def build_opt(opt_D, opt_G, lr_D, lr_G, lr_rec=None, opt_rec=None):
_opt_D = data_utils.get_optimizer(opt_D, lr_D)
_opt_G = data_utils.get_optimizer(opt_G, lr_G)
_opt_C = data_utils.get_optimizer('Adam', lr_D)
_opt_Z = data_utils.get_optimizer('Adam', lr_G)
if opt_rec is None:
return _opt_D, _opt_G, _opt_C, _opt_Z
else:
_opt_rec = data_utils.get_optimizer(opt_rec, lr_rec)
return _opt_D, _opt_G, _opt_C, _opt_Z, _opt_rec
def train_toy(**kwargs):
"""
Train model
args: **kwargs (dict) keyword arguments that specify the model hyperparameters
"""
# Roll out the parameters
batch_size = kwargs["batch_size"]
n_batch_per_epoch = kwargs["n_batch_per_epoch"]
nb_epoch = kwargs["nb_epoch"]
noise_dim = kwargs["noise_dim"]
noise_scale = kwargs["noise_scale"]
lr_D = kwargs["lr_D"]
lr_G = kwargs["lr_G"]
opt_D = kwargs["opt_D"]
opt_G = kwargs["opt_G"]
clamp_lower = kwargs["clamp_lower"]
clamp_upper = kwargs["clamp_upper"]
epoch_size = n_batch_per_epoch * batch_size
print("\nExperiment parameters:")
for key in kwargs.keys():
print key, kwargs[key]
print("\n")
# Setup environment (logging directory etc)
general_utils.setup_logging("toy_MLP")
# Load and rescale data
X_real_train = data_utils.load_toy()
# Create optimizers
opt_G = data_utils.get_optimizer(opt_G, lr_G)
opt_D = data_utils.get_optimizer(opt_D, lr_D)
#######################
# Load models
#######################
noise_dim = (noise_dim,)
generator_model = models.generator_toy(noise_dim)
discriminator_model = models.discriminator_toy()
GAN_model = models.GAN_toy(generator_model, discriminator_model, noise_dim)
############################
# Compile models
############################
generator_model.compile(loss='mse', optimizer=opt_G)
discriminator_model.trainable = False
GAN_model.compile(loss=models.wasserstein, optimizer=opt_G)
discriminator_model.trainable = True
discriminator_model.compile(loss=models.wasserstein, optimizer=opt_D)
# Global iteration counter for generator updates
gen_iterations = 0
#################
# Start training
#################
for e in range(nb_epoch):
# Initialize progbar and batch counter
progbar = generic_utils.Progbar(epoch_size)
batch_counter = 1
start = time.time()
while batch_counter < n_batch_per_epoch:
disc_iterations = kwargs["disc_iterations"]
###################################
# 1) Train the critic / discriminator
###################################
list_disc_loss_real = []
list_disc_loss_gen = []
for disc_it in range(disc_iterations):
# Clip discriminator weights
for l in discriminator_model.layers:
weights = l.get_weights()
weights = [np.clip(w, clamp_lower, clamp_upper) for w in weights]
l.set_weights(weights)
X_real_batch = next(data_utils.gen_batch(X_real_train, batch_size))
# Create a batch to feed the discriminator model
X_disc_real, X_disc_gen = data_utils.get_disc_batch(X_real_batch,
generator_model,
batch_counter,
batch_size,
noise_dim,
noise_scale=noise_scale)
# Update the discriminator
disc_loss_real = discriminator_model.train_on_batch(X_disc_real, -np.ones(X_disc_real.shape[0]))
disc_loss_gen = discriminator_model.train_on_batch(X_disc_gen, np.ones(X_disc_gen.shape[0]))
list_disc_loss_real.append(disc_loss_real)
list_disc_loss_gen.append(disc_loss_gen)
#######################
# 2) Train the generator
#######################
X_gen = data_utils.sample_noise(noise_scale, batch_size, noise_dim)
