ELI5. How do some pictures have such massive file sizes

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Regular pictures taken with phones range from about 10Kb to a couple hundred Mbs but today I see a post about a picture of brain tissue with a file size in petabytes. I also know that some NASA pictures are very large(dunno why) but even that makes more sense than a zoomed in pic of brain tissue. Obviously the instruments used are different but why such a large difference.

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Anonymous 0 Comments

In this case it’s not a *picture* that is 1.4 petabytes. It’s a bunch of **3d data** at insane resolution.

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