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From: Willem <willem@turtle.stack.nl>
Newsgroups: comp.compression
Subject: Re: Trinary image compression
Date: Mon, 22 Oct 2012 20:53:14 +0000 (UTC)
Organization: Stack Usenet News Service
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glen herrmannsfeldt wrote:
) I very much like the idea of JBIG and the compression of binary
) (black, white, but no gray or other colors) images.
)
) There are, however, some books, at least computer manuals,
) written with two ink colors. (Black and blue for example.)
)
) There is, as far as I know, no JTIG compression for trinary
) (black, blue, white) images. (Presumably one could allow for
) any three colors, likely one being white.)
)
) More specifcally, there are many DEC manuals in bitsavers
) that have lost some bits in scanning. If there was a format
) to store them in, there might be more interest in doing it.

I think it would be easiest if you split the image in two,
one containing the black text and one containing the blue text.


SaSW, Willem
-- 
Disclaimer: I am in no way responsible for any of the statements
            made in the above text. For all I know I might be
            drugged or something..
            No I'm not paranoid. You all think I'm paranoid, don't you !
#EOT