I read an interesting article the other day. I’ll skip to the end to show you the result. Check out this pair of binary images:

Not too fascinating, huh? If you print both images out on transparency though, and stack them together, you’ll get this…

Hopefully that worked (with my limited CSS skills, I don’t think I got it exactly right). I couldn’t get the CSS exactly right, so the above image is really just the pairwise minimum of both images above. But how I accomplish this miracle? My own simple python implementation of the ideas cribbed from this page. Script to come later.