Tracker Ranges

MaxREAL uses 2 different 3D Transformation Modules, Normal Range Tracker module and the Extended Range Tracker module. Both modules uses the same calibration and camera linearization so the 3D accuracy is the same. There is also a Dynamic switching mode available. This will select the tracker module using the distance between the body markers and the cameras as the criteria. You can set the distance threshold in the Options Dialog.

The maximum distance from the cameras that a 3D marker can be detected depends on the separation between the cameras and also the number of cameras and their placements. When using only 2 cameras, this will be more critical. The less separation between the cameras, the closer the markers must be in order for the 3D transformation to work reliably. The 2 different modules that MaxREAL uses has both some pros and some cons.

Normal Range Tracker		Extended Range Tracker
PROS	CONS	PROS	CONS
Fast. Less than 0.5 ms	Object to Camera distance has limits. Approx 18-20" with Max1500 cameras.	Can track objects up to 28-32" away from cameras with Max1500 cameras.	Slower. Adds approx 0.5-1 ms of latency.
"Phantom Points" removal. Due to limited camera separation false 3D points may be created by the 3D Transformation. NRT will recognize and eliminate majority of these false points.			Removal of "Phantom Points" not as efficient and accurate compared to NRT. Note that this is usually do not cause any problems. Max Residuals may need to be adjusted in case of excessive number of "Phantom Points"