Hand pointing estimation for human computer interaction

  • US 9,372,546 B2
  • Filed: 09/03/2015
  • Issued: 06/21/2016
  • Est. Priority Date: 08/12/2011
  • Status: Active Grant
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First Claim
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1. A method for determining a finger pointing target, comprising:

  • receiving a plurality of images comprising a sequence of images over time, including images acquired from different perspectives representing a hand having a finger with a finger pointing direction;

    tracking a plurality of landmarks on the hand comprising at least two visible landmarks of the finger having the finger pointing direction, a center of the hand, and a position of a wrist proximate to the hand, in a series of images, the respective landmarks being derived from common characteristics of hands from a plurality of different people;

    determining a best fit for visible landmarks of the hand in each of the series of images to an active appearance model;

    inferring a three dimensional position of each visible landmark in the series of images;

    determining the finger pointing directional vector of the finger based on the inferred three dimensional position of each visible landmark in the series of images; and

    determining a finger pointing gesture based on at least a change in the determined directional vector over time.

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