| Patent Number |
Title Of Patent |
Date Issued |
| 6546122 |
Method for combining fingerprint templates representing various sensed areas of a fingerprint to |
April 8, 2003 |
| A method for combining two templates. A first template having a first minutia set and a second template having a second minutia set are provided. The first template is compared with the second template to obtain a matching minutia set. Registration parameters are calculated from the |
| 6538456 |
Capacitive fingerprint sensor with adjustable gain |
March 25, 2003 |
| The present invention relates to a fingerprint sensing device comprising a planar array of closely-spaced capacitive sense elements. When a finger is placed in close proximity to the sensing device, the capacitive sense elements measure a capacitance between the finger and a single capac |
| 6535622 |
Method for imaging fingerprints and concealing latent fingerprints |
March 18, 2003 |
| A method of operating a personal verification system includes acquiring with a sensor a first image of a first biometric feature, removing background noise associated with the sensor from the image, and storing at least a portion of the first image. The method also includes acquiring |
| 6518560 |
Automatic gain amplifier for biometric sensor device |
February 11, 2003 |
| An automatic gain amplifier is disclosed that dynamically improves the quality of scanned biometric information. According to one embodiment, an image distribution of the scanned biometric is generated. Next, areas of higher image distribution are identified. An iterative process of |
| 6330345 |
Automatic adjustment processing for sensor devices |
December 11, 2001 |
| A system and method for automatically determining a set of default settings (with respect to a blank image) so that a uniform and high contrast image results when, for example, a finger is present on a sensor device. A background noise image and other diagnostic data, such as non-functio |
| 6049620 |
Capacitive fingerprint sensor with adjustable gain |
April 11, 2000 |
| The present invention relates to a fingerprint sensing device comprising a planar array of closely-spaced capacitive sense elements. When a finger is placed in close proximity to the sensing device, the capacitive sense elements measure a capacitance between the finger and a single capac |
| 6016355 |
Capacitive fingerprint acquisition sensor |
January 18, 2000 |
| An apparatus for detecting topographic variations on an object such as a finger includes an array of sensing elements disposed on a substrate which each have a parasitic capacitance. An insulating receiving surface is disposed over the array of sensing elements and is adapted to receive |
| 5991408 |
Identification and security using biometric measurements |
November 23, 1999 |
| The present invention makes it possible for a user to have a security key created from one or more biometric elements of the user, such as a fingerprint. For example, a biometric feature or combination of biometric features of the user can be used to create an instance of a problem which |
