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Systems and methods for detecting blood alcohol level

  • US 9,002,067 B2
  • Filed: 03/28/2013
  • Issued: 04/07/2015
  • Est. Priority Date: 03/28/2013
  • Status: Active Grant
First Claim
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1. A system for detecting a blood alcohol level, the system comprising:

  • a receiver configurable to receive an input video of an eye of a user;

    a processor configurable to;

    stabilize the input video, the stabilizing including;

    detecting an eye area in the input video;

    creating a mask to mask the eye area in a plurality of frames of the input video, thereby separating the input video into a masked portion and an unmasked portion;

    using the unmasked portion of the input video to stabilize the input video and to detect a shaking movement of the receiver; and

    applying the shaking movement to the mask;

    analyze the input video, the analysis including identifying a pupil of the user in the mask;

    based on the analysis, detect a horizontal gaze nystagmus level, the detection including;

    estimating a velocity of the pupil between the plurality of frames of the input video;

    based on the estimation, identifying one or more shifts in the velocity; and

    based on the one or more shifts, determining the horizontal gaze nystagmus level according to a lookup table;

    based on the horizontal gaze nystagmus level, determine an equivalent blood alcohol level of the user; and

    an interface to output data associated with the equivalent blood alcohol level.

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