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Analysis of reflections of projected light in varying colors, brightness, patterns, and sequences for liveness detection in biometric systems

  • US 10,599,912 B2
  • Filed: 07/18/2017
  • Issued: 03/24/2020
  • Est. Priority Date: 12/23/2016
  • Status: Active Grant
First Claim
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1. A method of determining face liveness, comprising:

  • during both an enrollment phase and a face recognition phase;

    automatically detecting, by a mobile device, a level of light;

    displaying a captured image of a subject'"'"'s face on a screen;

    conducting a preliminary analysis of an eye of the subject'"'"'s face to determine whether there are any preexisting reflections in the eye;

    selecting a liveness detection image based upon whether a reflection of the image will be more or less readily detectable given one or more current environmental condition;

    causing, with a processor of the mobile device, the liveness detection image to be displayed on the screen of the mobile device during a first period of time, the displayed liveness detection image brightness adjusted based on the detected level of light;

    receiving, at the processor, a reflection image from a camera utilized by the mobile device, the reflection image captured during the first period of time and showing the subject'"'"'s face;

    displaying the captured image of a subject'"'"'s face or another captured image of the subject'"'"'s face on the screen;

    analyzing, with the processor, the reflection image to identify any reflections of the liveness detection image in the reflection image;

    making, with the processor, a liveness determination based on the analysis;

    selecting one captured image determined to be live; and

    storing the one captured image determined to be live; and

    normalizing the one captured image.

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