Quote:
Originally Posted by Mentar
In this absoluteness, wrong. You can interpolate data during upscaling. Doing so has other kinds of limitations, and as a rule of thumb, the more detailed the original source is, the better you can do so.
As I wrote before, visual perception of HD is less linked to background detail, but to lines and contrasts.
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It's not wrong. You can't recover lost information, unless you make it up. Due to the nature of anime, it is easier to use filters to make things sharper, since anime typically contains lots of contrast lines and few complex textures, but you're still not recovering lost information. However, if there are any scenes with highly-detailed textures or backgrounds, you won't be able to recover those details.