WorldViz PPT-E, Руководство по эксплуатации, Страница: 158 / 163

PPT User’s Manual
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Is it be possible to have a pilot subject walk around a volume with 3
markers on his or her torso and 1 on the head and have them do different
kinds of motions like ducking and weaving and turning around?
Yes, by using 4 cameras mounted at the corners of a 10x10x10 space
If our volume is significantly smaller than 10 m x 10 m x 10 m, is the
resolution and associated precision and accuracy numbers better for our
situation? The cameras would be considerably closer to the markers.
3D resolution and accuracy are both entirely dependent on the camera geometry; 3D
resolution increases as your close the camera geometry. The reason is simply that
you are dividing a smaller volume with the same 1:20,000 chopper, so you get
smaller pieces. The thing that complicates this, though, is the arrangement of the
cameras. Placing two cameras close to each other so there's a tiny base distance
between them essentially makes them act as a single camera. The ideal
configuration is always to have the cameras' lines-of-sight perpendicular to each
other. This is very rarely the case, however, in real setups.
Contact technical support
For immediate assistance with PPT questions not addressed here, go to
www.worldviz.com/support and send an email to ppthelp@worldviz.com
TECHNICAL SPECIFICATIONS FOR PPT-E
Sensor type
B&W CMOS
Degrees of freedom
3DOF position - standard optical only
6DOF incl orientation - with optional sensor
Maximum camera range
20 meters **
Suggested tracking space
20 x 20 x 10 meters **
Maximum number of targets
Up to 32 independent 3DOF bodies *
Maximum number of cameras
System can be expanded to 32 cameras *