A summary of knowledge about image capture principles
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1, the principle of illegal TV capture
There are two ways. One is to bury the induction coil underground, a digital camera is set up on the crossbar to capture the red light, and the other is to set up the camera for real-time video recording of speeding, red light, and illegal parking. Either way, at least three pictures will be taken of the illegal vehicles. One is a momentary illegal picture, one is a number plate identification picture, and the other is a panoramic picture. Either way, the camera is turned on for 24 hours, and the image retention time is usually one week. 
2, illegal processing
The command center receives the picture and compares the license plate number information with the vehicle management information, so as to retrieve the comprehensive information of the vehicle, such as the owner, vehicle model, color, etc., and then the website of the information processing personnel so that the owner of the violation vehicle can inquire. .
3, information loss problem
Not all illegal vehicles can be photographed. Only when the license plate image is clear, the information entry personnel can enter the illegal vehicle into the database for processing.
4, shooting range
A camera usually takes only one lane, and a few can take two lanes. It is usually located in the first and second lanes counting from left to right. The digital camera has a wide shooting range, so most of the lanes in the city can be photographed in the same direction. 
5, how to avoid being snapped <br> <br> first, and most secure, is not illegal.
Second, pay attention to the road conditions, and see the front of the crossbar as if it is a (phase) machine. Do not go.
Third, not the recommended way, take the right-most lane (not with a digital camera in front).
Fourth, when you feel wrong, the website checks, if there is no notice within a week, the information is not processed, and you are OK.
After reading it, I still advise all riders to be safe. Whether it is your own or someone else's. Ning waited 3 minutes without grabbing 1 second 
The electronic eye works
1. The electronic eye uses a sensing line to sense the pressure from the car on the road. The signal is collected by the sensor to the X processor, and the register is temporarily stored (the data is valid during a red light cycle);
2. In the same time interval (in the red light period), if two pulse signals are generated at the same time, it is regarded as “effectiveâ€. Simply put, if the red light is at that time, your front wheel is over the line, and then the wheel If there is no pressure line, only one pulse will be generated. If there is no continuous two pulses, no picture will be taken.
3. In some cases, some people drove past the front wheel and feared being photographed. Then he dropped the car back to the line and the result was still taken. What is the reason? It's because the "one pair" pulse signal has been generated one after the other (this pair of pulses was generated in the same red light cycle). I was ordered this way n times.
4, when the yellow light, the camera system delay 2s start; red light, the system has been started; green light will be on, 2s in advance to shut down the system, mainly to prevent accidental shooting. So many taxi drivers know that it's almost enough to go, and that's fine. However, it is recommended that you do not do this because timing is more difficult to grasp.
Post-processing: After the image is downloaded and transmitted to the command center, the image needs to be registered, numbered, announced, and then transmitted to the central computer database for use by various authorities.