I did this simple algorithm a few years back that tried faking some kind of pixel by pixel drawn antialiasing to 1 bit images for an intro project and this morning decided to do a quick and dirty java tool for it that would be easier to use. i was thinking it could be fun to share it as well in case someone finds it interesting.
The source code is included so if you have problems or want it improved just fix it :P otherwise i wouldn't recommend looking at the code too much.
first step is to do a black and white image in photoshop/grafx2/etc that might look something like this:
then you process it with the tool by typing
java feikkaa sourceimage.png
or something in the terminal / whatever in the directory with the tool in it.
the output will be in sourceimage.aa.png and looks a bit like this:
still looks kinda shitty so you need to add some colour in photoshop with the color balance adjustment for example:
since you're most probably not quite satisfied with the result you can do some retouching after the processing is applied. you'll probably be saving a lot of time anyway compared to doing it all by hand.
the tool is
here for now.