Animemes

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Memes related to anime. Animemes.

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.tar.xz (i.imgur.com)

submitted 10 months ago by hmmm@sh.itjust.works to c/animemes@ani.social

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[–] abfarid@startrek.website 46 points 10 months ago (3 children)

No way media compressed 5x.

[–] Anafabula@discuss.tchncs.de 15 points 10 months ago (1 children)

Maybe they store images as uncompressed .bmp for some reason

[–] Lichtblitz@discuss.tchncs.de 4 points 10 months ago (2 children)

bmp should not compress more than other media files. jpeg, png, etc. can compress so much because they are lossy

[–] Kwdg@discuss.tchncs.de 11 points 10 months ago (1 children)

Png is lossless

[–] Lichtblitz@discuss.tchncs.de 2 points 10 months ago

You're right. png can be lossy but that's uncommon in the wild.

[–] Anafabula@discuss.tchncs.de 4 points 10 months ago* (last edited 10 months ago) (1 children)

Three files of the same image: A png (15.7MiB), a bmp (28.8MiB) and a bmp.zip (16.4MiB)

PNG actually uses the same compression algorithm as ZIP (DEFLATE).
Here are the files.

[–] Lichtblitz@discuss.tchncs.de 3 points 10 months ago* (last edited 10 months ago) (1 children)

The image doesn't look like a photo. The meme is about porn. Digital images can contain large areas of repeating patterns (uniform color areas for example) that can be compressed losslessly pretty well. Even slight noise from an image sensor can block that kind of compression.

[–] Anafabula@discuss.tchncs.de 7 points 10 months ago* (last edited 10 months ago) (1 children)

With a picture from Unsplash:
Three files of the same image: A png (34.5MiB), a png.zip (34.5MiB), a jpg (4.9MiB), a bmp (98.2MiB) and a bmp.zip (65.1MiB)

ZIP compression of bmp is worse, but still compresses more than png. Here are the files.

[–] Lichtblitz@discuss.tchncs.de 5 points 10 months ago* (last edited 10 months ago)

Fascinating. That's much more than I expected. Thanks for taking the time.

[–] reev@sh.itjust.works 2 points 10 months ago

Was thinking the same thing

[–] hmmm@sh.itjust.works 0 points 10 months ago (1 children)

Why are you surpried? It's actually possible. You just need so much computing power like around 64 GB ram and High End CPU to Pack and Unpack both.

[–] abfarid@startrek.website 8 points 10 months ago* (last edited 10 months ago)

Because modern media files are already compressed by default and have very little redundancy in them.