this post was submitted on 02 Feb 2025
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Animemes

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Memes related to anime. Animemes.

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[–] abfarid@startrek.website 44 points 1 month ago (3 children)

No way media compressed 5x.

[–] Anafabula@discuss.tchncs.de 14 points 1 month ago (1 children)

Maybe they store images as uncompressed .bmp for some reason

[–] Lichtblitz@discuss.tchncs.de 4 points 1 month 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 1 month ago (1 children)
[–] Lichtblitz@discuss.tchncs.de 2 points 1 month ago

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

[–] Anafabula@discuss.tchncs.de 3 points 1 month ago* (last edited 1 month 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 2 points 1 month ago* (last edited 1 month 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 1 month ago* (last edited 1 month 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 1 month ago* (last edited 1 month ago)

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

[–] hmmm@sh.itjust.works 2 points 1 month 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 7 points 1 month ago* (last edited 1 month ago)

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

[–] reev@sh.itjust.works 2 points 1 month ago

Was thinking the same thing