Principle

  • Light is emitted onto the touching object such that light is transmitted along a path just below a surface of the touching object.
  • A surface image of the touching object is captured by detecting that light emitted onto the touching object is outputted to an outside of the touching object after passing through an inside of the touching object.
  • The surface image of the touching object is analyzed and it is determined whether the fingerprint captured from the touching object is an authentic fingerprint or a forged fingerprint according to an analyzed result.

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