Systems and methods for capturing motion in three-dimensional space

摘要

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.

主权项

1. 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.