Topic: [Feedback wanted] I made a help page about Image Quality

AoBird said:
For a few bytes? No.

Filesize. Is. Irrelevant.

darkazma said:
bunch of text

1496542-2.png

is JPG resaved as PNG, you should see JPG compression clearly. 1496542.jpg is preferred as it's higher quality, higher resolution and no funky stuff with filetype.
764152.jpg is only ever so slightly higher resolution, but 764152-2.png is lossless, so added resolution doesn't justify details lost with compression, so PNG is preferred.

When the resolution between two images is differend, then you shouldn't compare differenciation as downscaling will effect image quality and it can change depending on integrer and what downscaling method you used (nearest neighbor, bilinear, lanczos, etc.). With two differend sized images you should simply compare manually with eye. If you have problems, simply use zoom, image editors really commonly have nearest neighbor zoom which makes it even easier while browsers usually apply filtering to zoom.

With post #843349, there's difference, but we are nearing the point where it's first of all impossible to determine which version is the superior one (effected areas are on white so they look visually identical) and when the difference amount is 0.0001% it becomes nitpicking so usually that's in the area where it's ruled identical, even if on paper it's not 1:1 identical. Keep common sense in the game, even if sometimes the difference on replaced posts are low.

Updated by anonymous