Enabling identification of fingerprints from captured images using contour points
AssigneeFingerprint Cards AB
InventorMikkel B. STEGMANN
Life of this patent
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Abstract
The invention relates to a method performed by a fingerprint sensing system of enabling identification of a fingerprint in an image captured by a fingerprint sensor of the fingerprint sensing system, and a fingerprint sensing system performing the method.
Claims13
A method performed by a fingerprint sensing system of enabling identification of a fingerprint in an image captured by a fingerprint sensor of the fingerprint sensing system comprising:
- capturing at least one image of a fingerprint of a finger contacting the fingerprint sensor;
- detecting contour points of at least one ridge or valley of the fingerprint of the captured image;
- and
- projecting the contour points onto the medial axis of said at least one ridge or valley, thereby enabling forming said at least one ridge or valley from the contour points projected onto the medial axis to enable identification of a fingerprint.
A fingerprint sensing system comprising a fingerprint sensor and a processing unit, the fingerprint sensing system being configured to enable identification of a fingerprint in an image captured by the fingerprint sensor,
- the fingerprint sensor being configured to:
- capture at least one image of a fingerprint of a finger contacting the fingerprint sensor;
- the processing unit being configured to:
- detect contour points of at least one ridge or valley of the fingerprint of the captured image;
- project the contour points onto the medial axis of said at least one ridge or valley, thereby enabling forming said at least one ridge or valley from the points projected onto the medial axis to enable identification of a fingerprint.
Dependencies are inferred from the claim text.