Harris Corporation

Authentec, Inc.

Mark E Boss

Dale R Setlak

John C Schmitt

Mark Donald Rahmes

Joseph M Nemethy

Ellery Y Chan

A method and system are disclosed for creating three-dimensional models in a graphics texture mapping system and are especially useful for creating three-dimensional urban models. A computer includes a graphics application program and an application programming interface. A single rectangular, composite building texture map is formed for each of a plurality of three-dimensional objects corresponding to individual buildings and have a reduced area of pixels within each composite building texture map as caused by rotating individual images. A site model clip map image contains each composite building texture map in a spatially correct position that has been expanded such that no overlap remains.

Texture mapping system used for creating three-dimensional urban models

A method for indexing and searching a plurality of reference fingerprints to determine if a sample fingerprint matches one of the reference fingerprints includes the steps of: determining respective index values for the reference fingerprints and the sample fingerprint based upon characteristics of the fingerprints and with the index values being generally evenly distributed and continuous over a relatively large population of individuals; selecting a first subset of the reference fingerprints having index values in a first range relative to the index value of the sample fingerprint; and comparing the sample fingerprint to each fingerprint of the first subset of reference fingerprints to thereby determine if there is a match between the sample fingerprint and one of the reference fingerprints and without comparing the sample fingerprint to all of the reference fingerprints. The step of determining index values for the reference fingerprints and the sample fingerprint preferably comprises determining same based upon ridge flow curvature of the fingerprints. The step of selecting the first subset of reference fingerprints preferably comprises selecting same based upon an expected confidence value for locating the sample fingerprint in the first subset. Apparatus aspects of the invention are also disclosed.

Methods and related apparatus for fingerprint indexing and searching

Method and related apparatus for fingerprint indexing and searching

An apparatus for indexing and searching a plurality of reference fingerprints to determine if a sample fingerprint matches one of the reference fingerprints includes a device for: determining respective index values for the reference fingerprints and the sample fingerprint based upon characteristics of the fingerprints and with the index values being generally evenly distributed and continuous over a relatively large population of individuals; selecting a first subset of the reference fingerprints having index values in a first range relative to the index value of the sample fingerprint; and comparing the sample fingerprint to each fingerprint of the first subset of reference fingerprints to thereby determine if there is a match between the sample fingerprint and one of the reference fingerprints and without comparing the sample fingerprint to all of the reference fingerprints. The device for determining index values for the reference fingerprints and the sample fingerprint preferably includes a device for determining same based upon ridge flow curvature of the fingerprints. The device for selecting the first subset of reference fingerprints preferably includes a device for selecting same based upon an expected confidence value for locating the sample fingerprint in the first subset.

Apparatus for fingerprint indexing and searching

Method for fingerprint indexing and searching

Growing community of inventors

West Melbourne, FL, United States of America

Mark E Boss