Figure 3-6 Flowchart Of Tool Tracking Parameters Use - Northern Digital Polaris Vicra User Manual

How the Polaris Vicra System Works
Flash illuminators on
Position Sensor
Measure positions of
markers
Calculate tool
transformation using at
least 3 markers
Are all
markers within the
max. marker
angle?
yes
all markers
inside the characterized
measurement
volume?
yes
the min. number of
markers used to calculate
a transformation?
yes
Are all markers
within the max.
3D error?
yes
Are the spread
parameters satisfied?
yes
Return tool transformation &
status and error information
34
Ignore markers that are outside
no
Are
no
Were
no
Ignore markers that are greater than
no
Calculate tool transformation using at
least the min. number of markers.
no

Figure 3-6 Flowchart of Tool Tracking Parameters Use

of the max. marker angle &
calculate tool transformation
using at least 3 markers
Can the
system calculate a
tool transformation without
the out-of-volume
markers?
yes
Ignore the out-of-volume
markers &
calculate tool transformation
using at least 3 markers
the max. 3D error
&
Is reply option
no
0x0800 used with BX or TX
command?
yes
Return MISSING &
status and error information
Polaris Vicra User Guide - Revision 2
no