def eval(config):
# Files path
model_file_path = f"{config['model.path']}"
data = load(config, datagen_flow=True)
# Determine device
if config['data.cuda']:
cuda_num = config['data.gpu']
device_name = f'GPU:{cuda_num}'
else:
device_name = 'CPU:0'
if config['data.weight_classes']:
loss_object = tf.keras.losses.SparseCategoricalCrossentropy()
loss_object = weighted_loss(loss_object, data["class_weights"])
else:
loss_object = tf.keras.losses.SparseCategoricalCrossentropy()
optimizer = tf.keras.optimizers.Adam()
model = create_model(
model_name=config['model.name'],
weights=config['model.weights'],
nb_classes=data["nb_classes"],
image_shape=data["image_shape"],
optimizer=optimizer,
loss_object=loss_object,
)
model.load_weights(model_file_path)
# model.summary()
train_loss = tf.keras.metrics.Mean(name='train_loss')
train_accuracy = tf.keras.metrics.SparseCategoricalAccuracy(
name='train_accuracy')
test_loss = tf.keras.metrics.Mean(name='test_loss')
test_accuracy = tf.keras.metrics.SparseCategoricalAccuracy(
name='test_accuracy')
_, _, test_step = steps(model,
loss_object,
optimizer,
train_loss=train_loss,
train_accuracy=train_accuracy,
test_loss=test_loss,
test_accuracy=test_accuracy,
engine=config['engine'])
with tf.device(device_name):
batches = 0
for test_images, test_labels in data["test_gen"]:
test_step(test_images, test_labels)
batches += 1
if batches >= data["test_size"] / config['data.batch_size']:
# we need to break the loop by hand because
# the generator loops indefinitely
break
print('Test Loss: {} Test Acc: {}'.format(test_loss.result(),
test_accuracy.result() * 100))
def eval(config):
# Files path
model_file = config['model.path']
data_dir = "data/"
_, test_features, _ = load(data_dir, config, use_feature_transform=True)
model = tf.keras.models.load_model(model_file)
model.summary()
if config['model.weights_save_path'] != "":
model.save_weights(config['model.weights_save_path'])
if config['model.json_save_path'] != "":
tfjs.converters.save_keras_model(model, config['model.json_save_path'])
predictions = tf.round(model.predict(test_features)).numpy().flatten()
print(predictions)
def eval(config):
# Files path
model_file = config['model.path']
data_dir = "data/"
_, X, y = load(data_dir, config, numeric=True)
model = tf.keras.models.load_model(model_file)
model.summary()
if config['model.weights_save_path'] != "":
model.save_weights(config['model.weights_save_path'])
if config['model.json_save_path'] != "":
tfjs.converters.save_keras_model(model, config['model.json_save_path'])
predictions = tf.round(model.predict(X)).numpy().flatten()
print('Results for Binary Model')
print(accuracy_score(y, predictions))
print(classification_report(y, predictions))
def eval(config):
# Files path
model_file_path = f"{config['model.path']}"
data_dir = f"data/"
_, _, test, nb_classes, image_shape, class_weights = load(
dataset_name=config['data.dataset'],
batch_size=config['data.batch_size'],
train_size=config['data.train_size'],
test_size=config['data.test_size'],
weight_classes=config['data.weight_classes'],
datagen_flow=True,
)
(test_gen, test_len, _) = test
# Determine device
if config['data.cuda']:
cuda_num = config['data.gpu']
device_name = f'GPU:{cuda_num}'
else:
device_name = 'CPU:0'
if config['data.weight_classes']:
loss_object = tf.keras.losses.SparseCategoricalCrossentropy()
loss_object = weightedLoss(loss_object, class_weights)
else:
loss_object = tf.keras.losses.SparseCategoricalCrossentropy()
optimizer = tf.keras.optimizers.Adam()
model = densenet_model(classes=nb_classes,
shape=image_shape,
growth_rate=config['model.growth_rate'],
nb_layers=config['model.nb_layers'],
reduction=config['model.reduction'])
model.load_weights(model_file_path)
model.summary()
