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Markers: Marker Comparison

Passive Markers

     

Active Markers


Marker type

Visibility

IR range

Comments

Passive spherical

from all sides

4 – 10 m, depending on tracking camera type and marker size

sensitive surface

Passive flat

limited: +/- 45°

4 – 10 m, depending on tracking camera type and marker size

cheap,
more robust surface possible

Active, single LED

limited: +/- 60°

> 10 m

electronics and power supply necessary

Active, LED with diffusor sphere

not full sphere, but at least half sphere, depending on mounting of LED

~ 4 m

electronics and power supply necessary

Big active

from all sides

up to 30 m

big and rather expensive, electronics and power supply necessary