Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!usc!julius.cs.uiuc.edu!apple!radius!pierce
From: pierce@radius.com (Pierce T. Wetter III)
Newsgroups: comp.graphics
Subject: Re: RGB to gray
Message-ID: <1375@radius.com>
Date: 22 Nov 90 01:30:22 GMT
References: <1990Nov19.050822.12771@metro.ucc.su.OZ.AU> <1990Nov20.105041.19140@galadriel.bt.co.uk>
Lines: 12

>Use:  Y = .299 R + .587 G + .114 B

  That will work for the NTSC phosphor set. If you want to be completely 
anal about it you need to recalculate the formula for each phosphor set.

  Or at least use the formulas for the SMPTE phosphor set.

Pierce
-- 
My postings are my opinions, and my opinions are my own not that of my employer.
You can get me at radius!pierce@apple.com.
(Wha'ja want? Some cute signature file? Hah! I have real work to do.