test_loss = tf.keras.metrics.Mean(name='test_loss')
test_accuracy = tf.keras.metrics.SparseCategoricalAccuracy(
name='test_accuracy')
_, test_step = steps(model,
loss_object,
optimizer,
test_loss=test_loss,
test_accuracy=test_accuracy)
print("Starting evaluation")
batches = 0
for test_images, test_labels in test_gen:
test_step(test_images, test_labels)
batches += 1
if batches >= test_len / config['data.batch_size']:
# we need to break the loop by hand because
# the generator loops indefinitely
break
print('Test Loss: {} Test Acc: {}'.format(test_loss.result(),
test_accuracy.result() * 100))
def train(config):
np.random.seed(2020)
tf.random.set_seed(2020)
# Useful data
now = datetime.now()
now_as_str = now.strftime('%y_%m_%d-%H:%M:%S')
# Output files
checkpoint_path = config['model.save_path']
config_path = config['output.config_path'].format(date=now_as_str)
csv_output_path = config['output.train_path'].format(date=now_as_str)
tensorboard_summary_dir = config['summary.save_path']
summary_path = "results/summary.csv"
# Output dirs
data_dir = "data/"
config_dir = config_path[:config_path.rfind('/')]
output_dir = csv_output_path[:csv_output_path.rfind('/')]
# Create folder for config
if not os.path.exists(config_dir):
os.makedirs(config_dir)
if not os.path.exists(output_dir):
os.makedirs(output_dir)
# generate config file
file = open(config_path, 'w')
file.write(json.dumps(config, indent=2))
file.close()
file = open(csv_output_path, 'w')
file.write("")
file.close()
# create summary file if not exists
if not os.path.exists(summary_path):
file = open(summary_path, 'w')
file.write("datetime, model, config, acc_std, acc_mean\n")
file.close()
# Data loader
if not os.path.exists(data_dir):
os.makedirs(data_dir)
_, X, y = load(data_dir, config, numeric=True)
# Defines datasets on the input data.
batch_size = config['data.batch_size']
# Determine device
if config['data.cuda']:
cuda_num = config['data.gpu']
device_name = f'GPU:{cuda_num}'
else:
device_name = 'CPU:0'
time_start = time.time()
# define 10-fold cross validation test harness
skf = StratifiedKFold(n_splits=10, shuffle=True, random_state=42)
cvscores = []
print("Running model performance validation... please wait!")
for split, (train_index, test_index) in enumerate(skf.split(X, y)):
X_train, X_test = X[train_index], X[test_index]
y_train, y_test = y[train_index], y[test_index]
# Compiles a model, prints the model summary, and saves the model diagram into a png file.
input_shape = (X_train.shape[1], )
model = create_model(input_shape=input_shape,
learning_rate=config['train.lr'])
model.summary()
split_checkpoint_path = checkpoint_path.format(split=split)
split_results_path = csv_output_path.format(split=split)
split_checkpoint_dir = split_checkpoint_path[:split_checkpoint_path.
rfind('/')]
split_results_dir = split_results_path[:split_results_path.rfind('/')]
# Create folder for model
if not os.path.exists(split_checkpoint_dir):
os.makedirs(split_checkpoint_dir)
# Create output for train process
if not os.path.exists(split_results_dir):
os.makedirs(split_results_dir)
tf.keras.utils.plot_model(model,
os.path.join(split_results_dir,
"keras_model.png"),
show_shapes=True,
show_layer_names=False)
callbacks = create_callbacks(
tensorboard_summary_dir.format(split=split),
split_results_path,
split_checkpoint_path,
patience=config['train.patience'])
# Fit the model
with tf.device(device_name):
history = model.fit(X_train,
y_train,
validation_split=0.1,
epochs=config['train.epochs'],
batch_size=config['data.batch_size'],
use_multiprocessing=True,
callbacks=callbacks)
# evaluate the model
scores = model.evaluate(X_test, y_test, verbose=0)
print("%s: %.2f%%" % (model.metrics_names[1], scores[1] * 100))
cvscores.append(scores[1] * 100)
