How to adjust the contrast of a mask

[davidf36046963]

Hey everyone,

I need to change the contrast of a mask, Such that dark gray pixels turn more towards black and light grey ones turn more towards white. When I select the mask and try to apply a contrast correction, it creates a new layer instead of changing the apperence of the mask. How could this be done? Thanks a lot

[davescm · Accepted solution]

Hi

Select the layer with the mask you want to adjust

Go to the Channels panel and turn on the mask view icon .

Then hit the ~ key to turn off the RGB channels

You will see the mask as greyscale on screen

Now Image Adjustments -Curves and increase the contrast by adjusting the curve

When you are done, double click on the RGB channel in the channels panel to restore the normal view

Dave

[Eternal Warrior]

+1

[davescm]

Whilst I gave you the method to adjust the overall contrast in post 1 above, there is another method if you just want to increase contrast in parts of a mask - leaving other parts untouched.

Set at brush to 50% opacity and the brush blending mode to overlay. Click on the mask and brush with black where you want to darken the darker greys and with white where you want to lighten the lighter greys. This is very effective at sharpening up a mask edge.

Hope that helps you further

Dave

[c.pfaffenbichler]

Could you please post a screenshot with the pertinent Panels (Layers, Channels, Options Bar, …) visible?