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TIFF and LibTiff Mail List Archive

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

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

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