Sometimes, tracking involves fusions and divisions of tracks.

If fusions are allowed and only one segmented object can be found within the search radius of where two objects were found previously, the algorithm will assume that those two objects merged into a single one, and the tracks will merge.

Likewise, if divisions are allowed and two objects are found in the search radius of a track where only one existed previously, the algorithm will assume that the object divided or split and the tracking will continue along both branches.

Some points of note:

• The algorithm has no ability to differentiate between intended and accidental splits and fusions. To limit the number of errors it is important to optimize the segmentation to reduce the number of unintended splits.
• Allowing fusions and divisions increases the possibilities for error. It is best not to use these options unless the purpose of the tracking task is to identify fusions and divisions.

Additional options relating to tracking fusions and divisions are available and described in the help files.