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US 9,070,019 B2Granted
Systems and methods for capturing motion in three-dimensional space
AssigneeLeap Motion, Inc.
InventorDavid Holz
Life of this patent
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Abstract
Methods and systems for capturing motion and/or determining the shapes and positions of one or more objects in 3D space utilize cross-sections thereof. In various embodiments, images of the cross-sections are captured using a camera based on reflections therefrom or shadows cast thereby.
Claims10
A method of locating a control object appendage in three dimensional (3D) space, including:
- recording images of a control object appendage in 3D space using at least two geometrically distinct predetermined vantages;
- calculating by a processor four co-planar tangents to observed edges of the control object appendage from the recorded images;
- fitting an ellipse by a processor to the cross-section of the control object appendage by selecting the ellipse from a family of ellipses that fit the four co-planar tangents using an assumed parameter;
- repeatedly fitting contiguous cross-sections to the control object appendage;
- and
- constructing the control object appendage in 3D space from the contiguous cross-sections.
3 more elements
Dependencies are inferred from the claim text.