Main Content


Delete existing track

Since R2020a



deleted = deleteTrack(tracker,trackID) deletes the track specified by trackID in the tracker.


collapse all

Create a track using detections in a multiObjectTracker tracker.

tracker = multiObjectTracker 
tracker = 
  multiObjectTracker with properties:

                  TrackerIndex: 0
       FilterInitializationFcn: 'initcvkf'
           AssignmentThreshold: [30 Inf]
                  MaxNumTracks: 200
              MaxNumDetections: Inf
                 MaxNumSensors: 20

                  OOSMHandling: 'Terminate'

         ConfirmationThreshold: [2 3]
             DeletionThreshold: [5 5]

            HasCostMatrixInput: false
    HasDetectableTrackIDsInput: false
               StateParameters: [1x1 struct]

                     NumTracks: 0
            NumConfirmedTracks: 0

detection1 = objectDetection(0,[1;1;1]);
detection2 = objectDetection(1,[1.1;1.2;1.1]);
ans = 
  objectTrack with properties:

                     TrackID: 1
                    BranchID: 0
                 SourceIndex: 0
                  UpdateTime: 1
                         Age: 2
                       State: [6x1 double]
             StateCovariance: [6x6 double]
             StateParameters: [1x1 struct]
               ObjectClassID: 0
    ObjectClassProbabilities: 1
                  TrackLogic: 'History'
             TrackLogicState: [1 1 0 0 0]
                 IsConfirmed: 1
                   IsCoasted: 0
              IsSelfReported: 1
            ObjectAttributes: [1x1 struct]

Delete the first track.

deleted1 = deleteTrack(tracker,1)
deleted1 = logical

Uncomment the following to delete a nonexistent track. A warning will be issued.

% deleted2 = deleteTrack(tracker,2)

Input Arguments

collapse all

Multi-object tracker, specified as a multiObjectTracker System object.

Track identifier, specified as a positive integer.

Example: 21

Output Arguments

collapse all

Indicate if the track was successfully deleted or not, returned as 1 or 0. If the track specified by the trackID input existed and was successfully deleted, it returns as 1. If the track did not exist, a warning is issued and it returns as 0.

Version History

Introduced in R2020a