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Optical flow based tilt sensor

  • US 8,983,139 B2
  • Filed: 06/25/2012
  • Issued: 03/17/2015
  • Est. Priority Date: 01/07/2005
  • Status: Active Grant
First Claim
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1. A method comprising:

  • accessing images captured from an image sensor positioned on a device;

    identifying a first feature that is present in the images captured from the image sensor;

    identifying a second feature that is present in the images captured from the image sensor, the second feature being different than and spaced apart from the first feature; and

    determining a description of motion of the device in a depth direction based on changes in distance between the first feature and the second feature in the images captured from the image sensor, the depth direction being a direction of movement substantially toward or substantially away from the first feature and the second feature.

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