(boxes, probs, cls_idx)
Filter bounding box predictions with probability threshold and
  non-maximum supression.

  Args:
    boxes: array of [cx, cy, w, h].
    probs: array of probabilities
    cls_idx: array of class indices
  Returns:
    final_boxes: array of filtered bounding boxes.
    final_probs: array of filtered probabilities
    final_cls_idx: array of filtered class indices
Filter bounding box predictions with probability threshold and
  non-maximum supression.
Filter bounding box predictions with probability threshold and non - maximum supression .
def filter_prediction(boxes, probs, cls_idx):
  """Filter bounding box predictions with probability threshold and
  non-maximum supression.

  Args:
    boxes: array of [cx, cy, w, h].
    probs: array of probabilities
    cls_idx: array of class indices
  Returns:
    final_boxes: array of filtered bounding boxes.
    final_probs: array of filtered probabilities
    final_cls_idx: array of filtered class indices
  """
  pass
def filter_prediction ( boxes , probs , cls_idx ) : pass