[docs]class Frame():
"""The base Component interface defines operations that can be altered by decorators.
Attributes:
img: an image array
"""
def __init__(self, input_image):
self.img = input_image
[docs] def apply(self):
"""To get input image"""
return self.img
[docs]class FrameDecorator(Frame):
_frame: Frame = None
def __init__(self, frame: Frame):
""" The base Decorator class follows the same interface as the other components. The primary purpose of this class is to define the wrapping interface for all concrete decorators. The default implementation of the wrapping code might include a field for storing a wrapped component and the means to initialize it.
Attributes:
_frame: a Frame instance
"""
if isinstance(frame, Frame):
self._frame = frame
else:
self._frame = Frame(frame)
@property
def frame(self):
"""
The Decorator delegates all work to the wrapped component.
"""
return self._frame
[docs] def apply(self, input_image):
return self._frame.apply(input_image)