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A comment on Hacked billboards make Teslas see phantom objects causing them to swerve or stop. Parent comment

Re:Hacked billboards make Teslas see phantom objects causing... by gruturo on Thursday October 15, 2020 @06:31PM (#24794998)
While I agree with you on mandating it, a LIDAR "only" gives you a 3D point cloud.

Great for detecting if an object is in your way - but it cannot read a stop sign, you still need a camera system for that - so they still have to harden it against this hack (and who knows how many to come).

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Re:Hacked billboards make Teslas see phantom objects causing... by bonestamp2 on Thursday October 15, 2020 @11:54PM (#24797283)
> so they still have to harden it against this hack

True, but LIDAR should make that detection more robust.

For example, if a stop sign is on the same plane as the object that surrounds it, that's a strong signal that it is not a real stop sign but rather a projected or displayed one.

That's much harder to detect with computer vision alone, especially if they're dealing with hackers who can test it with a real car and continually iterate on it to find different ways to trick it.

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Re:Hacked billboards make Teslas see phantom objects causing... by nitrogen on Friday October 16, 2020 @12:36AM (#24797511)
For example, if a stop sign is on the same plane as the object that surrounds it, that's a strong signal that it is not a real stop sign but rather a projected or displayed one.

It's conceivable that in denser or older areas, signs are sometimes placed on structures because there isn't room for a pole.

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Re:Hacked billboards make Teslas see phantom objects causing... by bonestamp2 on Friday October 16, 2020 @12:47AM (#24797579)
Agreed. I didn't say it's definite, I said it's a strong signal. Even strong signals need to be weighed against other available data.

Apple Maps shows stop signs and traffic lights on the map. A database like that would be another strong signal, but also not always accurate.

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Re:Hacked billboards make Teslas see phantom objects causing... by tshaddox on Thursday October 15, 2020 @10:23PM (#24796770)
Wouldn't that "hack" just be as easy as sticking an actual stop sign somewhere it's not supposed to be, or removing a real stop sign? That would obviously fool a human driver just as much, and it has actually happened, and killed people.
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