I tried this to get a feeling how practical this is. It seems to me that this would only work in very rare situations. It needs some kind of pattern that is cr

I tried this to get a feeling how practical this is. It seems to me that this would only work in very rare situations. It needs some kind of pattern that is created with the same font. This pattern gets really large if you add a lot of chars (i.e. a-z already makes it huge). I tried this with a really simple example (numbers only, cutting exact frame of pixelated image, same font for pattern) and it didn't produce any useful result. TBH that doesn't look all that impressive. It's not a "throw pixelated image in here and get the unpixelated result" tool. (It's still of course valid to make the point that pixelation can be insecure. It's of course very much possible that much better such tools - likely by throwing in some ML - are possible and may even exist in the hands of people who won't share them on github.)