def test_evaluate(mod, tfrecords):
#Create
mod.read_data(validation_split=True)
metric_list = [keras_metrics.CategoricalAccuracy(name="acc")]
mod.model.compile(loss="categorical_crossentropy",
optimizer=tf.keras.optimizers.Adam(
lr=float(mod.config['train']['learning_rate'])),
metrics=metric_list)
#Method 1, class eval method
print("Before evaluation")
y_pred, y_true = mod.evaluate(mod.val_split)
print("evaluated")
test_acc = keras_metrics.CategoricalAccuracy()
test_acc.update_state(y_true=y_true, y_pred=y_pred)
method1_eval_accuracy = test_acc.result().numpy()
assert y_pred.shape == y_true.shape
#Method 2, keras eval method
metric_list = mod.model.evaluate(mod.val_split)
metric_dict = {}
for index, value in enumerate(metric_list):
metric_dict[mod.model.metrics_names[index]] = value
assert method1_eval_accuracy == metric_dict["acc"]
def compile(self):
if not self.model:
raise RuntimeError("You have to build the model before compiling it.")
self.model.compile(
optimizer=optimizers.Adam(learning_rate=self.config.model.learning_rate),
loss=losses.CategoricalCrossentropy(from_logits=True),
metrics=[metrics.CategoricalAccuracy(name="accuracy")],
weighted_metrics=[metrics.CategoricalAccuracy("weighted_accuracy")],
sample_weight_mode="temporal",
)
def train(model_file='./mnist/trained_model', num_epochs=5, init=None):
train_ds, test_ds = load_data()
model = MNISTModel()
optimizer = optimizers.Adam()
train_loss = metrics.Mean(name='train_loss')
train_accuracy = metrics.CategoricalAccuracy(name='train_accuracy')
test_loss = metrics.Mean(name='test_loss')
test_accuracy = metrics.CategoricalAccuracy(name='test_accuracy')
if init != None:
model.load_weights(model_file)
@tf.function
def train_step(images, labels):
with tf.GradientTape() as tape:
logits = model(images)
loss_value = loss_object(labels, logits)
grads = tape.gradient(loss_value, model.trainable_variables)
optimizer.apply_gradients(zip(grads, model.trainable_variables))
train_loss(loss_value)
train_accuracy(labels, logits)
@tf.function
def test_step(images, labels):
logits = model(images)
loss_value = loss_object(labels, logits)
test_loss(loss_value)
test_accuracy(labels, logits)
def loss_object(labels, logits):
return tf.nn.softmax_cross_entropy_with_logits(labels=labels,
logits=logits)
for epoch in range(num_epochs):
for images, labels in train_ds:
train_step(images, labels)
for test_images, test_labels in test_ds:
test_step(test_images, test_labels)
template = 'Epoch {}, Loss: {}, Accuracy: {}, Test Loss: {}, Test Accuracy: {}'
print(
template.format(epoch + 1, train_loss.result(),
train_accuracy.result() * 100, test_loss.result(),
test_accuracy.result() * 100))
model.save_weights(model_file)
def model_vgg16_cifar(n_clasif, xshape):
input_shape = xshape[1:]
model = Sequential()
# 2 x Conv
model.add(
Conv2D(64, (3, 3),
input_shape=input_shape,
padding='same',
activation='relu'))
model.add(Conv2D(64, (3, 3), activation='relu', padding='same'))
model.add(MaxPooling2D(pool_size=(2, 2), strides=(2, 2)))
# 2 x Conv
model.add(Conv2D(128, (3, 3), activation='relu', padding='same'))
#model.add(Conv2D(128, (3, 3), activation='relu', padding='same'))
model.add(MaxPooling2D(pool_size=(2, 2), strides=(2, 2)))
# 3 x Conv
model.add(Conv2D(256, (3, 3), activation='relu', padding='same'))
#model.add(Conv2D(256, (3, 3), activation='relu', padding='same'))
model.add(Conv2D(256, (3, 3), activation='relu', padding='same'))
model.add(MaxPooling2D(pool_size=(2, 2), strides=(2, 2)))
# 3 x Conv
model.add(Conv2D(512, (3, 3), activation='relu', padding='same'))
#model.add(Conv2D(512, (3, 3), activation='relu', padding='same'))
#model.add(Conv2D(512, (3, 3), activation='relu', padding='same'))
model.add(MaxPooling2D(pool_size=(2, 2), strides=(2, 2)))
# 3 x Conv
model.add(Conv2D(512, (3, 3), activation='relu', padding='same'))
#model.add(Conv2D(512, (3, 3), activation='relu', padding='same'))
#model.add(Conv2D(512, (3, 3), activation='relu', padding='same'))
model.add(MaxPooling2D(pool_size=(2, 2), strides=(2, 2)))
model.add(Flatten())
model.add(
Dense(1000,
activation='relu',
activity_regularizer=regularizers.l2(0.001)))
model.add(
Dense(1000,
activation='relu',
activity_regularizer=regularizers.l2(0.001)))
