In Gimp, there is a command called "color to alpha". What is the equivalent of this command in Photoshop? [please?]

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Hi people. Another saltquestion related ection/transparency. Im making this transition from Gimp PS and Im trying to make the process faster by asking specific questions, because its still taking me by watching videos. At this point Im just trying to learn my way around the interface of the program rather than learning the science itself.


Back to the question: in Gimp "color to alpha" removes a particular color of the image while keeping the other colors intact. Another way to do is to put the tool eraser to remove a particular color when you apply it. How do the exact equivalent or closed cela in Photoshop? Basically, my questions are:


What command or option use to remove a particular color both in image? [Ex. There is the American flag and I want to turn red in alpha gradients]

How to set the BRUSH tool to make it an ERASER tool, affecting only a particular color or how to configure the Eraser tool so that it affects only a specific color in the image?


All your time and info is much appreciated.



Short answer: No. even after all this time, Photoshop still doesn't offer such a handy tool. There is a Select statement--> the color range option, but it gives quite severe results and does not mix, alpha, etc. into account.

Alternatively, the BlendIf option can also work in some cases.

To remove the black (or white if you reverse the image first), the Unmultiply plugin can be used: http://www.ayatoweb.com/download/down04.html

Although I'm not sure if it still works in the latest version. The developer has created a FilterForge version, which works very well (but requires a license FF).

An older plugin can be downloaded here:

http://www.Cybia.co.UK/TheWorks.html

Only works on 32-bit hosts Photoshop compatible plugin, however. So no luck with a 64-bit Photoshop.

It's really a shame: Photoline has a bright "color to transparency" no destructive layer (Stackable!) setting that does exactly what Gimp "color to alpha" does, but with a lot more control:

Here again, no tool offers everything, including Photoshop.  Just run Gimp for these cases.

Tags: Photoshop

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