def __init__(self, pLK=None):
    if (pLK is None):
        pLK = self.pLK0()
    self.lk_ = cv2.SparsePyrLKOpticalFlow_create(**pLK)
    self.tmp_ = defaultdict((lambda : None))
def __init__(self, pLK=None):
    if (pLK is None):
        pLK = self.pLK0()
    self.lk_ = cv2.SparsePyrLKOpticalFlow_create(**pLK)
    self.tmp_ = defaultdict((lambda : None))