I am a total newbie to image manipulation, so please be patient
I have an image with a black background and an image in various shades of grey. I would like to, i guess, "invert it" in such a way that black becomes white, and the various shades of gray become transparent. Basically I want to have the following:
Black -> White with 100% opacity - totally white
Grey with 10% black -> White with 90% opacity - white with a bit of transparency
Grey with 70% black -> White with 30% opacity - white with a lot of transparency
White -> White with 0% opacity - completely transparent
How can I achieve this?
Thanks!
