"""Base classes for trackers."""

class BaseTracker:
    """Base class for all trackers."""

    def __init__(self, params):
        """Initialize the tracker.

        args:
            params: Tracker parameters.
        """
        self.params = params
    
    def initialize(self, image, state):
        """Initialize the tracker with an image and target state.

        args:
            image: First frame
            state: Target state in first frame, usually a bounding box [x, y, w, h]
        """
        raise NotImplementedError
    
    def track(self, image):
        """Track in the current frame.

        args:
            image: Current image
        
        returns:
            State of the target, usually a bounding box [x, y, w, h]
        """
        raise NotImplementedError