Biomechanics using Visual3D

  • Fully integrated with the most advanced 3D biomechanical toolbox
  • Research validated calculations
  • Real-time streaming from QTM


  • Save time with automatically identified markers
  • Easily identify markers regardless of marker set
  • Define your own AIM Models

Portable system

  • A single cable (daisy-chained)
  • A single computer
  • Easy to set up and move around!

Site license

  • Unlimited number of QTM-installations at your department
  • No dongle required
  • Give your students time-limited access

A real challenge

Capturing a swimmer’s motion and biomechanics underwater is not an easy task. When a swimmer jumps in, thousands of tiny bubbles create an explosion of reflective spheres – not unlike the markers meant to be tracked by the cameras.

Not only that, the water surface acts like a mirror, reflecting so much light its brightness easily gets treated like a wall of giant markers. These two phenonema are the greatest obstacles we face, making underwater motion capture a real challenge.

Active filtering

Luckily, Qualisys’ Underwater cameras house state-of-the-art hardware making underwater motion capture easier than ever. By taking Qualisys’ active filtering technology for outdoor motion capturing into the pool, underwater captures can be improved dramatically.

Active filtering is a hardware operation built into the  cameras which greatly reduces unwanted reflections. By using it underwater, reflections from bubbles and other objects are effectivly minimised.

Combining under and over-water

By merging together data from a land-based and an underwater system, a combined motion capture can be made. This is useful when you are interested in tracking both the dive-in and the swimming part.

High-speed video

Just like our land-based  cameras, the  Underwater cameras can also be equipped with high-speed video, turning them into perfect underwater recording devices.

Are you interested?

Get in touch with us and learn more.