J O H N  A L L A N wrote:
What is the best practice for eliminating (or severely reducing tanlines)?

This is an image that was done specifically to soften and minimize tan lines.
It had the kind of hard lines that yours does, I used a curves and channel
mixer adjustment layer, channel mixer set to luminosity to slightly lighten
tan skin and a curves layer that I took an eye dropper reading so I could
match the curves output to.

+18
https://photos.modelmayhem.com/photos/1 … 1cfad3.jpg

Tulack wrote:
It's luminosity problem. Takes one minute in PS.

Just change

147,114,100 to 198,175,169

Well, if I take that simplistic of an approach, I throw off the whole tonal balance of her chest.

Jas K retouch wrote:
http://www.youtube.com/watch?v=c5gZQ3QE5ys

Thanks for the link and surprise, the video's by my next door studio neighbor.

J O H N  A L L A N wrote:

Thanks for the link and surprise, the video's by my next door studio neighbor.

Wow, small world!

In that case:
1. Get a six pack of beer or a bottle of wine.
2. Go next door.
3...

Jakov Markovic wrote:
Select the white point eyedropper tool,

It can be any point, white, black or midgrey. Or even any color on the curve. Besides, if you going to do it the way you describe, you will need to watch luminosity value and if luminosity of reference and target different you would bring color shift.

Jakov Markovic wrote:
Confirm that you want to change the default white point.

Why would you do it default? You should not confirm. Say "no" and it would be only for this time.

Jakov Markovic wrote:
Mask as needed.

He doesn't know how to use mask.

J O H N  A L L A N wrote:
Please don't post altered images of mine on the forums. Please remove the pictures from the posts immediately.
Although I appreciate your effort - your gimp specific recommendations don't help because I (like most), use Photoshop.

A moderator must have beat me to it. I can't even edit the old post anymore.

Here's a demonstration of one way to get rid of sharp tanlines using an image I found by searching for "tan lines" on Wikipedia's media hosting site:

1. Run the GIMP Wavelet Decompose filter (leave it on the default setting of 5 layers of separation).

2. On the Wavelet Residual layer, which is essentially all color and no texture information, even out the color in and around the tan lines.

3. Optionally, you can do some dodging and burning.







The result:

Photographer: Gerd
License:  Creative Commons Attribution 3.0 Unported

Tulack wrote:

Jakov Markovic wrote:
Select the white point eyedropper tool,

It can be any point, white, black or midgrey. Or even any color on the curve. Besides, if you going to do it the way you describe, you will need to watch luminosity value and if luminosity of reference and target different you would bring color shift.

Jakov Markovic wrote:
Confirm that you want to change the default white point.

Why would you do it default? You should not confirm. Say "no" and it would be only for this time.

He doesn't know how to use mask.

Of course I know how to use masks - what a ridiculous assertion.

Ole-Henrik Helin wrote:
Though, it takes (too) much time.

It doesn't take more than a minute.

Joann Empson wrote:

A moderator must have beat me to it. I can't even edit the old post anymore.

Here's a demonstration of one way to get rid of sharp tanlines using an image I found by searching for "tan lines" on Wikipedia's media hosting site:

1. Run the GIMP Wavelet Decompose filter (leave it on the default setting of 5 layers of separation).

The OP has already stated that GIMP specific solutions will not help him, as he is using Photoshop.

I hope GIMP is somehow compensating you for being such a loud cheerleader.

Good Egg Productions wrote:
I hope GIMP is somehow compensating you for being such a loud cheerleader.

I don't use the GIMP either. I hope Photoshop catches up in that area soon...
https://www.modelmayhem.com/po.php?thread_id=898588

Tulack wrote:

Jakov Markovic wrote:
Select the white point eyedropper tool,

It can be any point, white, black or midgrey. Or even any color on the curve. Besides, if you going to do it the way you describe, you will need to watch luminosity value and if luminosity of reference and target different you would bring color shift.

Jakov Markovic wrote:
Confirm that you want to change the default white point.

Why would you do it default? You should not confirm. Say "no" and it would be only for this time.

He doesn't know how to use mask.

No, it can only be the white point, as we're trying to change the exposition, and not change light dynamic within the area.

Yes, you do have to change the default, because that automates the process when you select the white point(if you don't set default, picking the white point lightens the area even more, setting the white point to 255 255 255, and you DON'T WANT THAT, you want to darken it). Setting the default just changes the default in adjustment layer, it doesn't affect the image itself.

You do need to MASK this, but it IS THE EASIEST WAY TO FIX TAN LINES.

Jakov Markovic wrote:
No, it can only be the white point, as we're trying to change the exposition, and not change light dynamic within the area.

