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Forum: Speed, Safety, Driving and The Law Topic: Defeating ANPRS and speed cameras |
| Ash |
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Posted: Sat Aug 07, 2010 21:31
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Replies: 42
Views: 37104
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| Makes it sound alost legal! :roll: 'An invention does not necessarily have to be either legal to make, sell, buy or use in order to be granted a patent' - another piece of learned legal advice that cost me far more than it's probably worth. To be honest, I'm getting bloody fed up at the way the aut... |
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Forum: Speed, Safety, Driving and The Law Topic: Defeating ANPRS and speed cameras |
| Ash |
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Posted: Sat Aug 07, 2010 15:35
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Replies: 42
Views: 37104
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And apologies for the relatively poor quality of the pic, but it's been cut and pasted half a dozen times to be able to put it up here from the laptop I'm on at the moment.
If there's any interest, I guess I could do some new pics.
Ash |
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Forum: Speed, Safety, Driving and The Law Topic: Defeating ANPRS and speed cameras |
| Ash |
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Posted: Sat Aug 07, 2010 15:27
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Replies: 42
Views: 37104
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| You mean something like this? Plate cover.JPG 520x110mm sized IR dichroic. A device that splits a light spectrum into a transmitted porton and a reflected portion is called a dichroic. And there's only one way of doing it. In this image it's offset to the right of the plate on my old Vette. This is ... |
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Forum: Speed, Safety, Driving and The Law Topic: Defeating ANPRS and speed cameras |
| Ash |
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Posted: Sat Aug 07, 2010 13:07
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Replies: 42
Views: 37104
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Thanks for that, Steve - very interesting.
Steve wrote: I have lots of useful kit 
Yeah? Me too. Mind, I'm not sure if this is the right place to discuss how to use it to 'best effect'.
Ash |
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Forum: Speed, Safety, Driving and The Law Topic: Defeating ANPRS and speed cameras |
| Ash |
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Posted: Sat Aug 07, 2010 08:05
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Replies: 42
Views: 37104
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| Some degree of polarisation of reflected light occurs at any optical interface or surface, except at normal incidence. In the context of a camera viewing a number plate, the number plate is effectively a single surface. The reflective element is the white/yellow sheet material onto which the numbers... |
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Forum: Speed, Safety, Driving and The Law Topic: Defeating ANPRS and speed cameras |
| Ash |
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Posted: Fri Aug 06, 2010 20:47
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Replies: 42
Views: 37104
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| Ah - thanks for that! Polarising filters being used to reduce windscreen reflections in an imaged scene. In order to better view a vehicle occupant. Magic! How long before ANPR moves on from reading number plates to recognising faces? Don't scoff - facial recognition software is already on the marke... |
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Forum: Speed, Safety, Driving and The Law Topic: Defeating ANPRS and speed cameras |
| Ash |
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Posted: Fri Aug 06, 2010 17:55
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Replies: 42
Views: 37104
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| Its very far from stupid, you're right. But I've happily saved a fair few bob when driving in and out of central London by working out it's foibles and getting round them. Maybe I'd change my tune if I was in court charged with perverting the course of justice, but my assessment of the chance of tha... |
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Forum: Speed, Safety, Driving and The Law Topic: Defeating ANPRS and speed cameras |
| Ash |
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Posted: Fri Aug 06, 2010 16:34
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Replies: 42
Views: 37104
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| Yeah, it's true that anyone who tries to evade prosecution for diddling the congestion charge could be accused of perverting the course of justice. And any tampering with a number plate is strictly illegal too. But it's not heinous, is it? I broke the law last Friday and I plan to do the same tonigh... |
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Forum: Speed, Safety, Driving and The Law Topic: Defeating ANPRS and speed cameras |
| Ash |
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Posted: Fri Aug 06, 2010 08:34
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Replies: 42
Views: 37104
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| Engineering types? Ha ha! Complement or insult?! Thats absolutely true - if you are observed in a mobile ANPR with one of these devices over your plate, you run the risk of being chased and stopped. And you'd deserve what you got. You can't fool all the people all of the time, just some of the peopl... |
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Forum: Speed, Safety, Driving and The Law Topic: Defeating ANPRS and speed cameras |
| Ash |
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Posted: Thu Aug 05, 2010 16:33
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Replies: 42
Views: 37104
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| To achieve optimum resolution in order for the automatic character recognition software to work most effectively, ANPR systems almost exclusively use infrared filtered silicon CCD cameras. Those that don't use an IR filter are used in close distance ANPR, such as those used in access control systems... |
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