Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!apple!casseres
From: casseres@Apple.COM (David Casseres)
Newsgroups: comp.sys.next
Subject: Re: WYSIWYG & DPI
Keywords: WYSI*A*WYG
Message-ID: <148@internal.Apple.COM>
Date: 25 Oct 88 19:59:20 GMT
References: <6937@orstcs.CS.ORST.EDU> <12908@oberon.USC.EDU> <2482@silver.bacs.indiana.edu> <31144@bbn.COM> <74013@sun.uucp>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 14

In article <74013@sun.uucp> landman@sun.UUCP (Howard A. Landman) writes:

>Here's a hard lower bound.  Studies have shown that 2-bit grayscale
>gives you better "perceived" screen resolution than spending the same
>bits on extra 1-bit resolution.  Since doing that would give you
>SQRT(2) more pixels in each direction, we know that the "effective"
>resolution of the 96-DPI NeXT screen must be AT LEAST 96 * 1.41 = 135 DPI,
>almost twice that of a Macintosh or Alto.

We only know this if we know that the NeXT actually uses the 2-bit gray-
scale display to do grayscale anti-aliasing.  I have the impression that
it does not; does anyone actually know?

David Casseres