초록 ▼

A method and system to detect and identify a target vehicle displaying a switched or invalid license plate includes a license plate reader to read the plate number carried by a target vehicle in its area. A pair of spaced laser beams measures the speed and length of the traveling vehicle. The read l

A method and system to detect and identify a target vehicle displaying a switched or invalid license plate includes a license plate reader to read the plate number carried by a target vehicle in its area. A pair of spaced laser beams measures the speed and length of the traveling vehicle. The read license plate numbers are compared with a data base of registered vehicles to obtain the length of the vehicle registered for that plate. If the registered length differs from the measured length, the plate may be illegally on the target vehicle.

대표청구항 ▼

The method of detecting vehicles displaying incorrect license plates, including the steps of: (a) using a camera to form an image of a license plate of a target vehicle which is within area of the camera; (b) converting the image into digital data representing the number of the license plate; (c) me

The method of detecting vehicles displaying incorrect license plates, including the steps of: (a) using a camera to form an image of a license plate of a target vehicle which is within area of the camera; (b) converting the image into digital data representing the number of the license plate; (c) measuring a physical characteristic of the target vehicle; (d) deriving from a data base of license plate numbers a physical characteristic based on the license plate number read from the target vehicle; (e) comparing the measured physical characteristic with the physical characteristic derived from the data base and in the event of a mismatch generating a warning signal.