• Present the computational tools necessary for the calculation of 3D kinematics
• Discuss how 3D data are collected
• Determine how these data are used to evaluate positions and orientations of the body or body segments in space

Carefully read the sections on:

• Collection of three-dimensional data
• Coordinate systems
• Marker systems

COLLECTION OF 3D DATA

Direct Linear Transformation (DLT)

Requirements for utilizing DLT

• At least 6 non-coplanar control points must be used in the calibration
• At least 2 cameras must see all the control points
• At least 2 cameras must see each point of interest

Coordinate Systems

Marker Systems

• Each segment needs at least 3 non-collinear points for its position to be completely described
• Mounted on bone pins
• Skin-mounted markers
• Arrays of markers

Mini-Project #2