How to add ringing artifacts?

Question

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?

save to a jpeg file with a low quality. You'll see lots of those. — , Sep 17 '15 at 00:39
@cegaton I already have a better way to do it that I linked to. But yes, if there were no other way I definitely might try that. — AJMansfield, Sep 17 '15 at 00:41

score 3 · Answer 1 · answered Sep 17 '15 at 03:46

3

Try using a Sharpen filter in the compositor:

answered Sep 17 '15 at 03:46

gandalf3

You could add a blur node after sharpen to optain something closer to the example – parameciostudio Sep 17 '15 at 09:18

1 Answers1