User's Manual

Document MV0319P.N

MVN User Manual

 Click the Calibration tab. Select N-pose or T-pose and follow the instructions to

perform a sensor to segment calibration. Additional calibration poses are also

possible if expert calibration routines are enabled. See Section 8.2.

 Pay attention to the calibration quality displayed in the Messages for Calibration

window before applying the calibration to the character. See Section 8.2.6.

Preview and Record. See Section 9.

 The live character can be seen in MVN Studio viewport. See Section 9.1.

 To record a trial, click the red “Record” button. See Section 9.2.

Playback and editing. See Section 10.

 The recorded trials can be played, using familiar playback buttons. See Section 10.1.

 Contact editing is used to manually determine when contact is made between the

subject and the surroundings. See Section 10.3.2.

Analysis. See Section 11.

 Graphical representation of all data, real-time and offline. Section 11.1.

Saving and Exporting. See Section 12.

MVN trials are saved directly as files with the .mvn extension. Files with this extension

can be opened in MVN Studio. Data can also be exported to:

 BVH (BioVision Hierarchical data) embeds captured motion data in ASCII format

which can be imported in many animation applications. BVH requires a strict

hierarchal structure, and only relative joint angles can be exported into this file format.

This will cause differences between the BVH output and the originally captured

motion. See Section 12.2.

 C3D (Coordinate 3D) is a format used prolifically in optical systems. The format is

coordinate 3D; therefore bony landmark points have been calculated and exported

from MVN (virtual marker set). See Section 12.3.

 FBX (Filmbox) is a platform-independent 3D file format enabling access to Autodesk

software (MotionBuilder, Maya or XSI). For some software packages, an FBX plug-in

should be installed. FBX files exported from MVN contain position and orientation

information of all 23 segments. See Section 12.4.

 MVNX is a human readable, XML format which can be imported to many other

software programs, including MATLAB and Excel. This format contains the most

information, including the sensor data, segment kinematics and joint angles, as well

as the subject information needed to recreate a 3D visualization of a character. See

Section 12.5.

 Movie Exporter is an mpeg-4 (.m4v or .avi) video export tool which contains a capture

of the character’s live motion as configured in the display window.

3.4 Tips for best practice

3.4.1 Operating conditions

The recommended operating temperature of the MVN System is between -10°C and +50°C ambient

temperature. If operated outside this temperature range performance may decrease or the device might

be damaged. Fast transient temperature fluctuations may cause significant temperature gradients

across the device. Such gradients cannot be properly modelled by temperature compensation and may