# Runs prediction on test data.
predictions = tf.round(model.predict(X_test)).numpy().flatten()
print("Predictions on test data:")
print(predictions)
model_path = tf.train.latest_checkpoint(
split_checkpoint_dir, latest_filename=split_checkpoint_path)
if not model_path:
print("Skipping evaluation. No checkpoint found in: {}".format(
split_checkpoint_dir))
else:
model_from_saved = tf.keras.models.load_model(model_path)
model_from_saved.summary()
# Runs test data through the reloaded model to make sure the results are same.
predictions_from_saved = tf.round(
model_from_saved.predict(X_test)).numpy().flatten()
np.testing.assert_array_equal(predictions_from_saved, predictions)
print("Done.")
print("Summary report on mean and std.")
# The average and standard deviation of the model performance
print("%.2f%% (+/- %.2f%%)" % (np.mean(cvscores), np.std(cvscores)))
time_end = time.time()
summary = "{}, {}, df, {}, {}, {}\n".format(now_as_str,
config['data.dataset'],
config_path, np.std(cvscores),
np.mean(cvscores))
print(summary)
print(cvscores)
file = open(summary_path, 'a+')
file.write(summary)
file.close()
elapsed = time_end - time_start
h, min = elapsed // 3600, elapsed % 3600 // 60
sec = elapsed - min * 60
print(f"Training took: {h:.2f}h {min:.2f}m {sec:.2f}s!")
def train(config):
data = load(config,
datagen_flow=True,
with_datasets=config['engine'] == 'maml')
# Determine device
if config['data.cuda']:
cuda_num = config['data.gpu']
device_name = f'GPU:{cuda_num}'
else:
device_name = 'CPU:0'
if config['data.weight_classes']:
loss_object = tf.keras.losses.SparseCategoricalCrossentropy()
loss_object = weighted_loss(loss_object, data["class_weights"])
else:
loss_object = tf.keras.losses.SparseCategoricalCrossentropy()
optimizer = tf.keras.optimizers.Adam()
time_start = time.time()
# Compiles a model, prints the model summary, and saves the model diagram into a png file.
model = densenet_model(classes=data["nb_classes"],
shape=data["image_shape"],
growth_rate=config['model.growth_rate'],
nb_layers=config['model.nb_layers'],
reduction=config['model.reduction'])
# model.summary()
train_loss = tf.keras.metrics.Mean(name='train_loss')
train_accuracy = tf.keras.metrics.SparseCategoricalAccuracy(
name='train_accuracy')
val_loss = tf.keras.metrics.Mean(name='val_loss')
val_accuracy = tf.keras.metrics.SparseCategoricalAccuracy(
name='val_accuracy')
with tf.device(device_name):
train_engine.train(
log_info=config,
model=model,
batch_size=config['data.batch_size'],
epochs=config['train.epochs'],
max_patience=config['train.patience'],
engine=config['engine'],
lr=config['train.lr'],
train_loss=train_loss,
train_accuracy=train_accuracy,
test_loss=val_loss,
test_accuracy=val_accuracy,
val_loss=val_loss,
val_accuracy=val_accuracy,
optimizer=optimizer,
loss_object=loss_object,
**data,
)
time_end = time.time()
elapsed = time_end - time_start
h, min = elapsed // 3600, elapsed % 3600 // 60
sec = elapsed - min * 60
print(f"Training took: {h:.2f}h {min:.2f}m {sec:.2f}s!")
