Complete License Plate Recognition Systems
There are several applications where automatic license plate recognition can be used.
The term "Complete License Plate Recognition System" does not have a definite meaning out of the context of the specific application.
As the vehicle arrives the inductive loop senses its arrival and gives a signal to the control PC meaning: "car arrived".
This signal is processed and understood by the access control application.
The access control application - via driving a frame grabber card - captures the video signal of the camera and creates a digital picture about the vehicle in the memory (RAM) of the control PC.
Having the digitised picture of the arrived vehicle in RAM, the access control application requests the license plate reader module to analyse the digitised picture and read the license plate number of the vehicle. After reading the license plate number the LPR module returns the read plate number in ASCII to the access control application.
The access control application takes the license number in ASCII and passes it to a database module.
The database module checks the plate number against different lists of permissions, etc. and returns an "access permitted" or an "access denied" flag.
Based on the flag the access control application opens the barrier and sets the traffic light to green - or not.
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