#model.add(Dense(4096 , activation='relu'))
model.add(
Dense(n_clasif,
activation='linear',
activity_regularizer=regularizers.l2(0.001)))
model.summary()
# Compile the model
model.compile(
loss=losses.categorical_crossentropy(from_logits=True),
optimizer=optimizers.Adam(
learning_rate=0.001), #optimizers.SGD(lr=0.03),
metrics=[metrics.CategoricalAccuracy('acc')])
return model
def build_model(self,
embedding_size=EMBEDDING_SIZE,
input_length=MAX_DOCUMENT_LENGTH,
link_embedding_size=LINK_EMBEDDING_SIZE,
link_input_length=LINK_INPUT_LENGTH):
he_inputs = keras.Input(shape=(input_length, ), name="hebrew")
en_inputs = keras.Input(shape=(input_length, ), name="english")
link_inputs = keras.Input(shape=(link_input_length, ), name="links")
assert getattr(
self, 'he_embed_model', None
) is not None, "CnnClfEnsemble.load_all_embedding_models() needs to be called before calling build_model()"
he_embed = self.he_embed_model(he_inputs)
en_embed = self.en_embed_model(en_inputs)
link_embed = self.link_embed_model(link_inputs)
self.model_head = self.get_model_head()
outputs = self.model_head([he_embed, en_embed, link_embed])
self.model = keras.Model(inputs=[he_inputs, en_inputs, link_inputs],
outputs=outputs)
self.model.compile(
optimizer=optimizers.Adam(), #learning_rate=0.001),
loss=losses.CategoricalCrossentropy(from_logits=False),
metrics=[
metrics.CategoricalAccuracy(),
metrics.Recall(class_id=0),
metrics.Precision(class_id=0)
])
def test_evaluate(test_config):
#Create class
mod = main.AttentionModel()
#Replace config for testing env
for key, value in test_config.items():
for nested_key, nested_value in value.items():
mod.config[key][nested_key] = nested_value
#Create
mod.create()
mod.read_data(validation_split=True)
#Method 1, class eval method
print("Before evaluation")
y_pred, y_true = mod.evaluate(mod.val_split)
print("evaluated")
test_acc = keras_metrics.CategoricalAccuracy()
test_acc.update_state(y_true=y_true, y_pred=y_pred)
method1_eval_accuracy = test_acc.result().numpy()
assert y_pred.shape == y_true.shape
#Method 2, keras eval method
metric_list = mod.model.evaluate(mod.val_split)
metric_dict = {}
for index, value in enumerate(metric_list):
metric_dict[mod.model.metrics_names[index]] = value
assert method1_eval_accuracy == metric_dict["acc"]
#F1 requires integer, not softmax
f1s = metrics.f1_scores(y_true, y_pred)
def create_models(height, width, channels, classes, learning_rate, weighted_sum=True):
#Define model structure
sensor_inputs, sensor_outputs, spatial_attention_outputs, spectral_attention_outputs = define_model(
height = height,
width = width,
channels = channels,
classes = classes,
weighted_sum=weighted_sum, softmax=True)
#Full model compile
model = tf.keras.Model(inputs=sensor_inputs,
outputs=sensor_outputs,
name="DeepTreeAttention")
#compile full model
metric_list = [metrics.CategoricalAccuracy(name="acc")]
model.compile(loss="categorical_crossentropy",
optimizer=tf.keras.optimizers.Adam(
lr=float(learning_rate)),
metrics=metric_list)
#compile
loss_dict = {
"spatial_attention_1": "categorical_crossentropy",
"spatial_attention_2": "categorical_crossentropy",
"spatial_attention_3": "categorical_crossentropy"
}
# Spatial Attention softmax model
spatial_model = tf.keras.Model(inputs=sensor_inputs,
outputs=spatial_attention_outputs,
name="DeepTreeAttention")
spatial_model.compile(
loss=loss_dict,
loss_weights=[0.01, 0.1, 1],
optimizer=tf.keras.optimizers.Adam(
lr=float(learning_rate)),
metrics=metric_list)
# Spectral Attention softmax model
spectral_model = tf.keras.Model(inputs=sensor_inputs,
outputs=spectral_attention_outputs,
name="DeepTreeAttention")
#compile loss dict
loss_dict = {
"spectral_attention_1": "categorical_crossentropy",
"spectral_attention_2": "categorical_crossentropy",
"spectral_attention_3": "categorical_crossentropy"
}
spectral_model.compile(
loss=loss_dict,
loss_weights=[0.01, 0.1, 1],
optimizer=tf.keras.optimizers.Adam(
lr=float(learning_rate)),
metrics=metric_list)
return model, spatial_model, spectral_model
def eval_use_model(model_name, path_model_file, test_file, class_num):
"""
evaluating model by using entire model (weights, architecture, optimizers, etc.)
