Xref: utzoo comp.sys.mac:51061 comp.sys.mac.hardware:2408
Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!tut.cis.ohio-state.edu!cs.utexas.edu!asuvax!ncar!boulder!fozzard
From: fozzard@boulder.Colorado.EDU (Richard Fozzard)
Newsgroups: comp.sys.mac,comp.sys.mac.hardware
Subject: Re: Color video cards info
Message-ID: <18673@boulder.Colorado.EDU>
Date: 21 Mar 90 16:55:10 GMT
References: <432@gestetner.oz> <1990Mar9.004044.16761@eddie.mit.edu> <5929@crdgw1.crd.ge.com> <27835@cup.portal.com> <7289@goofy.Apple.COM>
Sender: news@boulder.Colorado.EDU
Reply-To: fozzard@boulder.Colorado.EDU (Richard Fozzard)
Distribution: usa
Organization: University of Colorado, Boulder
Lines: 20

In article <7289@goofy.Apple.COM> sands@apple.com (Michael Sands) writes:
>The other question is how much resolution do you need to stimulate the 
>typical human eye.  A short poll here suggested anywhere between eight and 
>ten bits.  There are ten bit DAC's available.
>

I used to work for an image processing company where we did some studies
indicating that people could not see more than 64-128 levels [6-7bits].
256 levels should be more than adequate for any grey scale images. The
advantages of going to 10 or 12 bit images is the additional processing
[ie. edge enhancement, etc] that can be done w/o loss of information.
There is no reason to spend the money on 10 bit DACs to your monitor, but
there is often justification to use 10 or 12 bit ADCs on input.

rich

========================================================================
Richard Fozzard					"Serendipity empowers"
Univ of Colorado/CIRES/NOAA	R/E/FS  325 Broadway, Boulder, CO 80303
fozzard@boulder.colorado.edu                   (303)497-6011 or 444-3168