How to add ringing artifacts? A ringing artifact is one where edges will have a sort of high-contrasting banding pattern across them. https://en.wikipedia.org/wiki/Ringing_artifacts



Even better would be to have multiple ringing bands, as seen here using a sinc filter:



I already have one way of adding this type of artifact by resampling it with a windowed sinc filter in ImageMagick, but I would like to be able to add this in blender directly. How do I do this?
Try using a Sharpen filter in the compositor: