4 ms·
It doesn't come from "oversharpening".
by astrange 2y ago
It doesn't come from "oversharpening".
- cvz 2y agoSharpening and bandwidth-limiting have the exact same effect, because the maximum sharpness of an image (like any other signal) depends on its bandwidth. There is no difference in the type of artifact produced. That's why the artifact from both has the same name of "ringing".
- astrange 2y agoIt doesn't come from "sharpening" at all though. That implies an increase in frequencies. This compression artifact comes from rounding them, so they're moved in both directions.