How it works?

How it works?

Motion Mesurement is a term used in biomechanics to describe the collection and analysis of data from any type of motion in 2D and 3D. This information is obtained from video cameras, magnetic, mechanical and other kind of devices, and are processed to calculate linear and angular displacements, velocities, accelerations, etc.. and in general any kinematic parameter calculated based on the positions of specific points in space and in time.

 

 

A group of researchers from the University of Cordoba have developed an innovative 3D motion capture system based on video which we have called UCOTrack (formerly SOMCAM3D).

Results obtained by this system has been presented at important national and international conferences focused on the field of Rheumatology (EULAR SER) and Biomechanics (SIBB, ESMAC, ISB). Besides being used in the clinical setting has been used in the veterinary field, especially in horses. Also have used in sports performance studies.

 

  

 

 

System Description

Optical motion capture systems , are based on the placement of reflective markers at specific points of the subject to measure. The system produces three-dimensional spatial positions through reconstruction processes and computer vision techniques of images from several video cameras synchronized. From these positions can generate large amount of information kinematics (positions, angles, distances, etc..).

 

 

 

Facilities

For motion capture, digital cameras synchronized and connected to a central computer are used. The number of cameras may vary, depending on the test, between 2 to 8. These cameras are attached to laboratory roof or placed on tripods so that the wiring does not interfere with the subject movement to measure or system operators.

The positioning of these cameras is essential since they must cover the space where the subject moves so that the marks that are placed on it look from at least two of them. This causes the cameras must be separated from the subject at least about 3m.

As discussed above, UCOTRACK can work outdoors because it is a completely portable system. But in many cases it can be interesting to set up a permanent laboratory. Because of these requirements, the open area necessary for the laboratory is about 7m wide per 7m long and 2.5m high. These dimensions are ideal, although 6x5m space could be sufficient. In this work area must be added another space to placing the central computer where cameras are connected and the operator controls the system. In the same way, another area is required to be used as dressing room and take anthropometric measurements of the subject. Altogether a room of 60 m2 is recommended (minimum 30 m2).

 

 

As for the equipment, a PC with plenty of storage and processing is required, about 4 cameras with digital port, spotlights, reflective material for markers, and all necessary wiring to interconnect equipment. Installing a treadmill can also be required for gait analysis studies.

 

 

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