It is still Fizzbuzz++: they're not looking for computer vision researchers. They're looking for programmers who are competent enough to be worth their time interviewing. If you can go from hints in the direction of the solution to a) reading library documentation, b) coming up with an innovative solution to an only-partially specified problem, and c) actually producing functioning code which implements your solution, you are heads and tails above the hiring pool.
I agree with you, and I know that you have some serious knowledge about that, but seriously, reading HN makes me feel that this hiring pool would be filled only with programmers that could solve any type of code-puzzle in their sleep.
