Fake finger discrimination device and method
AssigneeEgis Technology Inc.
InventorsYuan-Lin Chiang, Jung-Chien Lee
Life of this patent
Estimating the term…
Abstract
A fake finger discrimination device includes a fingerprint sensor and a control processor. The fingerprint sensor senses a rotating finger to obtain fingerprints in a fake finger discrimination mode. The control processor electrically connected to the fingerprint sensor, judges whether the fingerprints match with one another by way of rotation correlation comparison. If the fingerprints match with one another, the finger is determined as true. If the fingerprints do not match with one another, the finger is determined as fake. A fake finger discrimination method is also disclosed.
Claims18
A fake finger discrimination device, comprising:
- a fingerprint sensor sensing a rotating finger to obtain fingerprints with different rotating angles of the rotating finger in a fake finger discrimination mode through a single rotation of the rotating finger clockwise and/or anticlockwise without the rotating finger separating from the fingerprint sensor;
- and
- a control processor electrically connected to the fingerprint sensor to judge whether one of the fingerprints of the single rotation matches another fingerprint by way of rotation correlation comparison, wherein the rotation correlation comparison is to compare the fingerprints with different rotating angles of the rotating finger;
- wherein if one of the fingerprints matches another fingerprint by way of the rotation correlation comparison, the finger is determined to be true, otherwise the finger is determined to be fake.
A fake fingerprint discrimination method applicable to a fake fingerprint discrimination device comprising a fingerprint sensor and a control processor, the method comprising steps as follows:
- sensing a rotating finger with different rotating angles of the rotating finger in a fake fingerprint discrimination mode to obtain fingerprints by the fingerprint sensor through a single rotation of the rotating finger clockwise and/or anticlockwise without the rotating finger separating from the fingerprint sensor;
- and
- judging whether one of the fingerprints of the single rotation matches another fingerprint by way of rotation correlation comparison by the control processor;
- wherein the rotation correlation comparison is to compare the fingerprints with different rotating angles of the rotating finger;
- wherein if one of the fingerprints matches another fingerprint by way of the rotation correlation comparison, the finger is determined to be true, otherwise the finger is determined to be fake.
Dependencies are inferred from the claim text.