iPi Biomech Add-on

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Note: This article is under construction and will be published in a few days. Meanwhile refer to v2 documentation: http://wiki.ipisoft.com/Biomechanical_Analysis

Introduction

iPi Biomech Add-on is a convenient tool for in-depth biomechanical analysis of human motions. It includes visualization of tracking data and its export to various formats. It can be used for:

  • Export of point cloud from multiple Kinect sensors for animation or research
  • Gait analysis and rehabilitation
  • Sports motion analysis
  • Research in 3D human kinematics

Markerless tracking technology does not require clumsy suits, and work in real-life environments like regular office.

With iPi Biomech Add-on you can:

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  • Export point clouds obtained from depth sensors to file
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Note: iPi Biomech Add-on requires separate license key, which you need to activate in addition to iPi Mocap Studio license key. 30-days free trial provided.

Glossary

Linear quantities
Quantities derived from linear coordinate of the joint which connects bone to it's parent bone, including:
  • Coordinate
  • Velocity
  • Acceleration
Angular quantities
Quantities derived from bones's Euler angle, including:
Linear coordinate system
Coordinate system used for linear quantities, can be:
  • Absolute (relative to ground)
    • Axes are shown by selecting Move tool;
    • Y axis is vertical
    • XZ plane is floor
    • Center and X, Z axes directions are automatically set during calibration
    • Recenter Coordinates on Character button on Scene tab before tracking will align coordinate system with actor in T-pose
      • Y is vertical axis passing through center of mass
      • XZ plane is floor
      • X is directed along left arm in T-pose
  • Relative to center of mass
    • Axes directions are the same as Absolute coordinate system described above;
    • Center is in the actor model's center of mass
  • Relative to parent joint
    • Axes directions are the same as Absolute coordinate system described above;
    • Center coincides with the coordinates of the parent joint
Angular coordinate system
Coordinate system used for angular quantities, can be:
  • Absolute (relative to ground) — in this system rotations are defined relative to ground
  • Local (Relative to parent bone) — in this system rotations are defined relative to the parent bone
Euler angles system
Set of rotations which defines Euler angles, see here
Unit
Measurement unit of physical quantity