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:

iPi-Biomech-1-1.jpg
  • 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)
iPi-Biomech-1-2.png
    • 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 (feet or meter, etc.)

License and Trial

iPi Biomech Add-on requires separate license key, which you need to activate in addition to iPi Mocap Studio license key. You can order your license here, or activate 30-days free trial. Follow the steps below to start working with iPi Biomech Add-on

  1. Switch to Biomech tab.
  2. Press Activate button
  3. Press Start 30-days Free Trial Period or Enter Biomech License Key and follow further on-screen instructions
    iPi-Biomech-2-1.png
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Note: If you do not have iPi Mocap Studio license key, you can order it here or activate 30-days free trial. If your Studio trial has expired, you will not be able to export biomech data as well as animation. But you can still plot biomech data.