How do I convert a image on from grayscale to black and while (1-bit palette) using command line tools?
My new scanner only scan color or grayscale, and not "lineart", so I'm finding my self open gimp and selecting "Image -> Mode -> Indexed" and then "Use black and white (1-bit) palette" on quite a lot of images.
So I'm searching for a command line tool that can do this without any gui.
There seems to be some support in gimp itself to do this
But I'm not sure how to use this "gimp-console".
Note: I am using Ubuntu