Use Black & White in Local adjustments?

Frank Giesecke

• May 13, 2017 11:28

Is there a way to use Black & White in local adjustments?
I think it's a tool "only" for global settings, isn't it?

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  Ian Wilson

  Moderator

  • May 13, 2017 13:11

  

  You can reduce the saturation to zero as a local adjustment and you can also do some other things that you might do in a black and white conversion, such as apply a curve or adjust the contrast. But beware - I have discovered that if you have the saturation at more than the zero mid point on the image as a whole, the black and white bit ends up not quite monochrome (because the local adjustment saturation is relative to the image as a whole, not an absolute amount). The answer is therefore to create another local adjustment layer that is the inverse of the black-and-white one, and only increase the saturation on that, not on the whole image.
  
  Ian

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  Frank Giesecke

  • May 13, 2017 14:28

  Thanks, Ian.

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