I have slighly reduced the value of red and yellow to make them 100% and
below but the problem still exist. Tried playing with other values found
Cyans is the key, increase the Cyans helps a lot but this do not solve the
problem if the default CS4 red filter setting is simulating the effect of
red filter then changing anything will shift the effect.
C.H.Ling
----- Original Message -----
From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
> The first thing that gets my attention in the red filter is that there
> are values of more than 100% while the B/W filter's values are all less
> than 100%. In particular, in the red filter the red and magenta are at
> 120% and the yellow at 110%. Does this mean that any red pixel is
> multiplied by 1.2? I don't know exactly what it means but if it does
> mean multiply pixel values by 1.2 then any pixel of 213 or higher will
> create a blown pixel.
>
> I note that the B/W filter with values all less than 100% produced a
> good looking image without noise or pixelation. Perhaps if the red
> filter's values were divided by 1.2 you'd get proportional numbers
> without causing blown highlights.
>
> That would give values of:
>
> > Reds 100%
> > Yellows 92%
> > Greens -8%
> > Cyans -42%
> > Blues 0%
> > Magentas 100%
>
> Chuck Norcutt
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