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From: pete@octopus.UUCP (Pete Holzmann)
Newsgroups: comp.graphics
Subject: looking for COLOR HALF-TONE SCREEN algorithm(s) and advice
Message-ID: <251@octopus.UUCP>
Date: Sun, 3-May-87 10:55:06 EDT
Article-I.D.: octopus.251
Posted: Sun May  3 10:55:06 1987
Date-Received: Sun, 3-May-87 20:10:02 EDT
Reply-To: pete@octopus.UUCP (Pete Holzmann)
Distribution: world
Organization: Octopus Enterprises, Cupertino, CA
Lines: 21

I'm looking for references (to code and/or algorithms) for producing bit-map
color output using a half-tone screen algorithm. Since printers use half tone
screens to get lots of colors out of 4-color presses, it seems the same
technique would work well when trying to get 4-color (3 + black) computer
printers to do the same thing.

Algorithms for both variable width line and filled-area output would be useful.
I'd like to play with changing the angle of the screens (rotating them
separately in the X-Y and/or Z planes). Presumably, the screen is a true 
filter, so that the final output is clipped at full resolution to the original
dimensions of the object being output.

I can (and probably will end up doing...) spend a lot of time to figure out
how to do all this, but if anybody has already done it, it would sure save a
lot of time! Are there any references to algorithms like this? Can anybody
think of anything else to add to it?
-- 
  OOO   __| ___      Peter Holzmann, Octopus Enterprises
 OOOOOOO___/ _______ USPS: 19611 La Mar Court, Cupertino, CA 95014
  OOOOO \___/        UUCP: {hplabs!hpdsd,pyramid}!octopus!pete
___| \_____          Phone: 408/996-7746