Read through our frequently asked questions below

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How Accurate / Precise are your systems?

The answer to this question depends significantly on the definition of the terms ‘Accuracy’ and ‘Precision’ (see ‘How Are the Terms ‘Accuracy’ & ‘Precision’ defined?), and how it is measured (see ‘How Do You Test Accuracy / Precision?’). Differing methods produce widely varying results (image below) and care must be taken when making comparisons to take account of all the variables involved.

The figures provided below are obtained following ASTM E3064 standard (‘Standard Test Method for Evaluating the Performance of Optical Tracking Systems that Measure Six Degrees of Freedom (6DOF) Pose‘) and represent the ability to track the relative position of a rigid object while the object is moving, with no filtering or post-processing.

High-End Volume (Vantage V16) Mid-Range Volume (Vantage V5)
Total Number of Capture Frames 41993 62525
Reference Value (Measured Bar Length, r, mm) 320.880 320.880
Mean Observed Bar Length (𝑙̅, mm) 320.863 320.897
Accuracy of Mean to Reference Value (or ‘Trueness’, |𝒍̅−𝒓|, mm) 0.017 0.017
Standard Deviation of Observations (𝝈, mm) 0.198 0.321
Root Mean Squared Error (RMSE, mm) 0.201 0.324

* Mean of all trials

Example trial data for a single capture from the larger dataset
Example trial data for a single capture from the larger dataset. In total, there were 20 trials across 4 calibrations for each configuration, for a volume of 192m3 with 24 cameras.

Please contact Vicon ([email protected]) for further details or to request a white paper detailing the experimental methods used.