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From: meuchen@grad1.cis.upenn.edu (Paul Eric Menchen)
Newsgroups: comp.graphics,comp.fonts
Subject: Re: Converting spatial resolution to intensity resolution
Summary: Yes a program exists on the Mac
Keywords: TIFF GIF
Message-ID: <16065@netnews.upenn.edu>
Date: 28 Oct 89 03:10:32 GMT
References: <4155@cbnewsc.ATT.COM>
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Reply-To: meuchen@grad1.cis.upenn.edu.UUCP (Paul Eric Menchen)
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In article <4155@cbnewsc.ATT.COM> vgopal@cbnewsc.ATT.COM writes:
>Has anyone written a program that takes a high resolution monochrome
>image (only two levels of intensity - black and white) and converted
>it to low resolution image but with greyscale information ?  Thus
>trading off spatial resolution for intensity resolution..
>
>
On the Mac a program called Vision Lab does this kind of thing.  It is
available at sumex-aim.stanford.edu in /info-mac/demo.  It converts
from all sorts of file formats to all other sorts of file formats.
Specifically, in regard to your question, it can take MacPaint files
which are only black and white and "undigitize" them its words.  This
produces a grey-scale image reduced 33 or 50% (you determine) in size.
You can then save this in whatever form you like.  The image could be
scaled to produce a low-res of the original.  I've been very impressed
with the program and only wish the author included his address so I
could get a full featured version.

    /--------------      
   /         /|  /|  Paul Eric Menchen         
  /------   / | / |  meuchen@grad1.cis.upenn.edu
 /         /  |/  |  meuchen@eniac.seas.upenn.edu
/__________________