Article View: comp.sys.amiga.tech
Article #8316Re: 32 shades of gray
From: Randell E. Jesup
Date: Wed, 09 Mar 1988 07:22
Date: Wed, 09 Mar 1988 07:22
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1591 bytes
In article <2801@gryphon.CTS.COM> richard@gryphon.CTS.COM (Richard Sexton) writes:
>I've been using this tip to acheive what looks for all the world
>like 32 gray scales.
...
>Now, to get the additional 16 shades of gray, dither 1:1 between
>every n'th color and it's n+1'th counterpart. Use the following pattern:
Not only does it work for pure grays, but if you take a set of grays,
say 5, and 1 or two different shades of another color, and then use the
50% dither, you produce what appears to be several new shades of that other
color (MD Blue + DK gray = DK Blue, for example. The gray and the color you
dither with can't be TOO far apart in luminance, or it's noticable, but in
general it is useful.
// Randell Jesup Lunge Software Development
// Dedicated Amiga Programmer 13 Frear Ave, Troy, NY 12180
\\// beowulf!lunge!jesup@steinmetz.UUCP (518) 272-2942
\/ (uunet!steinmetz!beowulf!lunge!jesup) BIX: rjesup
(-: The Few, The Proud, The Architects of the RPM40 40MIPS CMOS Micro :-)
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arc1-ca.pugleaf.net!utzoo!utgpu!water!watmath!clyde!bellcore!decvax!ucbvax!agate!ig!uwmcsd1!leah!itsgw!imagine!pawl21.pawl.rpi.edu!jesupReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watmath!clyde!bellcore!decvax!ucbvax!agate!ig!uwmcsd1!leah!itsgw!imagine!pawl21.pawl.rpi.edu!jesup From: jesup@pawl21.pawl.rpi.edu (Randell E. Jesup) Newsgroups: comp.sys.amiga.tech Subject: Re: 32 shades of gray Keywords: gray scale Message-ID: <498@imagine.PAWL.RPI.EDU> Date: 9 Mar 88 07:22:12 GMT References: <2801@gryphon.CTS.COM> Sender: news@imagine.PAWL.RPI.EDU Reply-To: beowulf!lunge!jesup@steinmetz.UUCP (Randell Jesup) Organization: RPI Public Access Workstation Lab - Troy, NY Lines: 20