[rlanday]

> Besides removing information from the file that doesn't affect the rendered image

You can do this if the goal is pixel perfect accuracy, but Flickr can’t do this since they have “a long-standing commitment to keeping uploaded images byte-for-byte intact”…

[londons_explore]

I bet a lot of those ICC color profiles are the same across many images though... One you could strip the metadata and keep it in a separate deduplicated database, and then reassemble when the user accesses the file.