def train(config):
np.random.seed(2020)
tf.random.set_seed(2020)
# Useful data
now = datetime.now()
now_as_str = now.strftime('%y_%m_%d-%H:%M:%S')
# Output files
checkpoint_path = f"{config['model.save_path']}"
config_path = f"{config['output.config_path'].format(now_as_str)}"
csv_output_path = f"{config['output.train_path'].format(now_as_str)}"
train_summary_file_path = f"{config['summary.save_path'].format('train', config['data.dataset'], config['model.name'], config['model.type'], now_as_str)}"
test_summary_file_path = f"{config['summary.save_path'].format('test', config['data.dataset'], config['model.name'], config['model.type'], now_as_str)}"
summary_path = f"results/summary.csv"
# Output dirs
data_dir = f"data/"
checkpoint_dir = checkpoint_path[:checkpoint_path.rfind('/')]
config_dir = config_path[:config_path.rfind('/')]
results_dir = csv_output_path[:csv_output_path.rfind('/')]
# Create folder for model
if not os.path.exists(checkpoint_dir):
os.makedirs(checkpoint_dir)
# Create output for train process
if not os.path.exists(results_dir):
os.makedirs(results_dir)
file = open(f"{csv_output_path}", 'w')
file.write("")
file.close()
# Create folder for config
if not os.path.exists(config_dir):
os.makedirs(config_dir)
# generate config file
file = open(config_path, 'w')
file.write(json.dumps(config, indent=2))
file.close()
# create summary file if not exists
if not os.path.exists(summary_path):
file = open(summary_path, 'w')
file.write("datetime, model, config, min_loss, min_loss_accuracy\n")
file.close()
# Data loader
if not os.path.exists(data_dir):
os.makedirs(data_dir)
train, val, _, nb_classes, image_shape, class_weights = load(
dataset_name=config['data.dataset'],
dataset_dir=config['data.dataset_dir'],
batch_size=config['data.batch_size'],
train_size=config['data.train_size'],
test_size=config['data.test_size'],
weight_classes=config['data.weight_classes'],
rotation_range=config['data.rotation_range'],
width_shift_range=config['data.width_shift_range'],
height_shift_range=config['data.height_shift_range'],
horizontal_flip=config['data.horizontal_flip'],
datagen_flow=True,
)
(train_gen, train_len, _) = train
(val_gen, val_len, _) = val
# Determine device
if config['data.cuda']:
cuda_num = config['data.gpu']
device_name = f'GPU:{cuda_num}'
else:
device_name = 'CPU:0'
if config['data.weight_classes']:
loss_object = tf.keras.losses.SparseCategoricalCrossentropy()
loss_object = weightedLoss(loss_object, class_weights)
else:
loss_object = tf.keras.losses.SparseCategoricalCrossentropy()
optimizer = tf.keras.optimizers.Adam()
time_start = time.time()
