4 ART Tracking Cameras
Rarely there may also be mutual blinding that is not fully illustrated in the Monitor 2DOF
display. Then only the simulated LED bar will indicate high levels of intensity whereas the
presence of markers is missing (see figure 4.13 on page 50).
Figure 4.13: Mutual blinding without reflex illustration
This is a known behaviour of some ARTTRACK2 cameras, which can be easiliy ad-
dressed by updating the firmware. Please contact ART in case you experience alike
problems.
Assigning syncgroups If reorienting the cameras seems not feasible, the cameras
can also be assigned to different syncgroups, i.e. setting individual time delays for each
camera in order to shift the IR flash / measurement of one camera in time from the mea-
surement recording of another camera. In other words, a short time delay (typically <
1ms) is introduced between the measurements of two cameras which are assigned to
different syncgroups. Thus the IR flash of one camera cannot be detected by the other
and vice versa.
Recommendation Assign opposing or adjacent cameras within the FoV of each other to
different syncgroups (e.g. ’Channel 1’ and ’Channel 2’). Cameras, that are outside of
the FoV of each other (e.g. mounted on the same wall) should be assigned to the same
syncgroup. For ARTTRACK5 , ARTTRACK5/C and TRACKPACK/E systems it is possi-
ble to configure the syncgroups via software. Please refer to chapter 8.5.1 on page 146
for further information. For ARTTRACK2 , ARTTRACK3 (discontinued) please refer to
chapter 5.2 on page 60 for installation instructions.
Static reflex suppression You may also take advantage of the functionality of static
reflex suppression, i.e. blocking individual areas of the FoV / measurement volume to
eliminate mutual blinding. DTrack2 and all ART cameras are able to suppress all reflec-
tions in certain areas of the image sensor. Scanning for static reflections allows searching
the measurement FoV for unwanted reflections. Areas are defined on top of the visible
reflections, where all data on the image sensor is neglected during measurements. This
is especially important for setups in multisided projections: these cameras are mounted in
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