def test_compute_densitity_network(self):
"""Verify density computation of the network defined in setUp().
The test uses a pre-computed density over the network.
We do not cover multiple cnn's coexisting in the graph, because
TensorFlow adds some strange nodes if multiple grpahs are present.
"""
tf.reset_default_graph()
# Build an identical network, with a different scope.
with tf.variable_scope(name_or_scope="cnn"):
# Declare input
input_placeholder = tf.placeholder(tf.float32,
shape=(None, 28, 28, 1))
# Do the parsing
sequence_to_net(self.net_nsc, input_placeholder)
# Computed beforehand
target_density = 1.2756756756756757 # Before: 1.281767955801105
# Assert the value
self.assertEqual(
compute_network_density(tf.get_default_graph(), "cnn"),
target_density)
def test_sequence_to_net_concat_nonused(self):
"""Verify that the concatenation of non-used layers is correct."""
tf.reset_default_graph()
custom_graph_dir = self.graphs_dir + "/test02"
if os.path.isdir(custom_graph_dir):
shutil.rmtree(custom_graph_dir)
with tf.variable_scope(name_or_scope="cnn"):
net_nsc = [
(1, 4, 0, 0, 0), # Layer 1: Identity(input)
(2, 1, 1, 1, 0), # Layer 2: Convolution(Layer1)
(3, 1, 3, 2, 0), # Layer 3: Convolution(Layer2)
(4, 1, 1, 1, 0), # Layer 4: Convolution(Layer1)
(5, 1, 5, 4, 0), # Layer 5: Convolution(Layer4)
(6, 2, 3, 1, 0), # Layer 7: MaxPooling(Layer1)
(7, 1, 1, 6, 0), # Layer 8: Convolution(Layer7)
(8, 7, 0, 0, 0), # Layer 10: Terminal
]
# Declare input
input_placeholder = tf.placeholder(tf.float32,
shape=(None, 28, 28, 1))
# Do the parsing
sequence_to_net(net_nsc, input_placeholder)
# Save the graph
file_writer = tf.summary.FileWriter(custom_graph_dir,
tf.get_default_graph())
file_writer.close()
# graph = tf.get_default_graph()
self.assertTrue(os.path.isdir(custom_graph_dir))
def test_sequence_to_net_addlayer(self):
"""Verify that the safe_add() method works correctly."""
tf.reset_default_graph()
custom_graph_dir = self.graphs_dir + "/test04"
if os.path.isdir(custom_graph_dir):
shutil.rmtree(custom_graph_dir)
with tf.variable_scope(name_or_scope="cnn"):
net_nsc = [
(1, 4, 0, 0, 0), # Layer 1: Identity(input)
(2, 1, 1, 1, 0), # Layer 2: Convolution(Layer1)
(3, 1, 3, 2, 0), # Layer 3: Convolution(Layer2)
(4, 1, 1, 1, 0), # Layer 4: Convolution(Layer1)
(5, 1, 5, 4, 0), # Layer 5: Convolution(Layer4)
(6, 5, 0, 3, 5), # Layer 6: Add(Layer3, Layer5)
(7, 2, 3, 1, 0), # Layer 7: MaxPooling(Layer1)
(8, 1, 1, 7, 0), # Layer 8: Convolution(Layer7)
(9, 5, 0, 6, 8), # Layer 9: Add(Layer6, Layer8)
(10, 7, 0, 0, 0), # Layer 10: Terminal
]
# Declare input
input_placeholder = tf.placeholder(tf.float32,
shape=(None, 28, 28, 1))
# Do the parsing
sequence_to_net(net_nsc, input_placeholder)
# Save the graph
file_writer = tf.summary.FileWriter(custom_graph_dir,
tf.get_default_graph())
file_writer.close()
self.assertTrue(os.path.isdir(custom_graph_dir))
def test_sequence_to_net_short(self):
"""Verify that the short NSC sequence is build correctly."""
tf.reset_default_graph()
custom_graph_dir = self.graphs_dir + "/test03"
if os.path.isdir(custom_graph_dir):
shutil.rmtree(custom_graph_dir)
with tf.variable_scope(name_or_scope="cnn"):
net_nsc = [
(1, 4, 0, 0, 0), # Layer 1: Identity(input)
(2, 1, 3, 1, 0), # Layer 2: Convolution(Layer1)
(3, 1, 3, 2, 0), # Layer 3: Convolution(Layer2)
(4, 5, 0, 1, 3), # Layer 4: Convolution(Layer1)
(5, 7, 0, 0, 0), # Layer 5: Convolution(Layer4)
]
# Declare input
input_placeholder = tf.placeholder(tf.float32,
shape=(None, 28, 28, 1))
# Do the parsing
sequence_to_net(net_nsc, input_placeholder)
# Save the graph
file_writer = tf.summary.FileWriter(custom_graph_dir,
tf.get_default_graph())
file_writer.close()
self.assertTrue(os.path.isdir(custom_graph_dir))
def test_compute_flops(self):
"""Verify the FLOPs computation of the network defined in setUp().
