AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

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2004.09.28 21:09 "[Tiff] TIFFTAG_PREDICTOR", by Ian Ameline
2004.09.28 22:02 "Re: [Tiff] TIFFTAG_PREDICTOR", by Chris Cox
2004.09.28 22:52 "Re: [Tiff] TIFFTAG_PREDICTOR", by Joris

2004.09.28 21:09 "[Tiff] TIFFTAG_PREDICTOR", by Ian Ameline

In the docs at;

http://www.awaresystems.be/imaging/tiff/tifftags/predictor.html

There is the strong implication that the predictor only does anything when using LZW compression. Can someone here answer the question; What compression schemes is the predictor enabled? (Breakpointing the predictor code and running shows that it works for ADOBE_DEFLATE, and for my images, this is a good thing -- they compress better with the predictor on).

Perhaps the documentation at the page referenced above should be updated to accurately reflect which compression schemes the predictor supports.

--
Regards,
Ian Ameline,

Software Architect,
Alias SketchBook Technical Lead.

-- Always do the right thing. This will gratify
some people and astonish the rest. -- Mark Twain.