I'm not convinced. I've always been wary of filters myself, they seem to just butcher the spirit of the sprite in question. I thought that I wasn't going to have much luck with resizing some tiny sprites (since they have less data to work with), so I tried out some hi res sprites:
And I was like, eh.
Then I tried it out on my own game's art:
And it actually didn't look that bad. It gets confused often, especially with shallow curves and diagonal lines. It works best with large, non-dithered, shaded sprites (and the background really doesn't lose much, apart from gaining the zig zag dither lines). I still wouldn't play an entire game with it, since the result is kind of crude, but it could serve as a good jumping off point for redrawing sprites at a higher resolution.
And I was like, eh.
Then I tried it out on my own game's art:
And it actually didn't look that bad. It gets confused often, especially with shallow curves and diagonal lines. It works best with large, non-dithered, shaded sprites (and the background really doesn't lose much, apart from gaining the zig zag dither lines). I still wouldn't play an entire game with it, since the result is kind of crude, but it could serve as a good jumping off point for redrawing sprites at a higher resolution.