# Compiles a model, prints the model summary, and saves the model diagram into a png file.
model = densenet_model(classes=nb_classes,
shape=image_shape,
growth_rate=config['model.growth_rate'],
nb_layers=config['model.nb_layers'],
reduction=config['model.reduction'])
model.summary()
tf.keras.utils.plot_model(model,
"{}/model.png".format(results_dir),
show_shapes=True)
train_loss = tf.keras.metrics.Mean(name='train_loss')
train_accuracy = tf.keras.metrics.SparseCategoricalAccuracy(
name='train_accuracy')
val_loss = tf.keras.metrics.Mean(name='val_loss')
val_accuracy = tf.keras.metrics.SparseCategoricalAccuracy(
name='val_accuracy')
train_step, test_step = steps(model, loss_object, optimizer, train_loss,
train_accuracy, val_loss, val_accuracy)
# create summary writers
train_summary_writer = tf.summary.create_file_writer(
train_summary_file_path)
val_summary_writer = tf.summary.create_file_writer(test_summary_file_path)
print("Starting training")
loss, acc = train_engine.train(
model=model,
batch_size=config['data.batch_size'],
epochs=config['train.epochs'],
max_patience=config['train.patience'],
train_gen=train_gen,
train_len=train_len,
val_gen=val_gen,
val_len=val_len,
train_loss=train_loss,
train_accuracy=train_accuracy,
val_loss=val_loss,
val_accuracy=val_accuracy,
train_step=train_step,
test_step=test_step,
checkpoint_path=checkpoint_path,
train_summary_writer=train_summary_writer,
val_summary_writer=val_summary_writer,
csv_output_file=csv_output_path,
)
time_end = time.time()
summary = "{}, {}, {}, {}, {}, {}\n".format(now_as_str,
config['data.dataset'],
config['model.name'],
config_path, loss, acc)
print(summary)
file = open(summary_path, 'a+')
file.write(summary)
file.close()
model_path = tf.train.latest_checkpoint(checkpoint_dir,
latest_filename=checkpoint_path)
if not model_path:
print("Skipping evaluation. No checkpoint found in: {}".format(
checkpoint_dir))
else:
model_from_saved = tf.keras.models.load_model(model_path)
model_from_saved.summary()
# Runs test data through the reloaded model to make sure the results are same.
predictions_from_saved = model_from_saved.predict(val_gen)
elapsed = time_end - time_start
h, min = elapsed // 3600, elapsed % 3600 // 60
sec = elapsed - min * 60
print(f"Training took: {h:.2f}h {min:.2f}m {sec:.2f}s!")
def train(dataset_name,
loss_name,
block_size,
partition_rule,
selection_rule,
update_rule,
n_iters,
L1,
L2,
optimal=None,
datasets_path=""):
np.random.seed(1)
# load dataset
dataset = datasets.load(dataset_name, path=datasets_path)
A, b, args = dataset["A"], dataset["b"], dataset["args"]
args.update({
"L2": L2,
"L1": L1,
"block_size": block_size,
"update_rule": update_rule
})
# loss function
lossObject = losses.create_lossObject(loss_name, A, b, args)
# Get partitions
partition = partition_rules.get_partition(A,
b,
lossObject,
block_size,
p_rule=partition_rule)
# Initialize x
x = np.zeros(lossObject.n_params)
score_list = []
pbar = tqdm(desc="starting", total=n_iters, leave=True)
###### TRAINING STARTS HERE ############
block = np.array([])
for i in range(n_iters + 1):
# Compute loss
loss = lossObject.f_func(x, A, b)
dis2opt = loss - \
exp_configs.OPTIMAL_LOSS[dataset_name + "_" + loss_name]
score_list += [{"loss": loss, "iteration": i, "selected": block}]
stdout = ("%d - %s_%s_%s - dis2opt:%.16f - nz: %d/%d" %
(i, partition_rule, selection_rule, update_rule, dis2opt,
(x != 0).sum(), x.size))
print(stdout)
# Check convergence
if (i > 5 and (np.array_equal(work, np.where(x > 1e-16)[0]))):
score_list[-1]["converged"] = dis2opt
if (i > 5 and (dis2opt == 0 or dis2opt < 1e-8)):
break
# Check increase
if (i > 0) and (loss > score_list[-1]["loss"] + 1e-6):
raise ValueError("loss value has increased...")
# Select block
if partition is None:
block, args = VB_selection_rules.select(selection_rule,
x,
A,
b,
lossObject,
args,
iteration=i)
else:
block, args = FB_selection_rules.select(selection_rule,
x,
A,
b,
lossObject,
args,
partition,
iteration=i)
# Update block
x, args = update_rules.update(update_rule,
x,
A,
b,
lossObject,
args=args,
block=block,
iteration=i)
pbar.close()
for score_dict in score_list:
score_dict["loss"] -= exp_configs.OPTIMAL_LOSS[dataset_name + "_" +
loss_name]
return score_list