class_docstr: based on https://github.com/cgtuebingen/learning-blind-motion-deblurring/blob/master/synthblur/src/flow.cpp#L44
code: def __init__(self):
      super(Flow, self).__init__()
      self.wheel = None
      self._construct_wheel()
  
imports: import numpy
label_desc: Use image node_id 1 to create a new Flow object from inherited base classes: object with example: obj = Flow()