[SOLVED] convert to gradual alpha channel
Posted: 2010-10-12T07:39:13-07:00
Hi,
I'm a new IM user and I can't see to find how to convert a black background into a transparent one AND compensate antialiasing (black blending)
I found in this forum that the command line I needed was something like
convert original.png -transparent black x_copy.png
But the original image had antialiasing so the thin shape sometimes blends into the black background.

So the resulting picture has dark edges around the shape.

I think this alpha creating process could be enhanced by, as an option, beeing gradual and more, correct pixel color in order to compensate the color it erases.
Or maybe this process already exists and I didn't find how to activate it.
Thank you!
Art.
I'm a new IM user and I can't see to find how to convert a black background into a transparent one AND compensate antialiasing (black blending)
I found in this forum that the command line I needed was something like
convert original.png -transparent black x_copy.png
But the original image had antialiasing so the thin shape sometimes blends into the black background.

So the resulting picture has dark edges around the shape.

I think this alpha creating process could be enhanced by, as an option, beeing gradual and more, correct pixel color in order to compensate the color it erases.
Or maybe this process already exists and I didn't find how to activate it.
Thank you!
Art.