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Movement Analysis With CODA - Overview

Codamotion Active TechnologyMotion Analysis Applications

Codamotion’s measurement technology uses miniature infra-red ‘active’ markers, each with their own unique identity, to track the key positions on any subject. Signals from these ‘active’ markers are beamed to three linear arrays inside a ‘CODA’ unit which provides an immediate and precise 3D measurement.

What is a ‘CODA’ Unit?

A ‘CODA’ is a standalone measurement unit capable of tracking 3D marker positions in real time.

  • Each CODA makes its own independent measurements, dramatically reducing occlusion rates compared to multi-camera systems
  • Each CODA is factory calibrated, so there is no need for calibration by the user… ever
  • Each CODA weighs just 5kg, and can be unpacked and operational anywhere in less than ten minutes
  • Multiple CODAs can be easily aligned as a single framework to extend the measurement volume covered.
What is an ‘Active’ Marker?

‘Active’ markers are those which generate their own light. They flash as opposed to reflect.

  • Active Marker identity is automatic and totally secure, so marker labels cannot be misidentified
  • Active Markers require no post-collection label sorting
  • Active Marker systems require no pre-filtering, idealization or manipulation of collected data, which – in ‘passive’ marker systems – can dramatically reduce the effective frame rate and the ability to capture fine movements
  • Active Markers make ‘real-time’ capture and display possible
What is a Masked Linear Array?

A Masked Linear Array (MLA) measures the pattern produced when a marker casts a shadow on an array through a grid of lines (the mask). Sports Science Applications

  • The MLA provides higher accuracy by measuring patterns of illumination across its whole array surface, not just the minute fraction used when a focused dot falls on a 2D camera array
  • The MLA doesn’t suffer from non-linear distortions caused by camera lenses
  • The MLA is more tolerant of ambient light, so experiments aren’t confined to a dimly-lit laboratory
  • The MLA has an acceptance angle of over 75 degrees, allowing more measurement volume in less space, with sensor units placed closer to the action for added accuracy.

 

Want to know more?

For more information, call us on +44 116 2301060 or use our direct enquiry service.