number plate recognition
Discussion
Interesting...
On my way to work, there is a local security firm that has put up a number plate recognition camera that flashes up the number of each car that enters.
No idea what they do with them and how legal this is, but that's not the interesting thing.
The number it flashes up from my car is wrong, it thinks it starts with a W when it actually starts with an N.
I had a look at the front number plate this morning and it seems that the screws are confusing the camera. To the naked eye it is completely obvious that it starts with an N, however there is a black holding screw that encroaches in the white space in between the top of the N.
As I said, from any position you care to look, to the naked eye it is completely obvious what the letter is, it appears that isn't the case for the camera.
My question is, do all recognition cameras use the same technology?
>>> Edited by trooper1212 on Tuesday 25th May 09:57
On my way to work, there is a local security firm that has put up a number plate recognition camera that flashes up the number of each car that enters.
No idea what they do with them and how legal this is, but that's not the interesting thing.
The number it flashes up from my car is wrong, it thinks it starts with a W when it actually starts with an N.
I had a look at the front number plate this morning and it seems that the screws are confusing the camera. To the naked eye it is completely obvious that it starts with an N, however there is a black holding screw that encroaches in the white space in between the top of the N.
As I said, from any position you care to look, to the naked eye it is completely obvious what the letter is, it appears that isn't the case for the camera.
My question is, do all recognition cameras use the same technology?
>>> Edited by trooper1212 on Tuesday 25th May 09:57
Sometimes cameras "see" better than the human eye (eg. in the (now infamous) Monacco Tunnel but they (with associated computing) are far worse at distinguishing and resolving complex patterns than the human eye/brain.
The BiB here can tell us what happens when an "anomaly" id detected by ANPR, but I suspect that any such are resolved by the keen eye of the TrafPol. WRT scameras, the photographs are read by people - who, demonstrably, can still make mistakes.
WRT to SPECS (as a special case), there is some risk that a false positive could be generated, but the probability is low and should be detectable (by the "accused" if no-one else). It is more likely that the technology would make the same "mistake" on each occasion, thus ruling out "error".
Streaky
The BiB here can tell us what happens when an "anomaly" id detected by ANPR, but I suspect that any such are resolved by the keen eye of the TrafPol. WRT scameras, the photographs are read by people - who, demonstrably, can still make mistakes.
WRT to SPECS (as a special case), there is some risk that a false positive could be generated, but the probability is low and should be detectable (by the "accused" if no-one else). It is more likely that the technology would make the same "mistake" on each occasion, thus ruling out "error".
Streaky
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