How to make a color "transparent"?

[freakflag]

Hey! I want to know how to make a certain color in a picture "transparent".
In Gimp, it is very easy, but I couldn't find this tool in Photoshop. I don't know how to explain what I mean, so I made screenshots from this tool in Gimp.

1. I have a picture and want to make the color Black transparent. Example:






2. Then I create a new layer under the first layer.
a) I can use one color:


b) I can use a gradient:


c) I can put a different picture under the first layer:



Can anybody please tell me how I can make a color transparent in Photoshop?
Thank you!

 

[iDad]

see attachment you will see opacity levels placementView attachment 6044View attachment 6043

 

[Stric9]

If you want to make black or white transparent you can do it with the layer styles menu.

If you want to pick a specific color I would use color range then make a mask.
Then you may want to work with the blend modes and opacity slider.

 

[freakflag]

Thanks for the help, but this is both not exactly what I was looking for.
The first ist just turning the opacity down, that's not what I meant.
And the second is wrong as well, the edges are too hard.
Here is the difference:
..............................GIMP ........................................... PHOTOSHOP


And to make it more obvious, I added a pink background:
..............................GIMP ........................................... PHOTOSHOP

 

[Hoogle]

use the quick selection tool and select emma copy her to a new layer and the reduce the background layers opacity

 

[Stric9]

I agree, but you asked how to make a color transparent. Not how to remove a background.

 

[freakflag]

I agree, but you asked how to make a color transparent. Not how to remove a background.

Because I don't want to remove a background.
I want to know how to make a certain color transparent, like in the Gimp sample.


@Hoogleman: That's not what I wanted. I didn't only want to make the background transparent. That would look like this:

But Emma looks like before. The Black of Emma is not transparent.

Nevermind, I give it up. There seems to be no tool at Photoshop that can do what I mean.

 

[Hoogle]

well several options for that use magic wand with right tolerence then select the colour you want press delete or use the magic eraser that will delete 1 colour in a section

 

[Stric9]

I got these result using the blending options sliders I think this will get you the desired effect but you will have to play with them to get exactly what you want.
To me they look very similar to your examples but I don't know if it is what you want. To split the handles on the sliders use your alt/option key.