AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2005.04.28 13:40 "[Tiff] Delphi 7, TIFF G3/4, Multipage", by Matthias Lach
2005.04.29 16:09 "Re: [Tiff] Delphi 7, TIFF G3/4, Multipage", by Joris
2005.05.02 16:12 "RE: [Tiff] Color TIFF/JPEG compression questions", by Frank, Jason
2005.05.02 13:44 "RE: [Tiff] Color TIFF/JPEG compression questions", by Grissom, Ed
2005.05.02 14:16 "Re: [Tiff] Color TIFF/JPEG compression questions", by Joris
2005.05.02 16:29 "RE: [Tiff] Color TIFF/JPEG compression questions", by Frank, Jason
2005.05.02 17:55 "Re: [Tiff] Color TIFF/JPEG compression questions", by Joris
2005.05.02 18:17 "RE: [Tiff] Color TIFF/JPEG compression questions", by Frank, Jason

2005.05.02 13:44 "RE: [Tiff] Color TIFF/JPEG compression questions", by Grissom, Ed

When an image shows up with blasted out pink and green, I always suspect a confusion over RGB vs. YCbCr.

This image has tags for both:

>> [...]
>> Photometric Interpretation: RGB color
>> YCbCr Subsampling: 2, 2
>> [...]

My guess is that it should be

"Photometric Interpretation: YCbCr"

And things would work a lot better.

TiffTechNote 2 requires that if the underlying JPEG compression

uses YCbCr, then the TIFF layer must tell the truth and say it is a YCbCr image and not lie (for compatibility) and say it is RGB.

--
ed grissom

ed.grissom@intergraph.com