I doubt the US is ahead in this area. China gains heaps upon heaps or practical experience in CV by sheer virtue of the breadth of its surveillance networks. Not to say we aren't doing the same here in the US, but efforts seem to be much more scattered
It’s a positive loop. More effective surveillance network -> Larger investment (from government or government contract) -> more application/startup/new programs -> more research funding/aggressive hiring -> higher recognition for CV/ML researchers/Engineers -> More and more people doing CV/ML -> More data, algorithms and applications-> more effective surveillance network. Btw it got deployed at scale in real world which is a huge advantage for progressing any CVML research
Not to mention nowadays Deep learning is pretty much a big data game.
> But isn't that orthogonal with developing the algorithms?
Assuming it is - China is also competitive on developing algorithms. A few months ago there was a post on explosion of AI papers submitted by authors at Chinese research institutions, with no signs of slowing down.