System information

Vicon MX Hardware System Reference 12-1
12
12MX Calibration Kit
This chapter describes the purpose and contents of the MX Calibration
Kit supplied with Vicon MX.
Calibration Process
The performance of the Vicon MX depends crucially on the accuracy
with which the system is calibrated. The calibration process involves
identifying both internal (focal length and image distortion) and
external (camera position and orientation) camera parameters.
Vicon MX uses a single Dynamic Calibration (DynaCal) process to
calculate all of these parameters through two simultaneous phases:
•Linearization
The optical distortion of the camera lenses and any other non-
linearity in the system is measured, and a correction matrix is
calculated. The corrections are applied to every frame of data
subsequently acquired by each camera.
• Photogrammetric Calibration
The physical locations and orientations of the cameras are
calculated, referring to a user-defined set of coordinates.
This DynaCal calibration process requires the accurate use of the
specialized equipment supplied in the MX Calibration Kit.
The kit contents are described in this chapter. For details on using the
calibration apparatus with the current version of Vicon software on
the host PC, see the software documentation.
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