The question What is the state-of-the-art on using computers to “clean-up” images? has a comment to say:
This question is about image / signal processing, which is not within the scope of this site. However, there is a SE for signal processing here: dsp.stackexchange.com
This question does indeed appear to be on topic for Signal Processing. Is it also off topic here?
Note that as image processing seems to be a different topic to general computer vision, I consider this a distinct meta question from Is computer vision in scope?