Arguments:\n
model_name --> String, Resnet50/Resnet18/VGG16/VGG19
path_model_file --> String, path which store .hdf5 of model's weight\n
test_file --> String, path to which store .h5 file of test dataset
class_num --> Int, number of class/label\n
Returns:\n
none
"""
# Load model weights
new_model = Model()
new_model = load_model(path_model_file)
new_model.compile(optimizer='adam',
loss='categorical_crossentropy',
metrics=[
metrics.AUC(),
metrics.CategoricalAccuracy(),
metrics.TruePositives(),
metrics.TrueNegatives(),
metrics.FalsePositives(),
metrics.FalseNegatives()
])
# retrieve X_test, Y_test
X_test, Y_test = retrieve_test_dataset(test_file, int(class_num))
for i in range(4):
hasil = new_model.evaluate(X_test, Y_test)
print(new_model.metrics_names)
print(hasil)
def train(opts, model):
task_opts = opts['task']
sess_opts = opts['session']
# Optimizer and criterion.
opt = optimizers.SGD(learning_rate=0.1)
crit = losses.BinaryCrossentropy()
# Accuracy metric.
train_acc = metrics.CategoricalAccuracy(name='train_acc')
# Generate batch for selected task.
src, tgt = Task.generate_batch(task_opts, sess_opts.batch_size)
for epoch in range(sess_opts.epochs):
train_acc.reset_states()
p, loss = train_step(model, src, tgt, crit, opt)
train_acc(tgt, p)
if epoch % 500 == 0:
fig, ax = plt.subplots(2, 1)
ax[0].imshow(src[0].T)
ax[1].imshow(p.numpy()[0].T)
plt.show()
print(f'Epoch {epoch + 1}, '
f'Loss: {loss}, '
f'Accuracy: {train_acc.result() * 100} ')
def test_eval(model, test_df, y_test):
test_data = BertPreprocessing(
test_df[["sentence1", "sentence2"]].values.astype("str"),
y_test,
batch_size=config.batch_size,
shuffle=False,
)
y_pred = model.predict(test_data)
size = y_pred.shape[0]
y_test = y_test[:size, :]
accuracy = metrics.CategoricalAccuracy()
accuracy.update_state(y_test, y_pred)
precision = metrics.Precision()
precision.update_state(y_test, y_pred)
recall = metrics.Recall()
recall.update_state(y_test, y_pred)
f1 = tfa.metrics.F1Score(num_classes=3, average="macro")
f1.update_state(y_test, y_pred)
auc = metrics.AUC()
auc.update_state(y_test, y_pred)
print(f"""
Accuracy: {accuracy.result().numpy()}
Precision: {precision.result().numpy()}
Recall: {recall.result().numpy()}
F1 score: {f1.result().numpy()}
AUC: {auc.result().numpy()}
""")
def train_network(training_set, training_labels, save_path='network.keras'):
global model
print('----TRAINING----')
model = Sequential([
Flatten(input_shape=training_set[0].shape),
Dense(256, activation='relu'),
Dense(64, activation='relu'),
Dense(10, activation='softmax'),
])
model_metrics = [
metrics.CategoricalAccuracy(),
metrics.Recall(),
metrics.AUC(),
metrics.SensitivityAtSpecificity(.8),
metrics.SpecificityAtSensitivity(.8), f1_score, fbeta_score
]
model.compile(optimizer='adam',
loss='categorical_crossentropy',
metrics=model_metrics)
print(model.summary())
train_time = time.time_ns()
history = model.fit(training_set,
training_labels,
epochs=2,
batch_size=32,
validation_split=0)
print((time.time_ns() - train_time) / 1000000)
print(str(history.history['loss'])[1:-1].replace(',', ''))
print(str(history.history['categorical_accuracy'])[1:-1].replace(',', ''))
model.save(save_path)
def ejer3_imagenet(n_epochs):
input_image = Input(shape=(32, 32, 3))
(x_train, y_train), (x_test, y_test) = cifar10.load_data()
x_train, y_train = preprocessing(x_train, y_train)
x_test, y_test = preprocessing(x_test, y_test)
model_keras = MobileNet(include_top=False,
weights="imagenet",
input_tensor=input_image)
