code: def resolution_phantom(shape=None):
      
      # TODO: Store data in some ODL controlled url
      # TODO: This can be also done with ODL's ellipse_phantom
      name = 'phantom_resolution.mat'
      url = URL_CAM + name
      dct = get_data(name, subset=DATA_SUBSET, url=url)
      im = np.rot90(dct['im'], k=3)
  
      return convert(im, shape)
docs: Resolution phantom for tomographic simulations.
  
      Returns
      -------
      An image with the following properties:
          image type: gray scales
          shape: [1024, 1024] (if not specified by `size`)
          scale: [0, 1]
          type: float64