def to_tlwh(self):
        """Get current position in bounding box format `(top left x, top left y,
        width, height)`.
        Returns
        -------
        ndarray
            The bounding box.
        """
        ret = self.mean[:4].copy()
        ret[2] *= ret[3]
        ret[:2] -= ret[2:] / 2
        return ret
Get current position in bounding box format `(top left x, top left y,
        width, height)`.
        Returns
        -------
        ndarray
            The bounding box.
        
trackers/deepsort_tracker/track.py