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From: "Grissom, Ed" <ed.grissom@intergraph.com>
To: tiff@remotesensing.org
Subject: RE: [Tiff] Color TIFF/JPEG compression questions
Date: Mon, 2 May 2005 08:44:37 -0500 
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Status:   


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 
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