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Article #19489Looking for Dithering Algorithms
From: Chris Christensen
Date: Wed, 23 Sep 1987 20:27
Date: Wed, 23 Sep 1987 20:27
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1349 bytes
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)
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!necntc!ames!sdcsvax!ucbvax!hplabs!hpcea!hpcid!cnc 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