Hi, Roger Breton wrote:
I tried cctiff this morning. Any reason why the term "photometric" is used as opposed, I guess, to "perceptual"? For example, toward the end of the comments, I got :Using TIFF photometric 'Separated'
That's just a detail of the TIFF format being displayed - nothing to do with the actual colour management. The term photometric just refers to how the data inside the TIFF file is interpreted - including the colour space.
The most commonly encountered values for the PHOTOMETRIC_INTERPRETATION TIFF Tag are PHOTOMETRIC_RGB, PHOTOMETRIC_MINISWHITE (greyscale, 0->white), PHOTOMETRIC_MINISBLACK (greyscale, 0->black), and the one you're seeing - PHOTOMETRIC_SEPARATED (usually CMYK, but used for any "exotic" colour system for which there isn't separately defined value.)
All the best, -- Alastair M. Robinson
