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by jsprogrammer 3979 days ago
A rectangular pool with a flat bottom (probably accounts for the majority of pool volume world-wide) would be pretty easy to have full camera coverage over with minimal image distortion. Each object could be easily tracked for time underwater, depth, etc. (and expanded to track fine motion as well) Objects that stay near the bottom are suspect. The system could alert lifeguards to the exact location of a victim.

You could even have an auto-drain feature if you desired.
1 comments
yellowapple 3979 days ago
Right, but my point is that we're not quite at the point where a computer can reasonably process that much visual input, determine whether or not something is exhibiting the signs of drowning, and alert a lifeguard with a minimum of errors. False positives will lead to personnel confusion, and false negatives will lead to dead swimmers.

This isn't to mention that automation does encourage complacency. One of the primary reasons for the recent Malaysia Air jet disappearances according to investigations is an excessive reliance upon automated systems to fly planes, and insufficient knowledge of flying without such tools. I reckon a similar situation could be a real danger here as well (if not amplified considerably; most lifeguards (at least where I've lived) were usually highschool students doing it as an extracurricular/volunteer activity, summer job, etc., and teenagers aren't exactly known for having an above-average attention span).

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chucksmash 3978 days ago
> False positives will lead to personnel confusion

False positives can lead to death too. This article talks about alert fatigue that contributed to a fatal medication error at UCSF:

https://medium.com/backchannel/beware-of-the-robot-pharmacis...

I'd be wary of giving a lifeguard who might be straining to pay attention to n things an n+1th thing to pay attention to.

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yellowapple 3978 days ago
That's what I meant by "personnel confusion", yes. A.k.a. the "cried 'wolf'" effect; how can a lifeguard be expected to treat this alarm seriously when all the other ones have been false positives?
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