Fingerprint matching method and system
First Claim
1. A method of matching a query fingerprint to a plurality of file fingerprints, the method comprising the steps of:
- determining a plurality of partial features of each of the file fingerprints,for each partial feature, deriving a list of all file fingerprints which have said partial feature,determining a plurality of query partial features of the query fingerprint;
identifying file fingerprints comprising partial features that match said query partial features of said query fingerprint;
deriving a ranked list of the file fingerprints based on said identifying; and
performing a one-to-one matching of the query fingerprint only with file fingerprints comprising a pre-determined rank in said ranked list.
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Abstract
A method of matching a query fingerprint to a plurality of file fingerprints. The method comprises the steps of determining a plurality of partial features of each of the file fingerprints. For each partial feature, derive a list of all file fingerprints which have said partial feature as one of their partial features. Determine a plurality of query partial features of the query fingerprint, and derive a ranked list of the file fingerprints based on identifying the individual query partial features in the partial features of the respective file fingerprints. Then perform one-to-one matching of the query fingerprint with selected ones of the ranked list of the file fingerprints.
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Citations
21 Claims
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1. A method of matching a query fingerprint to a plurality of file fingerprints, the method comprising the steps of:
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determining a plurality of partial features of each of the file fingerprints, for each partial feature, deriving a list of all file fingerprints which have said partial feature, determining a plurality of query partial features of the query fingerprint; identifying file fingerprints comprising partial features that match said query partial features of said query fingerprint; deriving a ranked list of the file fingerprints based on said identifying; and performing a one-to-one matching of the query fingerprint only with file fingerprints comprising a pre-determined rank in said ranked list. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for matching a query fingerprint to a plurality of file fingerprints, the system comprising:
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a database having stored data therein providing a plurality of partial features of each of the file fingerprints and for each partial feature a list of all file fingerprints which have said partial feature; a processing unit for determining a plurality of query partial features of the query fingerprint, identifying file fingerprints comprising partial features that match said query partial features of said query fingerprint, and deriving ranked list of the file fingerprints based on said identifying; and a one-to-one fingerprint matching unit for performing one-to-one matching between the query fingerprint and only file fingerprints comprising a pre-determined rank in said ranked list. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A computer program, recorded on a medium, for instructing a computer to conduct a method of matching a query fingerprint to a plurality of file fingerprints, the method comprising the steps of:
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determining a plurality of partial features of each of the file fingerprints; for each partial feature, deriving a list of all file fingerprints which have said partial feature; determining a plurality of query partial features of the query fingerprint; identifying file fingerprints comprising partial features that match said query partial features of said query fingerprint; deriving a ranked list of the file fingerprints based on said identifying; and performing a one-to-one matching of the query fingerprint only with file fingerprints comprising a pre-determined rank in said ranked list. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification