Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!usc!snorkelwacker!mit-eddie!uw-beaver!fluke!ssc-vax!coy
From: coy@ssc-vax.UUCP (Stephen B Coy)
Newsgroups: comp.sys.ibm.pc.programmer
Subject: Re: 256 GrayScale Matching to 256 Colors
Keywords: Look Up Table Needed
Message-ID: <3229@ssc-vax.UUCP>
Date: 5 Mar 90 18:21:18 GMT
References: <858@dukempd.phy.duke.edu> <1990Mar2.043848.501@uncecs.edu>
Organization: Boeing Aerospace & Electronics, Seattle WA
Lines: 18

In article <1990Mar2.043848.501@uncecs.edu>, cjl@uncecs.edu (Charles J. Lord) writes:
> What I've done on my machine is to load the 256 color registers
> with each of 0..63 repeated four times to make a semi-smooth
> 8-bit output.  It works pretty well for dumping 8-bit B&W images
> to the monitor.  If anyone needs code, let me know.

Another advantage to this method is that even though the video
output is only 6-bits, the data stored in video memory is still
8-bits.  This means that any manipulation/analysis of the data can
be done without losing precision.

>  *  Charles Lord               ..!decvax!mcnc!ecsvax!cjl  Usenet (old) *
>  *  Cary, NC                   cjl@ecsvax.UUCP            Usenet (new) *
>  *  #include <std.disclamers>  cjl@ecsvax.BITNET          Bitnet       *
>  *  #include <cutsey.quote>    cjl@ecsvax.uncecs.edu      Internet     *

Stephen Coy
uw-beaver!ssc-vax!coy