This is from an album which sold over 1.2m copies in the UK; one of the biggest records of the 90s: https://www.youtube.com/watch?v=SD8gO8TAr4s

This is a very active field of research. Another thread worth pulling on is Mask R-CNN: https://arxiv.org/abs/1703.06870

It's not quite as simple as "this one has highest mAP, let's use it"; the tradeoffs are complex. In particular, as you can see in the image here, one thing DeepLab doesn't do is segment instances – so you get a mask of "people", not a mask per person. Mask R-CNN does a better job on that by design, because it predicts both bounding boxes and a mask per bounding box.

(which even if you disregard everything else is a really good line to take if you're after recruiting good machine learning engineers!)

This is fine – in a macroeconomic sense – but of course it sucks if you're one of the companies being disrupted.

http://www.cedar.buffalo.edu/~srihari/talks/Telcordia.pdf

Given group 1 is many times bigger than group 2, that's a very strong statement, but it's borne out in all the data I've ever seen, both public and private.

In fact, I'd say "target the web" if you're going for maximum accessibility and you're not driven by commercial factors, though that doesn't work for every app and the usability/discoverability issues can be real. Favoring any commercial platform as a government is a very uncomfortable place to be.

To first order, iPhone owners spend money. Android owners don't. This is because your average iPhone user cares more about what phone they're using and simply uses it more.

This is a first-order approximation. The small percentage of people who actively choose Android do spend and do use their phones a lot, and by goodness are they vocal, but the more useful way of thinking about the market is not two-segment, it's three-segment:

* Vast majority: don't care about their phone OS, won't pay for anything

* Significant minority: want iPhones, will most probably spend money

* Significant but even smaller minority: actively want Android, will buy premium Android phones (e.g. Nexus, high-end Samsung), will either spend money or, with roughly equal likelihood, jailbreak and pirate everything in sight.

From this perspective iOS remains the most compelling mobile OS to target. Additionally, iOS users – on average - use apps more and for longer, though again that effect is small when you control for the kind of Android devices people go out of their way to choose.