|
Image > Mode > Grayscale
Set foreground color to black. Add layer > Foreground color (i.e., add a black layer)
Set layer mode to "Burn" (I think it's this one, it should make everything look black, except for completely white stuff on the bottom layer).
Select the bottom layer. Color > Levels. Move left slider up to where the curve starts to rise. Move right slider to where the background looks almost all white, maybe with some speckles. (Make sure you have preview enabled.)
Create a transparent layer between the two.
Set foreground color to white, paint on the middle layer to get rid of the speckles, especially on the borders of the image.
Disable the top (black layer). Your image should now look fine.
|