Re: [Groff] cmyk -> gray conversion

[Larry Jones]

Werner LEMBERG writes:
> 
> Does somebody know a conversion algorithm CMYK -> gray?  For RGB, I
> use
> 
>   0.299r + 0.587g + 0.114b

Plugging the CMYK -> RGB algorithm into that gives:

        (1 - 0.299c - 0.587m - 0.114y)(1 - k)

-Larry Jones

All this was funny until she did the same thing to me. -- Calvin