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However, it may not always be obvious that the tracking is failing for a few frames or that the pose of the object is noisy in particular parts of the volume, particularly when dealing with large numbers of objects. In these cases, examining the primary camera calibration health metrics may indicate potential issues. For details, see Examine the main health metrics.
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Examine the main health metrics
In cases where the Graph Plots view does not reveal the source of any issues (see Plot graphs of object count and object position/rotation), the following primary camera calibration health metrics can help to reveal potential problems.
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For information about the meaning of the colors of the centroids in the Cameras view, see About the Cameras view and to find out how to change your view of the centroids, see Set appropriate View Filters.
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In addition to the bump notification warning, the System Health Report also provides a Camera Accelerometer section, which displays a graph showing the maximum accelerometer signal for any camera. This is useful for showing when the cameras accelerometers are detecting motion that may not trigger the bump notification warning but may still be of interest or concern, eg, a door slamming may cause the cameras to momentarily shift but will likely return to their previous position, and the tracking may be affected for a very limited period.
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Monitor camera temperature
Several common issues with camera calibration arise from changes in temperature. Ambient temperature changes may cause thermal expansion/contraction of the camera rig causing camera positions to change from their calibrated values. Internal changes of temperature can lead to internal shifts of lens elements and the sensor that may invalidate calibrated parameters.
For this reason, Vicon cameras, have onboard temperature sensors that can be used to help monitor temperatures. The System Health Report contains a Camera Temperatures section (see Camera Temperatures), which collates all the temperature sensor information for the cameras that can be found in a camera's properties in the System panel (see Vicon Cameras settings).
Generally if there are no observable problems in the tracking of objects and the camera calibration health metrics such as Centroid Connectivity and Image Error do not indicate a problem then changes in temperature can be assumed to be harmless. The temperature warnings are most useful in helping to diagnose issues.