Thanks to everyone who have helped with suggestions.
This is what I came up with:
1) Greyscale.
2) Image -> Colours -> Levels... to turn the darkest colours
into plain black, and the brightest colours into white.
This is merely a trick to remove "scan-noise".
3) RGB.
4) Filter -> Colours -
1) use the curves dialog to take the light greys and change them to
white and the dark greys and change them to black
2) add alpha channel
3) select the white by color
4) edit -> clear
should now hav eall the white transparents.
but the curves dialog is very useful for making although those gr
Stephan Henningsen wrote:
> Hi there,
>
> I have made a drawing and have scanned it. The drawing is
> black on white paper (greyscaled, not 1-bit palette).
>
> But how do I converte all the white to alpha? I've tried
> with Select By Colour, but it's not good at all, since alot
You need to
Stephan,
I think you want to use my Filters/Colors/Color To
Alpha... in the 1.2.x distribution.
First, convert it to RGB. Run the filter, select
white as your color, and let it do its magic.
Happy GIMPing,
Seth Burgess
[EMAIL PROTECTED]
--- Stephan Henningsen <[EMAIL PROTECTED]> wrote:
> H
Hi there,
I have made a drawing and have scanned it. The drawing is
black on white paper (greyscaled, not 1-bit palette).
Now, I'd like to colour it, give it a background etc. But
first I need it to be black lines on an transparrent
background; then I can paint on a different layer and place
t
