def test_split_merge_random(self, num_levels):
"""Tests that splitting and merging back can reproduce the input."""
tensor_shape = np.random.randint(1, 5, size=4).tolist()
image_random = np.random.uniform(size=tensor_shape)
split = pyramid.split(image_random, num_levels=num_levels)
merge = pyramid.merge(split)
self.assertAllClose(image_random, merge)
def test_split_jacobian_random(self):
"""Tests the Jacobian for random inputs."""
split = lambda image: pyramid.split(image, num_levels=_NUM_LEVELS)
tensor_shape = np.random.randint(1, 5, size=4).tolist()
image_random_init = np.random.uniform(size=tensor_shape)
for level in range(4): # pylint: disable=unused-variable
self.assert_jacobian_is_correct_fn(
lambda x, level=level: split(x)[level], [image_random_init])
def test_split_jacobian_random(self):
"""Tests the Jacobian for random inputs."""
tensor_shape = np.random.randint(1, 5, size=(4)).tolist()
image_random_init = np.random.uniform(size=tensor_shape)
image_random = tf.convert_to_tensor(value=image_random_init)
split_random = pyramid.split(image_random, num_levels=4)
for level in split_random:
self.assert_jacobian_is_correct(image_random, image_random_init,
level)
def test_split_preset(self, image, image_high, image_low):
"""Tests that the split function splits the image as expected."""
split = lambda image: pyramid.split(image, num_levels=1)
image = tf.expand_dims(tf.expand_dims(image, axis=-1), axis=0)
image_high = tf.expand_dims(tf.expand_dims(image_high, axis=-1), axis=0)
image_low = tf.expand_dims(tf.expand_dims(image_low, axis=-1), axis=0)
pyramid_split = split(image)
with self.subTest(name="image_high"):
self.assertAllClose(image_high, pyramid_split[0])
with self.subTest(name="image_low"):
self.assertAllClose(image_low, pyramid_split[1])
def test_split_exception_raised(self, error_msg, *shape):
"""Tests that the shape exceptions are properly raised."""
split = lambda image: pyramid.split(image, num_levels=_NUM_LEVELS)
self.assert_exception_is_raised(split, error_msg, shape)
def test_split_exception_not_raised(self, *shape):
"""Tests that the shape exceptions are not raised."""
split = lambda image: pyramid.split(image, num_levels=_NUM_LEVELS)
self.assert_exception_is_not_raised(split, shape)
