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Is there any way to save storage on similar images? (lemmy.pe1uca.dev)
submitted 1 month ago by pe1uca@lemmy.pe1uca.dev to c/selfhosted@lemmy.world
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So, I'm selfhosting immich, the issue is we tend to take a lot of pictures of the same scene/thing to later pick the best, and well, we can have 5~10 photos which are basically duplicates but not quite.
Some duplicate finding programs put those images at 95% or more similarity.

I'm wondering if there's any way, probably at file system level, for the same images to be compressed together.
Maybe deduplication?
Have any of you guys handled a similar situation?

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[-] just_another_person@lemmy.world 4 points 1 month ago* (last edited 1 month ago)

Well how would you know which ones you'd be okay with a program deleting or not? You're the one taking the pictures.

Deduplication checking is about files that have exactly the same data payload contents. Filesystems don't have a concept of images versus other files. They just store data objects.

[-] pe1uca@lemmy.pe1uca.dev 4 points 1 month ago

I'm not saying to delete, I'm saying for the file system to save space by something similar to deduping.
If I understand correctly, deduping works by using the same data blocks for similar files, so there's no actual data loss.

[-] dgriffith@aussie.zone 1 points 1 month ago

I don't think there's anything commercially available that can do it.

However, as an experiment, you could:

  • Get a group of photos from a burst shot
  • Encode them as individual frames using a modern video codec using, eg VLC.
  • See what kind of file size you get with the resulting video output.
  • See what artifacts are introduced when you play with encoder settings.

You could probably/eventually script this kind of operation if you have software that can automatically identify and group images.

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this post was submitted on 05 Sep 2024
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