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Date: Tue, 2 Apr 2002 16:30:06 -0500 (EST)
From: Dwight Kelly <dkelly@apago.com>
To: "Woodward, Vernon L" <vernon.l.woodward@lmco.com>
cc: tiff@olympiakos.com
Subject: RE: Monochrome Flag question
In-Reply-To: <F87704CDCF62D311A7C200508B1216320DACAC3C@emss03m02.orl.lmco.com>
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On Tue, 2 Apr 2002, Woodward, Vernon L wrote:

> Is there a tag I can set to distinguish between 3 band (24 bit) monochrome,
> where all three bands have equivalent pixels, and 3 band color (RGB)?

True RGB would use PHOTOMETRIC_RGB. Are you saying you have a file with
PHOTOMETRIC_RGB but it really contains 3 monochrome channels? Or is the
file PHOTOMETRIC_MINISWHITE/PHOTOMETRIC_MINISBLACK with SAMPLESPERPIXEL =
3?

For PHOTOMETRIC_RGB, SAMPLESPERPIXEL=3: I would guess that R, G, B samples
would all be the same value (R=G=B).

-- 
Dwight Kelly
Apago, Inc.  
4080 McGinnis Ferry Rd  Suite 601
Alpharetta, GA 30005
voice:(770) 619-1884  fax:(770) 619-1885
email: dkelly@apago.com web: http://www.apago.com


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