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From: cnc@hpcid.HP.COM (Chris Christensen)
Newsgroups: comp.sys.mac
Subject: Looking for Dithering Algorithms
Message-ID: <3320020@hpcid.HP.COM>
Date: Wed, 23-Sep-87 16:27:56 EDT
Article-I.D.: hpcid.3320020
Posted: Wed Sep 23 16:27:56 1987
Date-Received: Sat, 26-Sep-87 19:31:29 EDT
Lines: 25


I am looking for information about dithering algorithms.

I often see images on the Mac that were dithered with an algorithm with
which I am unfamiliar.

I am familiar with contrained average (checkerboard like patterns) and 
pseudo-optical screening (various size dots), but the algorithm I speak
of looks like it uses a pseudo random screen. It is grainy in apperence
but has fewer "dithering artifacts" than either of the above algorithms.

For anyone with Hypercard, the picture of the baby in the photo album stack
uses the algorithm to which I refer.


So... anyone know what I am talking about?


--------------------------------------------------------------------------------
Chris Christensen					Hewlett-Packard
(408) 553-2955 or telnet 553-2955	Design Technology Center
cnc@hpcid.hp.com					Santa Clara, CA
hplabs!hpda!cnc

(disclaimer: my opinions are not even my own)