Masochism does appreciated in certain circles, but you are wrong here. What happened when you take white point. You take 255 255 255 and tell it, to whatever I click should be 198,175,169. What happened when you take black point? You take 0 0 0 and tell it, to whatever I click would be 198,175,169, Same with gray. It doesn't matter what point you take, as long you tell it what it is going to be after you click ok.

Jakov Markovic wrote:
Yes, you do have to change the default,

No, you don't. You don't click on anything. You just plug in your numbers to any point (white, black or gray). If you set it by default, you would need to change it back later, some idiots even asking, what is wrong with there white point. Dude, you set it by default. Open any point, plug in your numbers. Click "no" and after you apply it, it resets to default.
Non of the point lighten or darken anything. They are just points. You can set white point to 0 0 0 and black to 255 255 255 and use them backwards. They don't have value by itself. Only numbers behind them.

Jakov Markovic wrote:
Oh, why isn't there a central data base for this kind of thing??? I keep writing same things over and over again.

Oh, well...

So you go about this by changing the white point:

New curves adjustment layer.
Select the layer, not the mask.
Select the white point eyedropper tool, double click to go into choosing a default white point, and pick a color in the image that is the tanned part.
Confirm that you want to change the default white point.
Now click white point eyedropper tool once to choose it, and select the light portion of the skin.
Mask as needed.

Tried it. One thing I found though is to use opacity, not flow for drawing in the mask (I use flow exclusively for my d&b masks). Using flow just results in these horrible scribbles of brown. I think I need to do more d&b to smooth out the skin (to get it down to primarily two luminosities), before applying this technique, as I sill have some blotchiness. But I think this technique works somewhat. It maybe needs to be combined with something that blurs the edge transition between tanned and untanned skin however.

J O H N  A L L A N wrote:
It maybe needs to be combined with something that blurs the edge transition between tanned and untanned skin however.

You can use mask.

J O H N  A L L A N wrote:

Tried it. One thing I found though is to use opacity, not flow for drawing in the mask (I use flow exclusively for my d&b masks). Using flow just results in these horrible scribbles of brown. I think I need to do more d&b to smooth out the skin (to get it down to primarily two luminosities), before applying this technique, as I sill have some blotchiness. But I think this technique works somewhat. It maybe needs to be combined with something that blurs the edge transition between tanned and untanned skin however.

OMG, that thing you call "smoothing the edge" is MASKING. That's what it's about.

You can just use the Lasso tool with a feather radius.

Good Egg Productions wrote:
The OP has already stated that GIMP specific solutions will not help him, as he is using Photoshop.

The reason I posted is because I'm afraid visitors reading the threads on the site for their own education will get the mistaken impression that Adobe's Photoshop is the only way to do things.

Good Egg Productions wrote:
I hope GIMP is somehow compensating you for being such a loud cheerleader.

GIMP benefits me by providing me with the tools necessary for raster image editing, while respecting my four essential software freedoms. If I did this work with a proprietary program like Adobe's Photoshop, I would have to give up my freedoms. I give back to the GIMP project through donations to the GNOME Foundation, which handles the finances for the project.

Tulack wrote:

Masochism does appreciated in certain circles, but you are wrong here. What happened when you take white point. You take 255 255 255 and tell it, to whatever I click should be 198,175,169. What happened when you take black point? You take 0 0 0 and tell it, to whatever I click would be 198,175,169, Same with gray. It doesn't matter what point you take, as long you tell it what it is going to be after you click ok.


No, you don't. You don't click on anything. You just plug in your numbers to any point (white, black or gray). If you set it by default, you would need to change it back later, some idiots even asking, what is wrong with there white point. Dude, you set it by default. Open any point, plug in your numbers. Click "no" and after you apply it, it resets to default.
Non of the point lighten or darken anything. They are just points. You can set white point to 0 0 0 and black to 255 255 255 and use them backwards. They don't have value by itself. Only numbers behind them.

THERE IS REASON YOU USE A WHITE POINT! You compress the image from the whites, you don't affect the white balance (which is what gray point does), and WHY would you use the black point, when it compresses the blacks??? Maybe if you were trying to lighten something you would do that, but NOT to darken A LIGHT area.

Basically, we're saying to the program that the tanned area is the whitest that can be, and that it's color is true white, then we pick the lighter skin patch and make the lightest point in the sampled area as dark as the tanned skin.

Anyone can do this manually and then just mask it, but WHY ON EARTH would you try to dial in the numbers that are already there. Just use them.

I am really trying to understand your point, but when I do things you say it gives a completely different result to the one desired. I don't want to be ignorant, but I just can't see the point in you trying to explain that this doesn't work, when it obviously does??? And it is such a basic approach, I mean anyone who knows how to mask and use adjustment layers can implement this technique.