On-camera marker discrimination

The marker settings of the cameras include settings that can be used to filter the markers on the camera. The available methods are:

• Marker limits: for the marker limit settings, see chapter Marker limits.

• Marker masking, see chapter Marker masking.

Discarded markers are not sent to QTM, which means that the on-camera marker discrimination is irreversible, and cannot be undone by reprocessing a file. The advantage of on-camera marker discrimination is that it can unload QTM from processing obsolete markers, which can lead to increased processing speed. This can be important, especially for real-time applications.

If you want to keep all data, filtering can also be applied post-hoc as a processing step by preprocessing the 2D data in QTM. The alternative methods are:

• Marker size filtering, see chapter How to use marker size filter.

• Software marker masks, see chapter How to use software marker masks.

On Oqus cameras, marker circularity filtering is also available. This type of filtering is used in combination with 2D preprocessing of the data, which allows to choose how to use the information provided by the filter. For more information, see chapter Marker circularity filtering (Oqus only).