Method and fingerprint sensing system for forming a fingerprint representation
AssigneeFingerprint Cards AB
InventorsSebastian Weber, Hans Thörnblom
Life of this patent
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Abstract
The present invention generally relates to a method for forming a fingerprint using a fingerprint sensing system, and specifically to the possibility of allowing the formation of a fingerprint when only separated portions of the fingerprint is available. The invention also relates to the corresponding fingerprint sensing system and to a computer program product.
Claims20
A method of forming a fingerprint representation of a fingerprint pattern of a finger captured using a fingerprint sensor, the method comprising the steps of:
- acquiring a first partial image of a corresponding first portion of a fingerprint pattern using the fingerprint sensor;
- extracting a first fingerprint feature from the first partial image;
- acquiring a second partial image of a corresponding second portion of the fingerprint pattern using the fingerprint sensor, the second partial image being non-overlapping with the first partial image;
- extracting a second fingerprint feature from the second partial image;
- determining a first parameter for each of the first and the second fingerprint feature, the first parameter being at least one of a representation of a relative spatial fingerprint position for the respective fingerprint feature and a representation of a relation of the fingerprint feature to the finger;
- and
- forming the fingerprint representation by correlating the first parameter for the first fingerprint feature with the first parameter for the second fingerprint feature, wherein the fingerprint representation comprises an incomplete fingerprint image.
A fingerprint sensing system, comprising:
- a fingerprint sensor;
- a memory;
- and
- processing circuitry for forming a fingerprint representation of a fingerprint pattern of a finger captured using the fingerprint sensor, the processing circuitry connected to the fingerprint sensor and further configured for:
- acquiring a first partial image of a corresponding first portion of a fingerprint pattern using the fingerprint sensor;
- extracting a first fingerprint feature from the first partial image;
- acquiring a second partial image of a corresponding second portion of the fingerprint pattern using the fingerprint sensor, the second partial image being non-overlapping with the first partial image;
- extracting a second fingerprint feature from the second partial image;
- determining a first parameter for each of the first and the second fingerprint feature, the first parameter being at least one of a representation of a relative spatial fingerprint position for the respective fingerprint feature and a representation of a relation of the fingerprint feature to the finger;
- and
- forming the fingerprint representation by correlating the first parameter for the first fingerprint feature with the first parameter for the second fingerprint feature, wherein the fingerprint representation comprises an incomplete fingerprint image.
A computer program product comprising a non-transitory computer readable medium having stored thereon computer program means for controlling a portable electronic device, the portable electronic device comprising a fingerprint sensing system including a fingerprint sensor and processing circuitry, the fingerprint sensing system adapted for forming a fingerprint representation of a fingerprint pattern of a finger captured when swiped over the fingerprint sensor, wherein the computer program product comprises:
- code for acquiring a first partial image of a corresponding first portion of a fingerprint pattern using the fingerprint sensor;
- code for extracting a first fingerprint feature from the first partial image;
- code for acquiring a second partial image of a corresponding second portion of the fingerprint pattern using the fingerprint sensor, the second partial image being non-overlapping with the first partial image;
- code for extracting a second fingerprint feature from the second partial image;
- code for determining a first parameter for each of the first and the second fingerprint feature, the first parameter being a representation of a relative spatial fingerprint position for the respective fingerprint feature and a representation of a relation of the fingerprint feature to the finger;
- and
- code for forming the fingerprint representation by correlating the first parameter for the first fingerprint feature with the first parameter for the second fingerprint feature, wherein the fingerprint representation comprises an incomplete fingerprint image.
Dependencies are inferred from the claim text.