Is there any way to just check for the color black and then filter that color out? Gimp has way to do it… but would take forever on 200+ images unless someone else knows a way to do for multi files?
You can write a Python program to do it pretty easily using Panda’s PNMImage class (or the PIL if you’re more comfortable with that). You just need to add an alpha channel and set the alpha value to 0 where the color is black and 1 where it is not black, and then write out the image again.
I understand you can also write a Photoshop script to do this, but I know little about that. It might be possible to write a Gimp script as well, but again I know little.