Newsgroups: comp.sys.sgi
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!think.com!mintaka!electron!andru
From: andru@electron.lcs.mit.edu (Andrew Myers)
Subject: Re: Who needs 24 bit colors
Message-ID: <1991Apr8.194928.16972@mintaka.lcs.mit.edu>
Keywords: color
Sender: news@mintaka.lcs.mit.edu
Organization: MIT Laboratory for Computer Science
References: <95622@sgi.sgi.com> <1991Apr5.184742.1029@nas.nasa.gov> <95727@sgi.sgi.com>
Distribution: usa
Date: Mon, 8 Apr 91 19:49:28 GMT
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In article <95727@sgi.sgi.com> tarolli@westcoast.esd.sgi.com (Gary Tarolli) writes:
>agreed, but I still think you can make a pretty good argument for dithering.
>Lets face it, 30 bit RGB with 10 bit DACs etc is not free (today).  Dithering
>is just about free if done in hardware. and when done using 8 bits each of
>red,green,blue, I don't think you really lose much spatial resolution.
>Theoretically you do, but since the colors you are modulating between
>are so close together, I don't think edges will look any less sharp or 
>images any more grainy.

On the newer monitors, it becomes more obvious that dithering is losing you
spatial resolution. The older monitors from SGI blur adjacent pixels enough
that you have already lost that resolution; hence, dithering seems like a
total win.

Andrew