for the legal bods (DVD and the like)
Discussion
This is from a colleague of mine.
If there a legal requirement for you number plate to readable by machine?
legible to the eye, but not to a camera.
eg, invisible in the infra red, or LCD persistance scanned (looks normal to the eye, but pulses about (a bit like a tv monitor on a video recording) on a recording/photograph)
If there a legal requirement for you number plate to readable by machine?
legible to the eye, but not to a camera.
eg, invisible in the infra red, or LCD persistance scanned (looks normal to the eye, but pulses about (a bit like a tv monitor on a video recording) on a recording/photograph)
bryan35 said:
This is from a colleague of mine.
If there a legal requirement for you number plate to readable by machine?
legible to the eye, but not to a camera.
eg, invisible in the infra red, or LCD persistance scanned (looks normal to the eye, but pulses about (a bit like a tv monitor on a video recording) on a recording/photograph)
"readable" 20 metres away; day and night; retro-reflective plate
ah, not what I asked though.
For instance, a TV is completely legible to the eye, but will not photograph (unless you're keen)
If your number plate scanned like a telly (ie with an LCD on a retroreflector), to the eye it would appear completely readable and normal. To a camera it would be fragmented (or even off with a flash detector)
Also, with an IR block filter, it would also appear completely normal to the eye, but IR cameras (like the congestion charge ones) would see black/grey. (I know the chap who tested the kit!)
So, what area does the legislation cover?
For instance, a TV is completely legible to the eye, but will not photograph (unless you're keen)
If your number plate scanned like a telly (ie with an LCD on a retroreflector), to the eye it would appear completely readable and normal. To a camera it would be fragmented (or even off with a flash detector)
Also, with an IR block filter, it would also appear completely normal to the eye, but IR cameras (like the congestion charge ones) would see black/grey. (I know the chap who tested the kit!)
So, what area does the legislation cover?
legislation probably never took into account the wonderous technology that would be available in the future (cameras that could read number plates, they were struggleing to find BiB that could 
). Seems like a lot of expense and hassle to avoid CC or scameras though! You'd also have to know the exact spec of the cameras you were trying to defeat.
The techincal bods at headquarters can enhance cctv at night of faces 100s of yards away....so a selection of letters and numbers from a few yards away aren't a problem..
To be honest, I've never known of a camera activation in my county that has been unable to read the plate of the vehicle due to a 'spray' or 'non-reflective' plate etc..or the other money wasting ideas available on the internet.
To be honest, I've never known of a camera activation in my county that has been unable to read the plate of the vehicle due to a 'spray' or 'non-reflective' plate etc..or the other money wasting ideas available on the internet.
Does this help Bryan?
R.V. Display of Registration Marks Regs 2001.
reg 11
(2) A registration plate must not be treated in any other way which renders the characters of the registration mark less easily distinguishable to the eye or which would prevent or impair the making of a true photographic image of the plate through the medium of camera and film or any other device.
(3) A registration plate must not be fixed to a vehicle -
(a) by means of a screw, bolt or other fixing device of any type or colour,
(b) by the placing of a screw, bolt or other fixing device in any position, or
(c) in any other manner,
which has the effect of changing the appearance or legibility of any of the characters of the registration mark, which renders the characters of the registration mark less easily distinguishable to the eye or which prevents or impairs the making of a true photographic image of the plate through the medium of camera and film or any other device.
As I understand it the last change in the font size was principly to ensure that machine like APNR etc got a good match to records.
DVD
DVD
R.V. Display of Registration Marks Regs 2001.
reg 11
(2) A registration plate must not be treated in any other way which renders the characters of the registration mark less easily distinguishable to the eye or which would prevent or impair the making of a true photographic image of the plate through the medium of camera and film or any other device.
(3) A registration plate must not be fixed to a vehicle -
(a) by means of a screw, bolt or other fixing device of any type or colour,
(b) by the placing of a screw, bolt or other fixing device in any position, or
(c) in any other manner,
which has the effect of changing the appearance or legibility of any of the characters of the registration mark, which renders the characters of the registration mark less easily distinguishable to the eye or which prevents or impairs the making of a true photographic image of the plate through the medium of camera and film or any other device.
As I understand it the last change in the font size was principly to ensure that machine like APNR etc got a good match to records.
DVD
DVD
My sister had to sit with a Scamera unit as part of her Police training (she is a Civvy). They used photoshop, reversed the image colours, and got the index plate easily within a few seconds. Invisible spray and non-showing number plates for 50 credits from ebay worked as well as a Chocolate Teapot.
mcflurry said:
My sister had to sit with a Scamera unit as part of her Police training (she is a Civvy). They used photoshop, reversed the image colours, and got the index plate easily within a few seconds. Invisible spray and non-showing number plates for 50 credits from ebay worked as well as a Chocolate Teapot.
Are the cameras bods, in their desire to fine someone, permitted to manipulate an image?
lunarscope said:
Yes, but the manipulated (or zoomed) image cannot then be used in evidence.
The only image allowed in evidence is an exact copy of that produced by the photographing device.
Not strictly true - any modified digital image may be allowable as evidence provided an unaltered copy is available and a full audit trail recorded which would allow anyone with the same software to produce exactly the same image. If you're feeling suitable bored there is a PDF of the 'digital imaging protocol' on the PSDB (Police science bods) website.
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