3 ms·
It would also be better to compute the min/max/avg difference of luma/chroma over the whole image than only do a manual comparison by eye.
by gary_0 4y ago
It would also be better to compute the min/max/avg difference of luma/chroma over the whole image than only do a manual comparison by eye.
- spider-mario 4y agoBeware the streetlight effect: https://www.discovermagazine.com/the-sciences/why-scientific-studies-are-so-often-wrong-the-streetlight-effect https://www.discovermagazine.com/the-sciences/why-scientific... Such metrics are easy and tempting but one should make sure that they actually correspond to something that matters. A similar point is made by Zoltan Dienes in his 2008 book “Understanding Psychology as a Science”: https://pbs.twimg.com/media/Ff_BUhTXEAAZZrA?format=png&name=4096x4096 https://pbs.twimg.com/media/Ff_BUhTXEAAZZrA?format=png&name=...
- jonsneyers 4y agoThe whole point of lossy compression is to lose numerical information in a way that doesn't lose visual information. Computing the amplitude of the numerical loss is not very relevant, since it's the visual loss that matters (and those two things are only weakly correlated).