System information

MX Calibration Kit
Vicon MX Hardware System Reference 12-5
Static Calibration Object
The ergo calibration frame is a static calibration object used to set the
global coordinate system in the capture volume. Using the handle
provided by the large rectangular hole in the plate, place the object
in the field of view of at least three cameras in your capture volume.
Turn the adjuster screws until the bubbles in the two spirit levels are
in the center. Once the frame is level, you can slide the attached
covers to conceal the spirit levels. When not in use, you can hang the
frame on a wall hook using the notched circular hole in the frame.
The frame comes with four 9.5 mm markers attached. You can
replace these with the 14 mm or 25 mm markers in the Calibration
Marker Pack. All four markers on the calibration frame must be the
same size.
Calibration Reference Object file
The Calibration Reference Object file (Ergocal.cro) ensures that
Workstation software contains configuration entries corresponding to
the calibration objects supplied in the Calibration Kit. Once you have
constructed the desired calibration objects, you must specify the
appropriate entry when configuring the calibration process in the
Workstation software (for details, see the Workstation System
Reference book).
For example, if you construct a 3-marker wand using the 240 mm
Wand Spacer Bar with 14 mm markers (item 1 in Figure 12-1 on
page 12-2) and you attach the 25 mm markers to the Ergocal
L-Frame (item 8 in Figure 12-1), select the following entry in the
Calibrate Cameras dialog box in the Workstation software:
1C) Ergocal 25mm mkr – 240mm Wand 14mm mkr
MXhardware_Reference.book Page 5 Thursday, September 7, 2006 11:36 AM