User's Manual

Document MV0319P.N
© Xsens Technologies B.V.
MVN User Manual
47
calibration). For short recordings, the drift of the character is typically limited to a few cm. With multi-
person capture, the characters can drift apart after a while. Usually this can be fixed in the animation
package used for retargeting the motion data to a virtual character.
To reset the position of the characters in between recordings, select the character in the navigator, ask
the subject to return to the marked position on the floor and select menu > Tasks > ‘Move Character to
Origin’ , or press ‘Ctrl-0’ (Ctrl+[Zero Key]).
8.2.2 N-Pose (Neutral pose)
The N-Pose calibration is a basic calibration. It can be performed as a stand-alone calibration or before
the hand-touch. When performing the calibration, take care of the following:
 Stand upright on a horizontal surface
 Feet parallel, one foot width apart.
 Knees above feet.
 Hips above knees.
 Back straight.
 Shoulders above hips; do not pull the shoulders up.
 Arm straight alongside body (vertically), thumbs forwards. Check
the correct attitude of the arms by flexing and extending the
elbows. The forearms should move only in the vertical (sagittal)
plane with the palms of the hands facing each other.
 Face forward.
 Do not move during the calibration procedure.
Following the calibration, if the legs of the 3D character are crossed,
when the feet are together then the feet were too far apart during the
calibration. Repeat the calibration procedure with the feet closer
together for an improved result.
Figure 35: N-Pose
8.2.3 T-pose
The T-pose is the other basic calibration pose. This is recommended if the subject cannot hold the arms
vertically near the body. When performing a calibration, take care of the following:
 Stand upright on a horizontal surface.
 Feet parallel, one foot width apart.
 Knees above feet.
 Hips above knees.
 Back straight.
 Shoulders above hips; do not pull the shoulders up.
 Arms extended horizontally, thumbs forwards. Check
the correct attitude of the arms by flexing and extending
the elbows. The forearms should move in the horizontal
(transverse) plane.
 Face forward.
 Pay attention to symmetry, for example, keep the arms
at an equal height.
 Do not overextend the elbow, since flexion/extension
may be projected in other axes.
 The wrists, elbows and shoulders should all be on a
single line.
Figure 36: T-pose