I'd like to share how we can exchange data between open3d.Image and numpy. I think this would be helpful for python beginners like me X)

open3d-numpy-test.py

from unittest import TestCase
from functools import reduce

import numpy as np
import numpy.testing as npt

from open3d.py3d import Image


class TestNumpyImage(TestCase):
    def test_new_image(self):
        shape = (2, 1, 3)

        array = np.arange(reduce(lambda x, y: x * y, shape), dtype=np.float32).reshape(shape)
        img = Image(array)
        actual = np.array(img)
        self.assertTupleEqual(actual.shape, shape)
        npt.assert_array_equal(actual, array)

        img_view = memoryview(img)
        self.assertTupleEqual(img_view.shape, shape)