#model_keras.trainable = False
model = Sequential()
model.add(model_keras)
model.add(Flatten())
model.add(Dropout(0.1))
model.add(BatchNormalization())
model.add(Dense(10, activation='softmax'))
model.compile(loss=losses.CategoricalCrossentropy(),
optimizer=optimizers.Adam(learning_rate=0.00001),
metrics=[metrics.CategoricalAccuracy('acc')])
model.summary()
history = model.fit(x_train,
y_train,
validation_data=(x_test, y_test),
batch_size=50,
epochs=n_epochs,
verbose=1)
acc, val_acc, loss, val_loss = plot_ejercicio(history)
np.savetxt("ejer3{}epochs{}_mobilenet.txt".format("_imagenet_", n_epochs),
np.array([acc, val_acc, loss, val_loss]).T)
def run_gradient_tape():
model = Sequential([
layers.Reshape(target_shape=(28 * 28, ), input_shape=(28, 28)),
layers.Dense(256, activation='relu'),
layers.Dense(256, activation='relu'),
layers.Dense(256, activation='relu'),
layers.Dense(10)
])
# model.build(input_shape=(None, 28*28))
model.summary()
optim = optimizers.Adam(lr=0.001)
accu = metrics.CategoricalAccuracy()
for step, (x, y) in enumerate(train_db):
with tf.GradientTape() as tape:
out = model(x)
loss = tf.square(out - y)
loss = tf.reduce_sum(loss) / 32
accu.update_state(y, out)
grads = tape.gradient(loss, model.trainable_variables)
optim.apply_gradients(zip(grads, model.trainable_variables))
if step % 200 == 0:
print(step, 'Loss:', float(loss), '- Accu:', accu.result().numpy())
accu.reset_states()
def test_register_from_metrics():
# As well as direction inference.
tracker = metrics_tracking.MetricsTracker(
metrics=[metrics.CategoricalAccuracy(),
metrics.MeanSquaredError()])
assert tracker.names == ['categorical_accuracy', 'mean_squared_error']
assert tracker.directions['categorical_accuracy'] == 'max'
assert tracker.directions['mean_squared_error'] == 'min'
def evaluate(x_test, y_test):
model = keras.models.load_model(WEIGHTS_PATH)
model.compile(loss='categorical_crossentropy',
metrics=[metrics.CategoricalAccuracy(), metrics.Precision(), metrics.Recall()])
loss, accuracy, precision, recall = model.evaluate(x_test, y_test, verbose=1)
F1_Score = 2 * (precision * recall) / (precision + recall)
print('loss:%.4f accuracy:%.4f precision:%.4f recall:%.4f F1_Score:%.4f'
% (loss, accuracy, precision, recall, F1_Score))
def test_evaluate(test_config):
#Create class
mod = Houston2018.AttentionModel(config="conf/houston_config.yml")
#Replace config for testing env
for key, value in test_config.items():
for nested_key, nested_value in value.items():
mod.config[key][nested_key] = nested_value
#Create
mod.create()
mod.read_data(validation_split=True)
metric_list = [
keras_metrics.TopKCategoricalAccuracy(k=2, name="top_k"),
keras_metrics.CategoricalAccuracy(name="acc")
]
mod.model.compile(loss="categorical_crossentropy",
optimizer=tf.keras.optimizers.Adam(
lr=float(mod.config['train']['learning_rate'])),
metrics=metric_list)
#Method 1, class eval method
print("Before evaluation")
y_pred, y_true = mod.evaluate(mod.val_split)
print("evaluated")
test_acc = keras_metrics.CategoricalAccuracy()
test_acc.update_state(y_true=y_true, y_pred=y_pred)
method1_eval_accuracy = test_acc.result().numpy()
assert y_pred.shape == y_true.shape
#Method 2, keras eval method
metric_list = mod.model.evaluate(mod.val_split)
metric_dict = {}
for index, value in enumerate(metric_list):
metric_dict[mod.model.metrics_names[index]] = value
assert method1_eval_accuracy == metric_dict["acc"]
#F1 requires integer, not softmax
f1s = metrics.f1_scores(y_true, y_pred)
def test_register_from_metrics():
