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Date: Tue, 7 Dec 99 10:15 PST
From: mccoy@pixar.com (Daniel McCoy)
To: TIFF Mailing List <tiff@olympiakos.com>,
        Kambiz Asrar Haghighi <kambiz@interchange.ubc.ca>
Subject: Re:  run-length encoding
Sender: owner-tiff@olympiakos.com

>As far as I can tell, tiff only recognizes run-length coding for bi-level
>images, are there any provisions for tiff readers to recognize
>(.pcx) style color run-length coding? Or is it hopeless to run-length
>encode an RGB image using the PCX microsoft format and expect any tiff
>programs to read that(I guess I should know better than to ask this
>question, I haven't seen such a tag in the compression field).

TIFF includes Mac style "PackBits" run-length encoding, which works
for strings of bytes.   It works fine 8-bit grey scale or palette 
images or 24-bit RGB images that are stored in "separate" format.
