhotometricInterpretation=0, and RowsPerStrip=ImageLength!
                                  +++++++++++++++++++++++++
WHAT? You can't be serious! What if your ImageLength and ImageWidth is
10000, 20000, or more? For G3 compression you should stick to the "8k" rule
for RowsPerStrip. For G4 this may ruin your compression rate; if you have
only one or two scan lines in a strip, 2D compression does not make much 
sense, in this case you should be more lax about the "8k" rule, and use
at least (say) 100 scan lines per strip.

                                 Karsten 
--------------------------------------------------------------------------------
E-mail: krs@kampsax.dk                                      Karsten Spang
Phone:  +45 36 77 22 23                                     Kampsax Data
Fax:    +45 36 77 03 01                                     P.O. Box 1142
                                                            DK-2650 Hvidovre
                                                            Denmark