Efficient and fault tolerant license plate matching method

摘要

A method and system for identifying a matching license plate. A pair of full or partial plate numbers to be matched can be received. The pair includes a target plate made up of a first set of characters and a suspect plate made up of a second set of characters. A set of number-order preserved sub-plates can be generated by adding and subtracting a single character from the second set of characters. Utilizing a site specific license plate matching table (P-table), a matching score between each of the sub-plates and the target plate may be calculated as part of a string correlation calculation. A maximum value for each of the sub-plate matching scores can then be calculated. The maximum value can be normalized to a 0˜100 scale and used as a final matching score. When the final matching score exceeds a predetermined threshold, an alert may be issued.

主权项

1. A method for identifying a matching license plate, said method comprising:
identifying a target plate comprising a first set of characters and a candidate plate comprising a second set of characters; generating a set of sub-plates by adding or subtracting at least one character from the second set of characters; computing a matching score between said candidate plate and said target plate; computing a matching score between each of said sub-plates and said target plate; and computing a maximum for each of said matching scores in order to thereafter normalize said maximum to obtain a final matching score for each of said matching scores.