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What good does encryption do? All someone has to do is copy or move the sign.
by choward 6y ago
What good does encryption do? All someone has to do is copy or move the sign.
- zamfi 6y agoThe sign could easily be tied to location, no?
- Robotbeat 6y agoI think your question was rhetorical, but there's an answer: Because it means that modifying the sign is not useful. (Unlike, say, modifying a speed limit sign.) Also, the fiducial can encode its orientation or position (perhaps in relation to other nearby signs... and could be a hash or checksum of its position, to save space), so the vehicle would be able to know there's a mismatch and thus mark the sign as suspect/unreliable if it was in any other spot or orientation. There are other solutions to these. But the same problem you describe occurs if someone moved a human-readable sign (but without any way to checksum). I think fiducials are not a panacea. They are just one additional data source in what needs to be a robust sensor-fusion approach. But they make a whole bunch of stuff in machine vision a LOT easier to solve. Machine-learning approaches have the same problems but with less opportunity to address them, less robustness, and more overhead.
- jayd16 6y agoI supposed location and information could be added to a sign along with a certification or checksum. As long as its done in a way that doesn't require exact placement, signs found outside their location are ignored. ...something like, "Forest St. Northbound CLOSED (lat,lon) <encrypted checksum>"?