def test_compose_rotate(dtype):
image = tf.constant(
[[1, 1, 1, 0], [1, 0, 0, 0], [1, 1, 1, 0], [0, 0, 0, 0]], dtype=dtype)
# Rotate counter-clockwise by pi / 2.
rotation = transform_ops.angles_to_projective_transforms(np.pi / 2, 4, 4)
# Translate right by 1 (the transformation matrix is always inverted,
# hence the -1).
translation = tf.constant([1, 0, -1, 0, 1, 0, 0, 0], dtype=tf.float32)
composed = transform_ops.compose_transforms([rotation, translation])
image_transformed = transform_ops.transform(image, composed)
np.testing.assert_equal(
image_transformed.numpy(),
[[0, 0, 0, 0], [0, 1, 0, 1], [0, 1, 0, 1], [0, 1, 1, 1]],
)
def test_compose(self):
for dtype in _DTYPES:
image = tf.constant(
[[1, 1, 1, 0], [1, 0, 0, 0], [1, 1, 1, 0], [0, 0, 0, 0]],
dtype=dtype)
# Rotate counter-clockwise by pi / 2.
rotation = transform_ops.angles_to_projective_transforms(
np.pi / 2, 4, 4)
# Translate right by 1 (the transformation matrix is always inverted,
# hence the -1).
translation = tf.constant([1, 0, -1, 0, 1, 0, 0, 0],
dtype=tf.dtypes.float32)
composed = transform_ops.compose_transforms(rotation, translation)
image_transformed = transform_ops.transform(image, composed)
self.assertAllEqual(
[[0, 0, 0, 0], [0, 1, 0, 1], [0, 1, 0, 1], [0, 1, 1, 1]],
image_transformed)
