class_docstr: Enlarge the area.
class_docstr_tok: ["Enlarge","the","area","."]
code: def __call__(self, im, dpi):
      alpha = np.pad(im[..., 3], self.pixels, "constant")
      alpha2 = np.clip(
          smooth2d(alpha, self.pixels / 72 * dpi) * 5, 0, 1
      )
      new_im = np.empty((*alpha2.shape, 4))
      new_im[:, :, :3] = self.color
      new_im[:, :, 3] = alpha2
      offsetx, offsety = -self.pixels, -self.pixels
      return new_im, offsetx, offsety
  
imports: import matplotlib.pyplot
  import numpy
  from matplotlib.artist import Artist
  import matplotlib.cm
  from matplotlib.colors import LightSource
  import matplotlib.transforms
label_desc: Use image node_id 2 for calling the GrowFilter obj's underlying member method code with example usage: obj.__call__(im, dpi) and returns: new_im,  offsetx,  offsety