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January 2006
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2006.01.04 21:59 "Re: Reading TIFF(CMYK)", by Kai-uwe Behrmann
> > it's possible to read only one color chanel from tiff(CMYK) let say cyan
> > and save it as greyscale?
>
> All CMYK TIFF files should been PHOTOMETRIC_SEPARATED & SAMPLESPERPIXEL == 4.
I would not rely on the later. There are Cmyk images out with 1-bit,
indexed 8-bit, 8-8-8-8 (as suggested in the spec) and 16-bit per
sample, makes a variance of 4 to 64 bit per pixel. Sometimes colour planes
are allready in separate files, which is what I expect will be the target
of Arkadiusz.
Photoshop for instance writes 16-bit per sample Cmyk tiffs.
regards
Kai-Uwe Behrmann
+ development for color management
+ imaging / panoramas
+ email: ku.b@gmx.de
+ http://www.behrmann.name