Alpha to selection

[Pierre]

I've searched on the forum, but I've not found :
How to do an "alpha to selection" (Gimp) for layers that selects only the image in the layer and not the entire layer ?

[photoken]

Tool...Mask...Mask from Alpha.

It's worthwhile to read the Help....

[Pierre]

Thanks.

It's worthwhile to read the Help....

Oh ? Really ?

[Herbert123]

I recall that it was possible to load up the luminance values of a mask or image with a quick key combo. I had to load up a layer mask's white/black channel as selection today, and I can't seem to find that option anymore? I distinctly remember it was possible in an earlier version to load up a selection based on luminance values...

[erikals]

PL
you sure that wasn't a plugin...

i know there's a plugin somewhere that does it (i think)

[bkh]

I don't have PL here, but there's a menu command – layer mask -> apply to mask, I think. You can assign a key combo to it. Or shift-click on the preview icon in the layer panel.

Cheers

Burkhard.

[erikals]

PL
there's a "create from mask" but that's it as far as i can see...

[Herbert123]

Weird, today it is working again for me: <ctrl> click on a layer to load up transparency as a selection/lasso, <shift>-click to load up the values as a selection/lasso.

I use it all the time intuitively, and the other day the shift key would not allow me to load up selections based on value. That, or I was out of it

[erikals]

PL
by the way, wonder, did you ever find an alternative to the Un-Muliply plugin ?
http://www.ayatoweb.com/download/down04.html

[evren]

PL
by the way, wonder, did you ever find an alternative to the Un-Muliply plugin ?
http://www.ayatoweb.com/download/down04.html

On beta releases, there it comes with "Color to transparency" option.
Also there is "replace color" function but can't work on weak contrasts.

[Herbert123]

PL
by the way, wonder, did you ever find an alternative to the Un-Muliply plugin ?
http://www.ayatoweb.com/download/down04.html

The "color to transparency" adjustment layer is the response of the Hubers to that plugin. Works better than the plugin, and offers much more control. I use it quite often. Because it is an adjustment layer, it is very simple to stack it for different colours.

[erikals]

PL
nice

wonder, do you know if PhotoShop have something similar ?

[evren]

wonder, do you know if PhotoShop have something similar ?

Who cares...

[Herbert123]

PL
nice

wonder, do you know if PhotoShop have something similar ?

The only other option I know of, is the unmultiply black filter in FilterForge (which, I believe, was created by the same author of the original plugin).
https://www.filterforge.com/filters/11369.html

But Photoline's color to transparency is really much nicer and more controllable. And it works for any colour.

[erikals]

PL
thank you

might give that plugin a go then... :]