Moiré no more (How to de-moiré a halftoned photo)

For those who hurt their heads thinking about why this works:

The bright dots show that there is lots of energy in certain repeating edges (the halftone dots). Since we don't want that energy, we force it to zero by painting it black. This this is essentially saying: "delete all the halftone dot edges, keep all other edges".

A rare article where all the auto-playing animations actually added something. Very nicely done.