Change color to transparency

[Monteiro]

Hi

Its possibel change color to transparency? For exempel. In one image i whant to change all black color to transparency.

It´s possibel?

Many tks

[MarkZ]

Select the black colour areas using the selection brushes (try magic wand but experiment which works best in your case) then delete. Note the various settings on the selection tools such as tolerance. Start with replace for the selector, then to modify how much is selected change to add or subtract until you are happy with the selection.

[Forriner]

Hi Monteiro,

No experts chimed in yet, so an amateur attempt

You first have to reduce an image to 256 colours: Image/Decrease colours/256 colour palette -or if that's greyed out-
Image/Decrease colours/ X colours (4-8 bits) and enter 256 there.

Then Image/Palette/Set palette transparency. It opens a dialogue, if necessary click on the colour box of the palette entry option and chose a colour from there.

You'll have to save to a file type that supports transparency -PNG and GIF do, I don't know about others.

[Monteiro]

TKS ppl

I want to make massif mode. In few clicks.

The option "color replacer" is for what?

Sorry my bad englisch

[LeviFiction]

To replace one color with another color.

[Cassel]

How about the Select color range?

- Make sure the image is not a background layer (promote it to a raster, if it is)
- Select all
- Selection > Modify > Select Color Range
- choose Black as a color and check Subtract Color Range
- adjust the Tolerance so that in the preview window, you see all the black you want, disappeared.
- Click OK (everything that is not black will be selected)
- invert the selection (ctrl-Shift-i)
- delete (all the black will be deleted)

[Monteiro]

How about the Select color range?

- Make sure the image is not a background layer (promote it to a raster, if it is)
- Select all
- Selection > Modify > Select Color Range
- choose Black as a color and check Subtract Color Range
- adjust the Tolerance so that in the preview window, you see all the black you want, disappeared.
- Click OK (everything that is not black will be selected)
- invert the selection (ctrl-Shift-i)
- delete (all the black will be deleted)

Coool. Woks fine.

Tks

[MarkZ]

How about the Select color range?

This is interesting and good to know it's there - I keep forgetting about the modifications that can be done to selections.

It seems to me that this function does the same thing as the magic wand selection tool.