Computers and Software > Raster and Vector Manipulation Programs, and How to Do Stuff in Them.

Choking underbase in photoshop

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3Deep:
If base channel is already made, load it as selection (ctrl+click channel)
select->modify->contract by whatever you want. Select->save as new selection.

I pretty much did it this way, just wanted to make sure I was correct, thanks guys

darryl

Sbrem:
all I'll add is one more click; I assumed the image is black and the background white in that channel, so after contracting, I invert my selection, so that now the background is active, and fill it with white. You'll notice it trims the black image. An important step to leave out, sorry...

Steve

ebscreen:
Attached is a PS script I wrote that will automatically create a choked base from all channels.

If the channel is named "White" is will add to base but not choke.

If the channel is named "Blk" (stupid PS/Illy color name conflict issue) it will not add it to the base.

ZooCity:

--- Quote from: ebscreen on September 24, 2020, 11:49:34 AM ---If base channel is already made, load it as selection (ctrl+click channel)
select->modify->contract by whatever you want.

--- End quote ---

Same up to here.  Then I select inverse and delete that data from the original base channel.   I do what you do if I'm isolating something to a new layer for a different amount of choke.

Can't wait to try the script, does it use calculations?

Sbrem:

--- Quote from: ebscreen on September 24, 2020, 03:36:48 PM ---Attached is a PS script I wrote that will automatically create a choked base from all channels.

If the channel is named "White" is will add to base but not choke.

If the channel is named "Blk" (stupid PS/Illy color name conflict issue) it will not add it to the base.

--- End quote ---

So, that's when there is no base white yet, yes? That's pretty much how I do some of them, I never thought to make an action of it though, cool.

Steve

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