Efficient and fault tolerant license plate matching method
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United States of America Patent
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Aug 5, 2014
Grant Date -
Aug 22, 2013
app pub date -
Feb 21, 2012
filing date -
Feb 21, 2012
priority date (Note) -
In Force
status (Latency Note)
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Abstract
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.
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