1) "Scales badly with the number of images" seems like a research problem to me. 2) In theory almost everything is "just" a compute problem (just enumerate or

1) "Scales badly with the number of images" seems like a research problem to me. 2) In theory almost everything is "just" a compute problem (just enumerate or search over all possibilities - of course this may not finish for millenia). But if Moore's law says the compute is 20 years away, I think it's reasonable to call it a research problem.