KINEMATICS & INERTIAL SUITS

The Problem With Inertial Motion Capture Suits

In addition to good electronics,  (sensor data) inertial suits need information on the geometry of the user's joints before they can provide accurate mocap data. 

Simply, if the elbow joint is off (image on the right), you will not be able to reach the coffee cup.

One Skeleton Size Doesn't Fit Everyone


So we provide tools for you to create a more accurate custom skeleton file for each user. We call it the 'Skeleton File'. It includes, Joint displacements (includes segment lengths) and Calibration Parameters (also user configured), as well as rate of motion 'Scaling' which counters tissue and clothing artefacts. Skeleton Files can be modified in post!

Making Accurate Skeleton Files:

 

                                                                                                                                                          Two Ways:


MAINSTREAM: Use our skeleton data extraction tool 'AutoCal' to make skeleton files. It uses a front and a side photo of the user (at 'Zero' posture), inside a cube with known dimensions and the SW provides a Drag & Drop feature to let you construct a kinematic skeleton.

 

BEST PRACTICE: Get a 3D scan of the user and our SynDash SW will let you make the most accurate of all skeleton files. This process of extracting the joint displacements of the use is a must in sports mocap.

NOTE: All Skeleton Files can be improved and

re-fused into motion data previously captured.

  • Vimeo

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