2002.07.10 18:34 "YCCK photometric?", by Dwight Kelly

2002.07.11 04:22 "Re: YCCK photometric?", by Tom Lane

The recently published Adobe Photoshop TIFF Technote indicates that the photometric must matched the jpeg compressed data so YCCK can't be used.

That is correct - YCCK is not valid in TIFF.

And the technote for JPEG in TIFF that covers that restriction is quite old.

I had hoped that the next TIFF spec revision would add a PhotometricInterpretation value for YCCK, thus allowing the requested behavior in a clean fashion. I take it that the above-quoted technote doesn't do that?

regards, tom lane
organizer, Independent JPEG Group