# As well as direction inference.
tracker = metric.MetricsTracker(
metrics=[metrics.CategoricalAccuracy(),
metrics.MeanSquaredError()])
assert set(tracker.metrics.keys()) == {
'categorical_accuracy', 'mean_squared_error'
}
assert tracker.metrics['categorical_accuracy'].direction == 'max'
assert tracker.metrics['mean_squared_error'].direction == 'min'
def test_register_from_metrics():
# As well as direction inference.
tracker = metrics_tracking.MetricsTracker(
metrics=[metrics.CategoricalAccuracy(), metrics.MeanSquaredError()]
)
assert set(tracker.metrics.keys()) == {
"categorical_accuracy",
"mean_squared_error",
}
assert tracker.metrics["categorical_accuracy"].direction == "max"
assert tracker.metrics["mean_squared_error"].direction == "min"
def initialize_model(self):
input = layers.Input(shape=(self.timestep_num, self.channel_num))
L1 = layers.GRU(self.__RNN1_UnitNum, return_sequences=True)(input)
L2 = layers.Dense(self.__Dense_UnitNum, activation='tanh')(L1)
L3 = layers.GRU(self.__RNN2_UnitNum, return_sequences=True)(L2)
output = layers.Dense(self.class_num, activation='softmax')(L3)
self.model = models.Model(input, output)
self.model.compile(
optimizer=optimizers.Adam(),
loss=losses.CategoricalCrossentropy(),
metrics=[metrics.CategoricalAccuracy()],
)
def classifier_train(classifier_model, train_images_code, train_labels, hyperparams):
classifier_model.compile(loss=losses.CategoricalCrossentropy(),
optimizer="RMSprop", metrics=[metrics.CategoricalAccuracy()])
train_X, test_X, train_ground, test_ground = train_test_split(train_images_code, train_labels,
test_size=0.2)
train_hist = classifier_model.fit(train_X, train_ground, batch_size=hyperparams.batch_size,verbose=1,
epochs=hyperparams.epochs, validation_data=(test_X, test_ground))
return classifier_model, train_hist
def build_simple_model(dataset='Fashion Mnist',
opt='sgd',
hidden=None,
funcs=None,
loss=None,
metrics_list=None):
model = models.Sequential()
if dataset == 'CIFAR-10':
model.add(layers.Flatten(input_shape=[32, 32, 3]))
elif ('Fashion Mnist'):
model.add(layers.Flatten(input_shape=[28, 28]))
for i in hidden.keys():
model.add(layers.Dense(hidden[i], activation=funcs[i].lower()))
model.add(layers.Dense(10, activation="softmax"))
loss_dict = {
'Categorical Crossentropy': 'categorical_crossentropy',
'Binary Crossentropy': 'binary_crossentropy',
'Categorical Hinge': 'categorical_hinge',
'Huber loss': 'huber_loss'
}
metrics_dict = {
'auc':
metrics.AUC(),
'recall':
metrics.Recall(),
'accuracy':
metrics.CategoricalAccuracy()
if loss.startswith('Categorical') else metrics.Accuracy(),
'precision':
metrics.Precision(),
'categorical Hinge':
metrics.CategoricalHinge(),
'squared Hinge':
metrics.SquaredHinge(),
'Kullback-Leibler divergence':
metrics.KLDivergence(),
'mean absolute error':
metrics.MeanAbsoluteError(),
'mean squared error':
metrics.MeanSquaredError()
}
if metrics_list is not None and len(metrics_list) > 0:
metrics_list = [metrics_dict.get(m, m) for m in metrics_list]
else:
metrics_list = ['accuracy']
loss_f = loss_dict.get(loss)
model.compile(loss=loss_f, optimizer=opt, metrics=metrics_list)
return model
def main():
raw_dataset=tf.data.TFRecordDataset(train_filenames)
raw_dataset=raw_dataset.take(720000)
feat_desc={
'bcateid':tf.io.FixedLenFeature([],tf.int64),
'mcateid':tf.io.FixedLenFeature([],tf.int64),
'scateid':tf.io.FixedLenFeature([],tf.int64),
'dcateid':tf.io.FixedLenFeature([],tf.int64),
'pieces':tf.io.FixedLenFeature([20],tf.int64)
}
def _parse_function(example_proto):
