code: def image_amplitude(self, kwargs_ps, kwargs_lens, k=None):
          
          amp_list = []
          for i, model in enumerate(self._point_source_list):
              if k is None or k == i:
                  amp_list.append(model.image_amplitude(kwargs_ps=kwargs_ps[i], kwargs_lens=kwargs_lens, min_distance=self._min_distance,
                                                          search_window=self._search_window,
                                                          precision_limit=self._precision_limit,
                                                          num_iter_max=self._num_iter_max, x_center=self._x_center,
                                                          y_center=self._y_center))
          return amp_list
docs: returns the image amplitudes
  
          :param kwargs_ps:
          :param kwargs_lens:
          :return: