How do traffic cameras focus speed of a plate to take a photo legible?
Live and work in China, which now use cameras to detect speed. This is very effective as the police here tend to do nothing, the devices automatically is the only way to catch drivers speeding poor who tend to drive at any speed. I was told that the plates have a focal point, what I see on my plate. This is a recessed dimple about a quarter inch in diameter and appears to be a different alloy, but may be my imagination. It is not painted for some reason, and most are rusty. There are definitely some reason for the dimple and that is not painted. Many people here completely paint over the entire plate to hide the camera's white numbers. I'm not sure if it works, but local police did not seem concerned by the fact that 30% of cars have number plates hidden. Just curious how these focus cameras and the technology is related to the notch in the plate.
<> The cameras are pre-positioned to optimize image of the car. High speed digital cameras make it easy to identify the speed reducer. No need to focus on a particular object. Sensors on the trip way to the cameras when a vehicle passes. Here is a description of a particular system:
Beverly’s Painted Plate
