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April 2002
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2002.04.02 21:30 "Re: Monochrome Flag question", by Dwight Kelly
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