Path: utzoo!utgpu!water!watmath!clyde!rutgers!psuvax1!vu-vlsi!cbmvax!daveb
From: daveb@cbmvax.UUCP (Dave Berezowski)
Newsgroups: comp.graphics
Subject: Re: Converting RGB <-> HSV
Message-ID: <3170@cbmvax.UUCP>
Date: 20 Jan 88 16:45:56 GMT
References: <6781@bbn.COM> <7018@pur-ee.UUCP>
Reply-To: daveb@cbmvax.UUCP (Dave Berezowski)
Organization: Commodore Technology, West Chester, PA
Lines: 21

In article <7018@pur-ee.UUCP> 3ksnn64@pur-ee.UUCP (Joe Cychosz) writes:
>In article <6781@bbn.COM> cosell@bbn.com.UUCP (Bernie Cosell) writes:
>>
>>Does anyone have the formulae for converting Red/Green/Blue color
>>specs to and from Hue/Saturation/Value specs?  Also, does anyone
>>have the equation for converting color->grayscale?  Thanks
>
>
>RGB to grayscale:
>
>	Y = .59*R + .11*G + .33*B
>
>RGB to/from HSV:
>
>	This is discussed in Foley and Van Dam book "Fundementals of
>	Interactive Computer Graphics."


	A more accurate formula is:

	White = .299*R + .587*G + .114*B