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Matching colors after dodge and burn

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  #1  
Old 02-28-2014, 12:26 PM
c0c c0c is offline
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Matching colors after dodge and burn

Hi all!

Sure you all now that after D&B the dodge parts get over-saturated and burn parts undersaturated, getting as result a mix-colored (or must say mix-satured) skin.

This is very annoying and unaceptable in some works. I have been reading about it and the theory is clear: curves, tone-saturation and gradient maps. What I didn't found so easy was the way to put these theory in practice.

I tried but in some photos the colors didn't match at all, so I'm doing some thing wrong. I'm asking here for some tutorial or workflow that shows how to homogenize an image after dodge and burn. I know there's no rules about it, but still interested in see some of these.

Thank you in advance, and sorry for my english

PS: I do dodge and burn by curves adjustment layer
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Old 02-28-2014, 12:32 PM
rl-retouch rl-retouch is offline
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Re: Matching colors after dodge and burn

If you D&B with curves all you really need to do is to put a hue/sat adj layer above the curve and click the clipping icon, the set the hue and sat to suit.
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Old 02-28-2014, 01:04 PM
c0c c0c is offline
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Re: Matching colors after dodge and burn

Do I really need to adjust hue? Which range of values are aceptable? between 0-10%? i know it depends of the image but when I change the saturation level the image looks pretty ugly...

I'm thinking of matching colors by curves, reaching the cmyk values from a near unretouched skin. Will it works?

Thanks for your advice.
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Old 02-28-2014, 10:01 PM
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Aladdin Aladdin is offline
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Re: Matching colors after dodge and burn

This sounds strange. Usually D&B enhances the image, do you have a before and after example, just in case you are doing something wrong. Which technique are you using for D&B?
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Old 03-01-2014, 01:20 AM
klev klev is offline
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Re: Matching colors after dodge and burn

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Originally Posted by c0c View Post
PS: I do dodge and burn by curves adjustment layer
Not my preferred method, but there are a few things to keep in mind. First off is that you can build some amount of color correction into the curve if you like. If you're making a big change, it's likely that you will have to deal with colors that don't match. A problem there is that darker colors aren't necessarily a darker shade of the lighter ones. There's a lot more to it, but what's important is that you cannot count on one to be a darker version of the other.

There are a few methods I can suggest for dealing with this. Keep the curve layers to a specific region and build color correction into them. You can always use sampling and just move all 3 channels, and it's the easiest way to do that. You can make another layer in mode color then use the clone stamp to go over the really shifted areas. You can clip another adjustment layer for color correction to the curve layer. It can also be masked to a subset of the curve layer if necessary. You can pick a different method, but you are going to encounter this at some point no matter what you do. It's not something that is always avoidable.
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Old 03-01-2014, 11:31 AM
redcrown redcrown is offline
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Re: Matching colors after dodge and burn

This video gives a good tutorial on color shifts in D&B.

https://www.youtube.com/watch?v=h59iLvLMuOQ

The author is a frequent contributor on the ModemMahem forum, where you will find a lot more info on D&B than anywhere else.
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Old 03-02-2014, 03:14 AM
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AKMac AKMac is offline
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Re: Matching colors after dodge and burn

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Originally Posted by redcrown View Post
This video gives a good tutorial on color shifts in D&B.

https://www.youtube.com/watch?v=h59iLvLMuOQ

The author is a frequent contributor on the ModemMahem forum, where you will find a lot more info on D&B than anywhere else.
That's a really informative video.

One other method which can be quick and effective is just to create a new layer in Color Mode and paint with colour sampled from adjacent areas, using a soft brush at around 20-30% opacity, and Fading (Shift/Cmd/F) to fine-tune.

I think it's important to know how far you want to take the correction of natural hue/saturation variations in the skin. It's easy to get too carried away and end up with a face that looks 'perfectly' monochromatic and unnatural.
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Old 03-02-2014, 06:43 AM
skoobey skoobey is offline
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Re: Matching colors after dodge and burn

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Originally Posted by AKMac View Post
That's a really informative video.

One other method which can be quick and effective is just to create a new layer in Color Mode and paint with colour sampled from adjacent areas, using a soft brush at around 20-30% opacity, and Fading (Shift/Cmd/F) to fine-tune.

I think it's important to know how far you want to take the correction of natural hue/saturation variations in the skin. It's easy to get too carried away and end up with a face that looks 'perfectly' monochromatic and unnatural.
It'll look fine as long as you:

keep in mind that shadows, midtones and highlights each have slightly or not to slightly different hues

that areas of bright color such as shirts, leaves, walls etc spill color onto the model, and removing them will look odd

if the color loos odd, first check your shadding/luminosity. Often we perceive something as variation in color, but in fact it's variation in tone.
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Old 03-02-2014, 08:29 AM
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AKMac AKMac is offline
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Re: Matching colors after dodge and burn

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Originally Posted by skoobey View Post
It'll look fine as long as you:

keep in mind that shadows, midtones and highlights each have slightly or not to slightly different hues

that areas of bright color such as shirts, leaves, walls etc spill color onto the model, and removing them will look odd

if the color loos odd, first check your shadding/luminosity. Often we perceive something as variation in color, but in fact it's variation in tone.
Yes - it's crucial to understand how Hue, Saturation and Tone work together, and that Colour Mode is really a Hue+Saturation Mode. It can be very confusing, but you get better with practice.
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Old 03-02-2014, 08:35 AM
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JDClosser JDClosser is offline
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Re: Matching colors after dodge and burn

There are many ways to fix this it just depends on the workflow you are using.
If you are using curves you can control the saturation within the curve. Just drag your white point down so you have a straight line this will desat your curve. The technique I use is a grey soft light layer so I usually address color shifts with painting on another blank layer set to color (as stated above), or painting on the grey layer with an opposite hue....takes some color theory and practice to nail that technique, or if your file structure permits for serious issues you can take the problem area onto another area with the original image....blur it until there is only color data and set to color while adjusting the opacity for the desired result.....same way you would correct color moire issues. There are too many techniques to list but these are what I find the fastest and easiest in my daily workflow.
Cheers,
JD
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