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import numpy as np
from collections import OrderedDict
class TrackState(object):
New = 0
Tracked = 1
Lost = 2
Removed = 3
class BaseTrack(object):
_count = 0
track_id = 0
is_activated = False
state = TrackState.New
history = OrderedDict()
features = []
curr_feature = None
score = 0
start_frame = 0
frame_id = 0
time_since_update = 0
# multi-camera
location = (np.inf, np.inf)
@property
def end_frame(self):
return self.frame_id
@staticmethod
def next_id():
BaseTrack._count += 1
return BaseTrack._count
def activate(self, *args):
raise NotImplementedError
def predict(self):
raise NotImplementedError
def update(self, *args, **kwargs):
raise NotImplementedError
def mark_lost(self):
self.state = TrackState.Lost
def mark_removed(self):
self.state = TrackState.Removed
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