This method saves the image from a numpy array using Pillow
        (PIL fork)

        :param fname: Location and name of the image file to be saved.
        :param pixel_array: Numpy pixel array, i.e. ``numpy()`` return value

        This method will return True if successful

def save_as_pil(self, fname, pixel_array=None):
        """  This method saves the image from a numpy array using Pillow
        (PIL fork)

        :param fname: Location and name of the image file to be saved.
        :param pixel_array: Numpy pixel array, i.e. ``numpy()`` return value

        This method will return True if successful
        """
        if pixel_array is None:
            pixel_array = self.numpy

        from PIL import Image as pillow
        pil_image = pillow.fromarray(pixel_array.astype('uint8'))
        pil_image.save(fname)
        return True