2002.09.30 21:46 "Re: Correct way of creating CMY TIFF file ?", by Chris Cox
Sorry, Photoshop doesn't do CMY, only CMYK.
In this case, you should make the image CMYK with a blank K channel.
Is there a way of creating a "standard" CMY TIFF file?
For a CMYK file, setting TIFFTAG_PHOTOMETRIC to PHOTOMETRIC_SEPARATED and TIFFTAG_SAMPLESPERPIXEL to 4 seems to work OK, but trying
TIFFTAG_PHOTOMETRIC to PHOTOMETRIC_SEPARATED and TIFFTAG_SAMPLESPERPIXEL to 3 creates a file that (for instance), photoshop doesn't recognize.
Given TIFF has a PHOTOMETRIC_RGB, _YCBCR, _CIELAB tags, why doesn't TIFF have _CMY, _CMYK etc. tags?