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January 2006
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2006.01.04 22:00 "Re: Reading TIFF(CMYK)", by Dwight Kelly
> > > 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. Hello, I'd be happy to write a C routine with a demo application for you to split CMYK TIFF (all types) into 4 grayscale TIFF. It shouldn't take more than a couple of hours. Sincerely, -- Dwight Kelly Apago, Inc. 4080 McGinnis Ferry Rd Suite 601 Alpharetta, GA 30005 voice:(770) 619-1884 fax:(770) 619-1885 email: dkelly@apago.com web: http://www.apago.com