Efficient and fault tolerant license plate matching method
First Claim
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.
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0 Petitions
Accused Products
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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Citations
20 Claims
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1. A method for identifying a matching license plate, said method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A non-transitory computer-readable medium having computer-executable instructions for performing steps, said steps comprising:
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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. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A system for identifying a matching license plate, said system comprising:
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an image capture device; a central processing unit operably connected to a database; and a non-transitory computer-usable medium embodying computer code, said non-transitory computer-usable medium being coupled to said data bus, said computer program code comprising instructions executable by said processor and configured for; 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. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification