In the boundary case of n_init==1, the current implementation fails to replicate the idea behind DeepSort.
Write now the default value of TrackState for a new Track instance is set to be equal to Tentative. This value is then updated upon the first match in the tracking. However, if n_init==1 and we have an immediate occlusion, as the track was marked tentative will never get to a match state and consequently, the TrackState will never change to Confirmed.
Fix
in the constructor of Track assign initial value to TrackState according to hits and n_init.
self.state = TrackState.Tentative if self.hits < self._n_init else TrackState.Confirmed
Compatibility
Adding this line does not effect the regular behaviour of the source code except for the boundary case discussed (n_init==1).
In case that n_init > 1, the expression simplifies to the following. Keep in mind that hits==1 in constructor.
self.state = TrackState.Tentative if 1 < self._n_init else TrackState.Confirmed
Or more simple as
self.state = TrackState.Tentative if True else TrackState.Confirmed
With final value equaling to
self.state = TrackState.Tentative
which is the the current behaviour of the source code.
Bug
In the boundary case of n_init==1, the current implementation fails to replicate the idea behind DeepSort.
Write now the default value of
TrackStatefor a newTrackinstance is set to be equal toTentative. This value is then updated upon the first match in the tracking. However, if n_init==1 and we have an immediate occlusion, as the track was marked tentative will never get to a match state and consequently, the TrackState will never change toConfirmed.Fix
in the constructor of
Trackassign initial value toTrackStateaccording tohitsandn_init.Compatibility
Adding this line does not effect the regular behaviour of the source code except for the boundary case discussed (n_init==1).
In case that n_init > 1, the expression simplifies to the following. Keep in mind that hits==1 in constructor.
Or more simple as
With final value equaling to
which is the the current behaviour of the source code.