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 Van Damme

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.