Alain <aze### [at] qwertyorg> wrote:


> > Any particular reason why you used .x (i.e., .red) rather than .gray?  Just
> > curious.

>
> If all 3 colour chanels are the same, it's faster and gives the same result.
> Using ".x", you only access one value.
> Using ".gray" you need to access all 3 chanels, then you perform a
> ponderated average.
>
Thanks, Alain. I never thought about that, when using a grayscale image to begin
with.

Ken

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