parsed = tf.io.parse_single_example(example_proto,feat_desc)
output={}
output['bcateid']=parsed.pop('bcateid')
output['mcateid']=parsed.pop('mcateid')
output['scateid']=parsed.pop('scateid')
output['dcateid']=parsed.pop('dcateid')
return (parsed,output)
dataset=raw_dataset.map(_parse_function)
dataset=dataset.shuffle(1024)
dataset=dataset.batch(40,True)
encoder=get_encoder(700,8000)
keras.utils.plot_model(encoder,'text_clf_gru.png',show_shapes=True)
encoder.compile(
optimizer=optimizers.Adam(),
loss={
'bcateid':loss_fn,
'mcateid':loss_fn,
'scateid':loss_fn_many,
'dcateid':loss_fn_many
},
metrics=[metrics.CategoricalAccuracy()])
callbacks=[
keras.callbacks.ModelCheckpoint(
filepath='train10/spmodel_{epoch}.ckpt',
save_weights_only=True,
verbose=1
)
]
encoder.fit(dataset,epochs=3,callbacks=callbacks)
def __get_metric(self, metric):
if metric == "auc":
return m.AUC()
elif metric == "accuracy":
return m.Accuracy()
elif metric == "binary_accuracy":
return m.BinaryAccuracy()
elif metric == "categorical_accuracy":
return m.CategoricalAccuracy()
elif metric == "binary_crossentropy":
return m.BinaryCrossentropy()
elif metric == "categorical_crossentropy":
return m.CategoricalCrossentropy()
elif metric == "sparse_categorical_crossentropy":
return m.SparseCategoricalCrossentropy()
elif metric == "kl_divergence":
return m.KLDivergence()
elif metric == "poisson":
return m.Poission()
elif metric == "mse":
return m.MeanSquaredError()
elif metric == "rmse":
return m.RootMeanSquaredError()
elif metric == "mae":
return m.MeanAbsoluteError()
elif metric == "mean_absolute_percentage_error":
return m.MeanAbsolutePercentageError()
elif metric == "mean_squared_logarithm_error":
return m.MeanSquaredLogarithmError()
elif metric == "cosine_similarity":
return m.CosineSimilarity()
elif metric == "log_cosh_error":
return m.LogCoshError()
elif metric == "precision":
return m.Precision()
elif metric == "recall":
return m.Recall()
elif metric == "true_positive":
return m.TruePositives()
elif metric == "true_negative":
return m.TrueNegatives()
elif metric == "false_positive":
return m.FalsePositives()
elif metric == "false_negative":
return m.FalseNegatives()
else:
raise Exception("specified metric not defined")
def merged_modeltrain(encoder,classifier_model, train_images, train_labels):
merged_model = merge_models(encoder, classifier_model)
merged_model.compile(loss=losses.CategoricalCrossentropy(),
optimizer="RMSprop", metrics=[metrics.CategoricalAccuracy()])
#print(merged_model.summary())
train_X, test_X, train_ground, test_ground = train_test_split(train_images, train_labels,
test_size=0.2)
print("For merged model:")
epochs = input_fns.input_epochs()
batch_size = input_fns.input_batch_size()
train_hist = merged_model.fit(train_X, train_ground, batch_size=batch_size,verbose=1,
epochs=epochs, validation_data=(test_X, test_ground))
return merged_model, train_hist
def train(model, x_train, y_train):
"""
Train the target model and save the weight of the model
:param model: the model that will be trained
:param x_train: the image as numpy format
:param y_train: the label for x_train
:param weights_path: path to save the model file
:return: None
"""
model.compile(loss='categorical_crossentropy',
optimizer=keras.optimizers.Adam(lr=5e-5),
metrics=[metrics.CategoricalAccuracy(), metrics.Precision(), metrics.Recall()])
model.fit(x_train,
y_train,
batch_size=BATCH_SIZE,
epochs=EPOCHS)
model.save(WEIGHTS_PATH)
def __init__(self,
epochs,
batch_size,
n_classes,
create_dir_bool=True,
