Increasing the cyans is interesting. On your previous image turning off
everything but the red in ACR made a mess of the sky. But adding back
some "blues" fixed it.
Chuck Norcutt
C.H.Ling wrote:
> 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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