Curvemeister > Color pinning

Pinning problem

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themightyzog:
Hi Greg,

I'm having trouble understanding what is wrong with this image when I try pinning it in rgb (it is okay in lab).

After setting the shadow and highlight point (towards the bottom of the blouse), what ever (issued) skin pin I then choose, things get worse - why would that be?

Thanks
Chris

Greg Groess:
Zog,

When I set a neutral on the blouse in RGB (see screen shot) the skin tones fall into the "reasonable" zone....
Was there more that you are trying to do to this image??  Am I missing something??

Greg

themightyzog:
Ah Greg, I'm not explaining myself very well.

This is a reject image I was playing with as I'm organising a Photo Exhibition and one of the things I will attempt to do is to show off CM and generally try and get people in to post-processing.

Anyway I was looking for examples where there can be a real difference by just setting shadow and highlights.

The image below shows those 2 points, but I reckoned because of the various reflections/shadows on the blouse, that it was not worth setting a neutral.  I just thought I'd trying showing how effective skin pinning is, as the image becomes a bit too warm.

So set the points as I have and then see what the skin pins do - and the question is why does it muck everything up!?

Greg Groess:
Check two things....

Set the Pin Mode to Hue/Sat.  Turn off the brightness.

1 )Try setting the Skin pin first in RGB color is linked to brightness If you set the skin pin last it might drag a specific channel or channels..."red" down to the brightness setting on the pin. 

2) Shop the Pin around a bit and see if there is a better placement for it. 

BTW the blouse has a brighter highlight where I set mine.  I kept your shadow area though...
Greg

themightyzog:
Okay, thanks Greg, I had a bash at that and ...
Yes I knew there was a lighter point on the blouse, but I reckoned there was no detail to be had in that spot, so I could blow it! 
But that is the answer (although I do not understand why) - If I use your highlight point all is okay - so trying to squeeze more light into the image makes the pin fail.

This simple snapshot is actually extremely hard - the walls are magnolia yellow, not greenish and the blouse is all white.  I think it is impossible to get right with simple curves.

I also would never had thought to go just next to the eye - I tried a dark cheek.  Still got a lot to learn.

Thanks
Chris

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