[comp.graphics] RBG -> black & white ?

cosell@cosell.bbn.com (Bernie Cosell) (12/23/87)

Luminance = .3Red + .59Green + .11Blue
  [ref: Foley & Van Dam, exercise 17.7 -- does that equation appear
   anywhere in the main text of the book??]
   __
  /  )                              Bernie Cosell
 /--<  _  __  __   o _              BBN Labs, Cambridge, MA 02238
/___/_(<_/ (_/) )_(_(<_             cosell@bbn.com

jmd@granite.dec.com (John Danskin) (12/29/87)

In article <19483@bbn.COM> cosell@bbn.com.UUCP (Bernie Cosell) writes:
>
>Luminance = .3Red + .59Green + .11Blue
>  [ref: Foley & Van Dam, exercise 17.7 -- does that equation appear
>   anywhere in the main text of the book??]

Page 613, the Y coomponent of the RGB to YIQ matrix.