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Creating a mask from an image's transparancy

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Old 04-12-2010, 08:05 PM
kkamin kkamin is offline
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Creating a mask from an image's transparancy

I have been using Fluid Mask 3 to cut out complicated subjects from backgrounds--things like hair. It is not important to be familiar with this specific program to understand this question. What the program does is removed the background and adds varying degrees of transparency to the edges. It becomes a destructive way of editing since it deletes pixels. I wish it would create a mask in PS instead of removing the pixel information.

Is there a way to select the transparent and semi-transparent portions of the cut-out image and create an alpha channel out of it, so I can apply it as a mask to the original image?

I know there are work arounds for doing what I want to do, but it would be a lot easier if there is a way to simply create an alpha channel.

Thanks,

Kevin
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Old 04-12-2010, 08:13 PM
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mistermonday mistermonday is offline
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Re: Creating a mask from an image's transparancy

Kevin, If I understand what you are trying to do, then just hold the ctrl key and click on the thumbnail of that cut-out layer. Then Ctrl+Shift+I to invert the selection. Finally Select>Save Selection.
Regards, Murray
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Old 04-12-2010, 08:20 PM
kkamin kkamin is offline
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Re: Creating a mask from an image's transparancy

Cool! Thank's so much
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Old 04-20-2010, 10:36 PM
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namphoto namphoto is offline
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Re: Creating a mask from an image's transparancy

You can't do that with Fluid Mask, it makes its mask quite crudely, mainly consisting of hard edges. When you do select the cutout that Fluid Mask has created, the selection is actually two pixels larger or so, and your alpha channel has to be fiddled with to get lookin' good. I highly recommend learn to channel mask, it has been my new found friend.
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