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Method and apparatus for speed or velocity estimation using optical sensor

  • US 10,302,669 B2
  • Filed: 09/15/2016
  • Issued: 05/28/2019
  • Est. Priority Date: 11/01/2013
  • Status: Active Grant
First Claim
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1. A method for navigating with a portable device comprising:

  • processing a sequence of samples from an optical sensor of the portable device, wherein processing the sequence of samples from the optical sensor comprises performing an optical flow analysis and wherein the portable device and the optical sensor may assume varying orientations with respect to a user depending at least in part on how the portable device is being used;

    determining usage of the portable device based at least in part on the processed sequence of samples; and

    estimating a speed for the portable device based at least in part on the processed sequence of samples and the determined usage, wherein one or more techniques for estimating speed are selected from multiple techniques based on the determined usage.

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