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Motion pattern classification and gesture recognition

  • US 10,209,778 B2
  • Filed: 08/17/2015
  • Issued: 02/19/2019
  • Est. Priority Date: 06/03/2011
  • Status: Active Grant
First Claim
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1. A method performed by a mobile device, comprising:

  • receiving, at the mobile device, a plurality of motion patterns, each of the motion patterns including a timed series of motion pattern vectors and being associated with a motion pattern time and a sphere of influence;

    receiving a plurality of motion sensor readings from a motion sensor of the mobile device, the motion sensor readings including a plurality of motion reading vectors, each motion reading vector corresponding to a motion reading time;

    selecting, using a time window and from the motion sensor readings, a time series of motion reading vectors;

    calculating a motion deviation distance between the selected time series of motion reading vectors and each of the motion patterns, including applying dynamic time warping based on the motion pattern times of the motion pattern and the motion reading times of the series of motion reading vectors;

    sliding the time window along a time dimension on the received motion sensor readings, and performing the selecting and calculating operations for each sliding time window until, according to a calculated motion deviation distance, the selected time series of motion reading vectors is located within the sphere of influence of a motion pattern, which is then designated as a matching motion pattern; and

    performing a specified task on the mobile device based on the matching motion pattern.

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