The test uses a pre-computed FLOPs value over the network.
This test case handles the case where more than 1 graph scopes are
co-existing in the TensorFlow workspace, so that we verify that the
FLOPs computation is not getting affected by those operations. This is
needed because the computation of FLOPs depends on the correct
filtering of the scope using regex.
"""
tf.reset_default_graph()
# Build a first neural network with one scope.
with tf.variable_scope(name_or_scope="tnn"):
# Declare input
input_placeholder = tf.placeholder(tf.float32,
shape=(None, 28, 28, 1))
# Do the parsing
sequence_to_net(self.net_nsc, input_placeholder)
# Build a second network, identical to the first one but in a different
# scope.
with tf.variable_scope(name_or_scope="cnn"):
# Declare input
input_placeholder = tf.placeholder(tf.float32,
shape=(None, 28, 28, 1))
# Do the parsing
sequence_to_net(self.net_nsc, input_placeholder)
# Value computed beforehad
target_flops = 75146
# Make the assert operation.
self.assertEqual(
compute_network_flops(tf.get_default_graph(), "cnn",
"workspace/flops_test"), target_flops)
def model_fn(features, labels, mode):
with tf.variable_scope(self.variable_scope):
# 1. Define the input placeholder
if len(self.input_shape) == 2:
net_input = tf.reshape(tensor=features["x"],
shape=[-1] +
list(self.input_shape) + [1],
name="L0_RESHAPE")
else:
net_input = features["x"]
# 2. Simply call the network
self.tf_partial_network = sequence_to_net(
sequence=self.encoded_network, input_tensor=net_input)
# 3. Build the Fully-Connected layers after block.
with tf.name_scope("L_FC"):
# Flatten and connect to the Dense Layer
ll_flat = tf.layers.flatten(inputs=self.tf_partial_network,
name="Flatten")
dense_layer = tf.layers.dense(inputs=ll_flat,
units=1024,
activation=tf.nn.relu,
name="DENSE")
dropout_layer = tf.layers.dropout(
inputs=dense_layer,
rate=0.4,
# pylint: disable=no-member
training=mode == tf.estimator.ModeKeys.TRAIN,
name="DROPOUT")
# 4. Build the Prediction Layer based on a Softmax
with tf.name_scope("L_PRED"):
# Logits layer
logits_layer = tf.layers.dense(inputs=dropout_layer,
units=self.n_clases,
name="PL_Logits")
predictions = {
"classes":
tf.argmax(input=logits_layer,
axis=1,
name="PL_Classes"),
"probabilities":
tf.nn.softmax(logits=logits_layer, name="PL_Softmax")
}
# If we are asked for prediction only, we return the
# prediction and stop adding nodes to the graph.
# pylint: disable=no-member
if mode == tf.estimator.ModeKeys.PREDICT:
return tf.estimator.EstimatorSpec(
mode=mode, predictions=predictions)
# 4. Build the training nodes
with tf.name_scope("L_TRAIN"):
# Loss
loss_layer = tf.losses.sparse_softmax_cross_entropy(
labels=labels, logits=logits_layer)
# Training Op
# pylint: disable=no-member
if mode == tf.estimator.ModeKeys.TRAIN:
# The optimizer via Gradient Descent (we can change it)
optimizer = tf.train.AdamOptimizer(learning_rate=0.001,
beta1=0.9,
beta2=0.999,
epsilon=10e-08,
name="OPT")
# We say that we want to optimize the loss layer using
# the optimizer.
train_op = optimizer.minimize(
loss=loss_layer,
global_step=tf.train.get_global_step(),
name="OPT_MIN")
# And return
# pylint: disable=no-member
return tf.estimator.EstimatorSpec(mode=mode,
loss=loss_layer,
train_op=train_op)
# 5. Build the evaluation nodes.
with tf.name_scope("L_EVAL"):
# Evaluation metric is accuracy
eval_metric_ops = {
"accuracy":
tf.metrics.accuracy(labels=labels,
predictions=predictions["classes"],
name="ACC")
}
# pylint: disable=no-member
return tf.estimator.EstimatorSpec(
mode=mode,
loss=loss_layer,
eval_metric_ops=eval_metric_ops)
