Motion capture

The Mocap Studio in the Lab facilitates a state-of-the-art motion capture system based on optical markers and used to record 3D motion with high accuracy. This is often used by researchers studying body language and gestures but also movements of objects and humans in a much broader sense. The system  exports 3D datasets in many formats and in six degrees of freedom (6 DOF). One option is to export a full body tracking as an fbx file for direct animation of avatars in VR via game engines like Unity3D or Unreal. Videos rendered with synchronised data overlay is another option. Likewise, velocity, acceleration and angles of tracked markers or objects can be exported for further processing.

The current setup consists of two different, but fully integrated systems, from Qualisys. The main and more permanent system consists of eight high-speed infrared Qualisys cameras (5+), one video camera (210c) and one recording computer. The second system consists of four Miqus M3 mocap cameras and two Miqus color video cameras. The Miqus cameras are smaller and easier to move around, which can be very helpful in the studio, but also makes it possible to do field recordings. 

The person being recorded puts special markers on strategic places of the body. Once calibrated, the mocap system can recognize the 3D-position of each marker.  The system is able to record movements at a very high speed. The video camera is synchronized with the mocap cameras so the resulting video can have a overlay of the markers. The software used is Qualisys Track Manager (QTM) for recording and some post processing. Full body animations can be streamed or exported (FBX) and directly applied to virtual characters (avatars) used in game engines like Unity3D and Unreal. Several other export formats enable analysis and post processing in Python, R, Matlab, Blender,  MotionBuilder,   Visual 3D and others.

Contact: mocaphumlab.luse

Guidelines for using the MoCap-studio during covid-19

Before entering the studio make sure to wash your hands or use hand desinfectant. Face masks, gloves and a visir can be used if you need to.

Clean the keyboard, mouse and table with disinfectant after recording. Note: Turn off the computer before cleaning.
Clean the calibration kit (both wand and L-cross) with disinfectant after recording.

We recommend that the subject of the recording apply the markers on their own.
After the recording remove the markers and the tape from each marker. Place the markers in the bowl at the marker table. Apply disinfectant to the markers and rotatet them in the bowl for a few seconds. Then put them on a paper on the table to dry. It takes at least 30 minutes before they can be used again.

If it is necessary to move the cameras, make sure to clean the poles, tripods and camera mounts with disinfectant after the recording. However, NEVER put disinfectant on any of the cameras.

Page Manager: Maja.Peterssonhumlab.luse | 2022-03-29