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blotchy skin

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  #1  
Old 05-11-2006, 04:25 PM
seanarmenta seanarmenta is offline
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blotchy skin

i tried searching, but didn't find the solution i needed.

anyway, what's a good way to fix red blotches on fair skin from being cold?

here's an example:

http://seanarmenta.com/samples/blotchy.jpg

i have tried surface blur, smart blur...but smoothed it too much

i tried channel mixer; adding red to green, blue to blue, but the colors were way off afterwards, even after hue/sat adjustment and curves.
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  #2  
Old 05-11-2006, 04:59 PM
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Swampy Swampy is offline
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The most evidence of the problem are in the blue and green channel. Did you try doing a slight surface blue on just those two chanels?
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  #3  
Old 05-11-2006, 05:33 PM
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Daviskw Daviskw is offline
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Hi There

I used the channel mixer. Increased the red in the green channel, then took the yellow out with the blue. Adjusted the color some with a Hue/saturation and levels layer.

Butch
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  #4  
Old 05-11-2006, 06:10 PM
seanarmenta seanarmenta is offline
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aaargh,

butch, i did the same thing! but the colors went all wack on me. good job!

i added a chan mix adjustment layer and set it to lighten. should i just leave it to normal? i'll try it.

i will also try to blur the B/G channels.

okay... tried it. someone walk me through this cause i don't think i'm doing it right?

add chan mix as adjustment layer > click ok
set to lighten
re-open chan mix window
select green chan from pull down menu > set green slider to 0, add red +100(colors go wonky, but texture is gone)
select blue chan, add blue +116 (colors go wonky, but desired smoothness is achieved)

from there, i played around with the blending modes, and found that luminosity got my color somewhat to the original...maybe i can tweak that with a hue/sat layer?

in the right direction? or should i make a u-turn?

Last edited by seanarmenta; 05-11-2006 at 06:24 PM.
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  #5  
Old 05-11-2006, 06:47 PM
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Daviskw Daviskw is offline
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Hi again

I set the mode to lighten. I think where we are doing things a little different is in the green channel I reduced the green to 0 before I boosted the red. Then I used the blue channel when I got too much yellow. I used the mask to keep the lips red.

With the Hue/saturation I used the hue to bring back a little red.

Butch
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  #6  
Old 05-11-2006, 07:47 PM
seanarmenta seanarmenta is offline
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butch -- i could not, for the life of me adjust the color back to anywhere near normal when it was set to lighten LOL! even with a hue/sat adjustment or levels or curves.

but again, when i set the chan mix layer to luminosity, it worked without having to adjust the color back.

thanks again for the help! i'm glad it got me to discover this technique


sean
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  #7  
Old 05-12-2006, 03:03 AM
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bart_hickman bart_hickman is offline
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Classic case for the ol' band-reject filter--here's byRo's tutorial:

http://retouchpro.com/tutorials/?m=show&id=213

Bart
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File Type: jpg de-blotch_arm_skin.jpg (82.6 KB, 77 views)
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  #8  
Old 05-12-2006, 09:31 AM
Ken Fournelle Ken Fournelle is offline
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Bart,

What were your Gaussian Blur settings?

k
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  #9  
Old 05-12-2006, 09:48 AM
Syd Syd is offline
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I adjusted the reds by using selective color and then I used a color balance adjustment layer. For further smoothing I used byRo's Quick De-Grunge Trick and then sharpened it a little.

Sincerely Syd
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File Type: jpg blotchy.jpg (96.6 KB, 49 views)
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  #10  
Old 05-12-2006, 10:38 AM
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Daviskw Daviskw is offline
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Thanks for pointing to the tutorial Bart. Worked great when I started using high enough values. In almost all other blur techniques I would use blur until I could just make out the grunge. I think in this one you need to keep going until the grunge disappears. Took me awhile to get out of the old habit.

I ended up using a value around 20 for the initial highpass setting. Then it worked just fine.

Butch
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