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Quasihedron

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I have not been able to find any making features where I can expand or contract the mask by a few pixels. Mask Feather just makes the edge more transparent. Adjusting the Tolerance and/or Level do not solve my problem, since it often makes large jumps in the masking even when the adjustment is only 0.1%.  

How does one expand or contract a mask by a few pixels without adjusting the general shape of the mask? 

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Quasihedron

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rldavis

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Reply with quote  #2 
If you are creating your mask from the alpha channel I have something that might work for you. It takes a few steps but I have used it successfully.

bd

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Quasihedron

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Please let me know. I have used combinations of all sorts but have not yet found a consistent and predictable secret to following the path around the perimeter of a selection at the distance of a few, to a few dozen, pixels.

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Quasihedron
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kcarlino

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Reply with quote  #4 
Hi Quasihedron,

You will want to use the Mask Edit Layer mode and use a Process filter (Maximum) to reduce a mask. Here is a quick animated GIF showing this approach.

[a4f8b3479c2d5f5d8bf95798809e7608]  Ken
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kcarlino

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Reply with quote  #5 
Oh and the minimum filter will expand a mask when in Mask Edit Layer mode.
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Quasihedron

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Thanks for the tip! It is appreciated greatly! 
Quasihedron

 

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rldavis

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Reply with quote  #7 
Wow, Ken's process is great. I was using multiple layers and filters. This is how I'll be doing it. Thank you Ken.

bd

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kcarlino

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Reply with quote  #8 
Glad this tip was useful!
Ken
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