Method and device for detecting fraudulent identification of a person
AssigneeIdemia Public Security France
InventorJean BEAUDET
Life of this patent
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Abstract
The method (60) for detecting fraudulent identification of a person by recognizing visible biometric features comprises: a step (61) of controlling a value of the amplification gain of the signal leaving an image sensor (46), a step (64) of measuring acquisition noise of at least one image of at least one part of the body of this person, said image being captured while implementing said amplification gain, a step (70) of checking consistency, by way of comparison, between the measured noise and the determined noise, and in the event of a lack of consistency, a step (71) of outputting a signal representative of this lack of consistency.
Claims12
A method for detecting fraudulent identification of a person by recognizing visible biometric features, the method comprising:
- controlling a value of an amplification gain of a signal leaving an image sensor,
- measuring acquisition noise of at least one image of at least one part of a body of the person captured while implementing said amplification gain,
- checking consistency between the measured noise and the controlled value of the amplification gain, and
- in an event of a lack of consistency, outputting a signal representative of the lack of consistency.
A device for detecting fraudulent identification of a person by recognizing visible biometric features, the device comprising:
- an image sensor,
- means for controlling a value of the amplification gain of a signal leaving the image sensor,
- means for acquiring the value of the amplification gain applied for each captured image,
- means for measuring acquisition noise of at least two images of at least one part of the body of the person, said images being captured while implementing at least two different amplification gains,
- means for checking consistency between the acquired gain values corresponding to said images and the measured noise values, and
- means for outputting a fraudulent identification alert, configured, in an event of a lack of consistency, to output a signal representative of the lack of consistency.
Dependencies are inferred from the claim text.