verbose=2):
print("########## Init NN ##########")
self.metrics = [tkm.CategoricalAccuracy(name='ACC')]
self.n_classes = n_classes
self.exp_desc = ""
self.verbose = verbose
self.epochs = epochs
self.batch_size = batch_size
self.date = datetime.now().strftime("%d-%m_%H%M%S")
if (create_dir_bool):
create_dir(self.date)
def load_simple_model(model_path='',
weights_path='',
opt='sgd',
loss=None,
metrics_list=None):
model = models.load_model(model_path)
model.load_weights(weights_path)
loss_dict = {
'Categorical Crossentropy': 'categorical_crossentropy',
'Binary Crossentropy': 'binary_crossentropy',
'Categorical Hinge': 'categorical_hinge',
'Huber loss': 'huber_loss'
}
metrics_dict = {
'auc':
metrics.AUC(),
'recall':
metrics.Recall(),
'accuracy':
metrics.CategoricalAccuracy()
if loss.startswith('Categorical') else metrics.Accuracy(),
'precision':
metrics.Precision(),
'categorical Hinge':
metrics.CategoricalHinge(),
'squared Hinge':
metrics.SquaredHinge(),
'Kullback-Leibler divergence':
metrics.KLDivergence(),
'mean absolute error':
metrics.MeanAbsoluteError(),
'mean squared error':
metrics.MeanSquaredError()
}
if metrics_list is not None and len(metrics_list) > 0:
metrics_list = [metrics_dict.get(m, m) for m in metrics_list]
else:
metrics_list = ['accuracy']
loss_f = loss_dict.get(loss)
model.compile(loss=loss_f, optimizer=opt, metrics=metrics_list)
return model
def create(self, name="Hang2020",weights=None, submodel=None):
"""Load a model
Args:
weights: a saved model weights from previous run
name: a model name from DeepTreeAttention.models
"""
self.model = self.get_model(name)
if weights:
self.model.load_weights(weights)
#metrics
metric_list = [
metrics.TopKCategoricalAccuracy(k=2, name="top_k"),
metrics.CategoricalAccuracy(name="acc")]
#compile
self.model.compile(loss="categorical_crossentropy",
optimizer=tf.keras.optimizers.Adam(
lr=float(self.config['train']['learning_rate'])),
metrics=metric_list)
def create_compiled_keras_model():
optimizer = SGD(lr=0.02,
decay=1e-6,
momentum=0.9,
nesterov=True,
clipnorm=5)
'''
model = classification_model(input_dim = (99, 161),
filters = 256,
kernel_size = 1,
strides = 1,
padding = 'valid',
output_dim = 4)
'''
model = createNaiveModel(input_dim=(99, 161, 1), strides=2, output_dim=4)
#model = add_categorical_loss(model, 4)
# the keras classification model
#model.compile(loss=tf.keras.losses.SparseCategoricalCrossentropy(),optimizer=tf.keras.optimizers.SGD(learning_rate=0.02),metrics=[tf.keras.metrics.SparseCategoricalAccuracy()])
#model.compile(loss = {'categorical_crossentropy' : lambda y_true, y_pred : y_pred}, optimizer = optimizer)
model.compile(loss='categorical_crossentropy',
optimizer=optimizer,
metrics=[metrics.CategoricalAccuracy()])
return model
x_train = (x_train.reshape(-1, 784) / 255).astype(np.float32)
x_test = (x_test.reshape(-1, 784) / 255).astype(np.float32)
t_train = np.eye(10)[t_train].astype(np.float32)
t_test = np.eye(10)[t_test].astype(np.float32)
'''
2. モデルの構築
'''
model = DNN(200, 10)
'''
3. モデルの学習
'''
criterion = losses.CategoricalCrossentropy()
optimizer = optimizers.SGD(learning_rate=0.01)
train_loss = metrics.Mean()
train_acc = metrics.CategoricalAccuracy()
def compute_loss(t, y):
return criterion(t, y)
def train_step(x, t):
with tf.GradientTape() as tape:
preds = model(x)
loss = compute_loss(t, preds)
grads = tape.gradient(loss, model.trainable_variables)
optimizer.apply_gradients(zip(grads, model.trainable_variables))
train_loss(loss)
train_acc(t, preds)
return loss
