Mask Reversal

davidvj · Post by **davidvj** » Fri Mar 23, 2007 10:09 pm

I am having a problem finding out how to simply reverse a mask.

Typically I may wish to process the sky area apart from the land mass and I was assuming that there must be a way to simply reverse the selected portion of the image.

All that I can see is that the mask can be applied and the proces restarted.

Eval version 10

Bobm03 · Post by **Bobm03** » Sat Mar 24, 2007 1:43 am

In the "Selection" dropdown, select "Invert."

davidvj · Post by **davidvj** » Sat Mar 24, 2007 2:02 am

OK .. sounds easy ... but

I make a mask, then process the masked area .. at which point the REVERSE is grayed out!

How do I use the same mask fo the other half of the image?

Post by **Ron P.** » Sat Mar 24, 2007 2:24 am

PI does this a bit differently then some other apps.

Enter Mask Mode (Edit || Mask Mode, or CTL+K, or pressing on the Mask icon in the Layers Palette).
Create your mask, ie; using the paint brush painting the area to mask
Now exit Mask Mode and you should have a Selection.
Store your selection. (Selection || Store Selection
Selection || Invert
Enter Mask Mode, you should notice that the Masked (red or whatever color you are using to depict your mask) is now inverted..

Hope that's what you are chasing....