Pedestrian navigation apparatus and method
First Claim
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1. Method of determining motion of a pedestrian, comprising:
- determining at least one position of at least each foot or lower leg portion of each leg of the pedestrian,projecting said positions on at least one plane, whereby the projected positions express a distance between said feet or lower legportions along said at least one plane,detecting a situation in which said pedestrian has completed a step, andderiving the motion from the positions projected on said at least one plane for a situation where said pedestrian has completed the step, thereby obtaining a step length, or extent of displacement, along said at least one plane.
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Abstract
The motion of a pedestrian is evaluated by determining at least one position of at least one identified portion of the pedestrian, projecting the positions(s) on at least one plane, and deriving the motion from the position(s) projected on the at least one plane. Typically the position(s) are determined in three-dimensions, e.g. of the feet. It is possible to project on two different planes to provide three-dimensional navigation information.
49 Citations
39 Claims
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1. Method of determining motion of a pedestrian, comprising:
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determining at least one position of at least each foot or lower leg portion of each leg of the pedestrian, projecting said positions on at least one plane, whereby the projected positions express a distance between said feet or lower legportions along said at least one plane, detecting a situation in which said pedestrian has completed a step, and deriving the motion from the positions projected on said at least one plane for a situation where said pedestrian has completed the step, thereby obtaining a step length, or extent of displacement, along said at least one plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. Method of determining the motion of a pedestrian, comprising:
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detecting a situation where said pedestrian has completed a step, determining a relative separation between each foot or lower leg portion of the pedestrian, and deriving from said relative separation a projection on at least one plane over which said pedestrian evolves or over a plane having a component along a direction over which said pedestrian evolves, the projection expressing a distance between said feet or lower leg portions of said pedestrian when the pedestrian has completed the step to obtain a step length along the at least one plane.
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34. Apparatus for determining motion of a pedestrian, comprising:
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means for determining at least one position of at least each foot or lower leg portion of each leg of the pedestrian, means for projecting said positions on at least one plane whereby the projected positions express a distance between said feet or lower leg portions along said at least one plane, means for detecting a situation in which said pedestrian has completed a step, and means for deriving the motion from the positions projected on said at least one plane for a situation where said pedestrian has completed the step, thereby obtaining a step length, or extent of displacement, along said at least one plane. - View Dependent Claims (35, 36, 37, 38)
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39. Apparatus for determining the motion of a pedestrian, comprising:
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means for detecting a situation where said pedestrian has completed a step, means for determining a relative separation between each foot or lower leg portion of each leg of the pedestrian, and means for deriving from said relative separation a projection on at least one plane over which said pedestrian evolves or having a component along a direction over which said pedestrian evolves, the projection expressing a distance between said feet or lower leg portions when said pedestrian has completed the step to obtain a step length along the at least one plane.
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Specification