def test_global_average_pool_basic(self):
pool = nn_layers.GlobalAveragePool3D(keepdims=True)
inputs = tf.ones([1, 2, 3, 4, 1])
outputs = pool(inputs, output_states=False)
expected = tf.ones([1, 1, 1, 1, 1])
self.assertEqual(outputs.shape, expected.shape)
self.assertAllEqual(outputs, expected)
def test_global_average_pool_keras(self):
pool = nn_layers.GlobalAveragePool3D(keepdims=False)
keras_pool = tf.keras.layers.GlobalAveragePooling3D()
inputs = 10 * tf.random.normal([1, 2, 3, 4, 1])
outputs = pool(inputs, output_states=False)
keras_output = keras_pool(inputs)
self.assertAllEqual(outputs.shape, keras_output.shape)
self.assertAllClose(outputs, keras_output)
def test_stream_global_average_pool(self):
gap = nn_layers.GlobalAveragePool3D(keepdims=True, causal=False)
inputs = tf.range(4, dtype=tf.float32) + 1.
inputs = tf.reshape(inputs, [1, 4, 1, 1, 1])
inputs = tf.tile(inputs, [1, 1, 2, 2, 3])
expected, _ = gap(inputs)
for num_splits in [1, 2, 4]:
frames = tf.split(inputs, num_splits, axis=1)
states = {}
predicted = None
for frame in frames:
predicted, states = gap(frame, states=states)
self.assertEqual(predicted.shape, expected.shape)
self.assertAllClose(predicted, expected)
self.assertAllClose(predicted, [[[[[2.5, 2.5, 2.5]]]]])
def test_causal_stream_global_average_pool(self):
gap = nn_layers.GlobalAveragePool3D(keepdims=True, causal=True)
inputs = tf.range(4, dtype=tf.float32) + 1.
inputs = tf.reshape(inputs, [1, 4, 1, 1, 1])
inputs = tf.tile(inputs, [1, 1, 2, 2, 3])
expected, _ = gap(inputs, output_states=True)
for num_splits in [1, 2, 4]:
frames = tf.split(inputs, num_splits, axis=1)
states = {}
predicted = []
for frame in frames:
x, states = gap(frame, states=states, output_states=True)
predicted.append(x)
predicted = tf.concat(predicted, axis=1)
self.assertEqual(predicted.shape, expected.shape)
self.assertAllClose(predicted, expected)
self.assertAllClose(predicted,
[[[[[1.0, 1.0, 1.0]]], [[[1.5, 1.5, 1.5]]],
[[[2.0, 2.0, 2.0]]], [[[2.5, 2.5, 2.5]]]]])