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System and method for contactless detection and recognition of gestures in a three-dimensional space

  • US 9,921,690 B2
  • Filed: 02/09/2011
  • Issued: 03/20/2018
  • Est. Priority Date: 02/10/2010
  • Status: Active Grant
First Claim
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1. A method for the contactless detection and recognition of gestures in a three-dimensional movement space, wherein the gesture comprises an unintentional movement, the method comprising the steps of:

  • generating an electrical near-field, which defines the three-dimensional movement space;

    moving an object in the three-dimensional movement space in a contactless fashion, wherein a movement of the object comprises an unintentional movement,detecting deformations of the electrical near-field caused by the movements of the object in the three-dimensional movement space by a plurality of sensors providing a plurality of sensor signals,generating from the detected deformations of the electrical near-field at least one movement path corresponding to the movement of the object in the three-dimensional movement space,during the generation of the movement path in the movement path determining a gesture start, wherein beginning with the gesture start the gesture is extracted from the movement path, wherein a gesture start is detected when one or more measured variables exceed one or more respective predefined thresholds,after detecting the gesture start, feeding the movement path starting at the gesture start and ending at a gesture end to a pattern recognition, wherein at least one segment of the movement path identified as an unintentional movement is replaced by an interpolation, wherein the unintentional movement is determined when the movement path exceeds a second predetermined threshold and wherein the interpolation is a cubic spline interpolation and starts at a start of the at least one segment and ends at an end of the at least one segment.

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