if the brain were better at deconvolution, nobody would need glasses.'nupdate: i was wrong

[lritter@mastodon.gamedev.place]

if the brain were better at deconvolution, nobody would need glasses.

update: i was wrong

[rygorous@mastodon.gamedev.place]

@lritter They would. It's not actually a convolution thing

[lritter@mastodon.gamedev.place]

@rygorous isn't blurring an invertible function?

[rygorous@mastodon.gamedev.place]

@lritter 1. Deconvolution is a thing, but even the pure math form is inherently unstable for most filters (and actually non-invertible for others).

2. Being out of focus is not actually the same as blur, and not a convolution filter. It's close in the simplest cases, like when you're looking at say a page of paper with no other occluders in sight, but the general case is much more complicated.

[lritter@mastodon.gamedev.place]

@rygorous is the information destroyed yes or no?

[aeva@mastodon.gamedev.place]

@lritter @rygorous *takes off glasses* yes. very yes.

[aeva@mastodon.gamedev.place]

@lritter @rygorous it's too bad I can't take a screenshot of what I see without my glasses on, because the effect isn't so much blurring in the graphics sense as a confusing disintegrating mess. consider, the brain is quite good at making stuff up when presented with incomplete information. if you see text briefly like a sign or something, you'll see and recognize a message immediately, but it might not be the actual message. I can't do that with my glasses off, text doesn't resolve at all.

[rygorous@mastodon.gamedev.place]

@aeva @lritter yeah same

That's why the stuff they ask you to read during an eye exam is random letters. If it spelled actual words it would be useless for determining how good your vision actually is because the brain is scarily good at inferring missing information when it fits known patterns