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> Is the prioritization based on a machine analysis of the photo, or on the response of earlier users to the photo?

I would bet the latter. Why go to the trouble of analysing difficult stuff about body structure, when you can just let users "decide".

I think we should formulate a law, something like "every internet imageboard, if left to user-moderation, will eventually turn into pr0n".

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It's likely that FB uses user response to posts to decide how to prioritize them. However, several patents describe systems where they analyze (using CV) and make decision on the importance of pictures before they are published.

Remember kids, just because a Megacorp has a patent on something, doesn't imply that they are using an approach like this anywhere in production.

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