IDENTIFIER INVESTIGATION

摘要

A method of extracting data from a representation of an identifier, such as a fingerprint is provided. The method includes selecting a plurality of features, such as ridge ends or bifurcations, in the representation of an identifier, considering the positions of those features and generating a reference feature, such as a centre, from the positions of the plurality of features. The method then links one or more of the features to the reference feature and/or links one or more of the features to one or more of the other features in the plurality of features. From the result, the method extracts data including information on one or more of: one or more of the plurality of features; the reference feature; one or more of the links between a feature and the reference feature; one or more of the links between a feature and another feature.

主权项

1. A method of extracting data from a representation of an identifier, the method comprising:
a) capturing from a crime scene or from an item or from a location or from a person, a data representation of an identifier from a physical representation of said identifier;the method further comprising the computer implemented steps of:
b) selecting a plurality of features in the data representation of said identifier, each of the plurality of features having a position; c) considering the positions of the plurality of features; d) then after step c), generating a reference feature having a reference feature position from the positions of the plurality of features, the reference feature position being different from each of the positions of the plurality of features and wherein the reference feature is generated by calculating a mean of the positions of the plurality of features considered; e) then after step d), linking all of the plurality of features to the reference feature and linking one or more of the plurality of features to one or more of the other features in the plurality of features by links to provide a further data representation of said identifier; and f) extracting data from the further data representation of said identifier, the extracted data comprising information on all of: one or more of the plurality of features, wherein a feature has a type and the information on one or more of the plurality of features includes information on the type of feature, and wherein a feature has a direction and the information on one or more of the plurality of features includes information on the direction of the feature; the reference feature; one or more of the links between a feature and the reference feature, wherein one or more of the links between a feature and the reference feature has a distance and the information on one or more of the links between a feature and the reference feature includes information on the distance between the feature and reference feature; one or more of the links between a feature and another feature, wherein one or more of the links between a feature and the another feature has a distance and the information on one or more of the links between a feature and another feature includes information on the distance between the feature and another feature.