Re:Film grain synthesis in AV1 (2019)
by adgjlsfhk1 on Monday July 18, 2022 @06:04PM
(#32144585)
It really doesn't. The whole reason this technique works is that our brain generally processes effects like noise and grain in terms of macro properties, and even if none of the pixels are anywhere like the right value, it will still look "right" as long as the noise distribution is closish.
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Re:Film grain synthesis in AV1 (2019)
by NonNefarious on Tuesday July 19, 2022 @02:23AM
(#32148175)
No it really doesn't what? I don't know what that comment refers to.
It doesn't require perfect removal of the original film grain. A mishmash composed of remnants of the original grain combined with new synthetic grain can still look correct to our brains.
Re:Film grain synthesis in AV1 (2019)
by NonNefarious on Tuesday July 19, 2022 @08:09PM
(#32159648)
According to this paper, they're going a lot of effort to reproduce the original grain very accurately. If they combine that with some half-assed residual grain from the original, why go to all the effort to faithfully reproduce it? Based on your assertion, it wasn't really necessary to begin with.