Re: UK traffic cameras without film

[Russell J Rosener <rrosener@xxxxxxxxxxxxxxxx>]

	It is my understanding that infrared film was adopted because
standard
film  using a flash photographed only the license plate. People beat
the the ticket by saying, "Oh sure, that's my car, but I was not driving
it at the time." The authorities decided that to make the violation stick
they needed a photo of the driver as well, but the danger of using a
normal flash to photograph a driver is obvious. The solution was to use a
nearly invisible red flash which would not blind the driver, but still get
a clear photo. Thus films like Ilford SFX200 were born.

Russ Rosener
 
On Mon, 17 Mar 1997,
Marcel Volkerts
wrote: > Hi, > > Maybe a beginners question, but why is IR film used for 
> traffic cameras? I thought ordinary color film was used, 
> at least in the Netherlands where I did some student 
> project a while ago where we tried to cut out the 
> license plates using fuzzy logic. 
> 
> Marcel
> 


------------------------------