# Freeze the discriminator
discriminator_model.trainable = False
gen_loss = GAN_model.train_on_batch(X_gen, -np.ones(X_gen.shape[0]))
# Unfreeze the discriminator
discriminator_model.trainable = True
batch_counter += 1
progbar.add(batch_size, values=[("Loss_D", -np.mean(list_disc_loss_real) - np.mean(list_disc_loss_gen)),
("Loss_D_real", -np.mean(list_disc_loss_real)),
("Loss_D_gen", np.mean(list_disc_loss_gen)),
("Loss_G", -gen_loss)])
# # Save images for visualization
if gen_iterations % 50 == 0:
data_utils.plot_generated_toy_batch(X_real_train, generator_model,
discriminator_model, noise_dim, gen_iterations)
gen_iterations += 1
print('\nEpoch %s/%s, Time: %s' % (e + 1, nb_epoch, time.time() - start))
def train(**kwargs):
"""
Train standard DCGAN model
args: **kwargs (dict) keyword arguments that specify the model hyperparameters
"""
# Roll out the parameters
generator = kwargs["generator"]
dset = kwargs["dset"]
img_dim = kwargs["img_dim"]
nb_epoch = kwargs["nb_epoch"]
batch_size = kwargs["batch_size"]
n_batch_per_epoch = kwargs["n_batch_per_epoch"]
bn_mode = kwargs["bn_mode"]
noise_dim = kwargs["noise_dim"]
noise_scale = kwargs["noise_scale"]
lr_D = kwargs["lr_D"]
lr_G = kwargs["lr_G"]
opt_D = kwargs["opt_D"]
opt_G = kwargs["opt_G"]
clamp_lower = kwargs["clamp_lower"]
clamp_upper = kwargs["clamp_upper"]
image_dim_ordering = kwargs["image_dim_ordering"]
epoch_size = n_batch_per_epoch * batch_size
print("\nExperiment parameters:")
for key in kwargs.keys():
print key, kwargs[key]
print("\n")
# Setup environment (logging directory etc)
general_utils.setup_logging("DCGAN")
# Load and normalize data
X_real_train = data_utils.load_image_dataset(dset, img_dim, image_dim_ordering)
# Get the full real image dimension
img_dim = X_real_train.shape[-3:]
# Create optimizers
opt_G = data_utils.get_optimizer(opt_G, lr_G)
opt_D = data_utils.get_optimizer(opt_D, lr_D)
#######################
# Load models
#######################
noise_dim = (noise_dim,)
if generator == "upsampling":
generator_model = models.generator_upsampling(noise_dim, img_dim, bn_mode, dset=dset)
else:
generator_model = models.generator_deconv(noise_dim, img_dim, bn_mode, batch_size, dset=dset)
discriminator_model = models.discriminator(img_dim, bn_mode)
DCGAN_model = models.DCGAN(generator_model, discriminator_model, noise_dim, img_dim)
############################
# Compile models
############################
generator_model.compile(loss='mse', optimizer=opt_G)
discriminator_model.trainable = False
DCGAN_model.compile(loss=models.wasserstein, optimizer=opt_G)
discriminator_model.trainable = True
discriminator_model.compile(loss=models.wasserstein, optimizer=opt_D)
# Global iteration counter for generator updates
gen_iterations = 0
#################
# Start training
################
for e in range(nb_epoch):
# Initialize progbar and batch counter
progbar = generic_utils.Progbar(epoch_size)
batch_counter = 1
start = time.time()
while batch_counter < n_batch_per_epoch:
if gen_iterations < 25 or gen_iterations % 500 == 0:
disc_iterations = 100
else:
disc_iterations = kwargs["disc_iterations"]
###################################
# 1) Train the critic / discriminator
###################################
list_disc_loss_real = []
list_disc_loss_gen = []
for disc_it in range(disc_iterations):
# Clip discriminator weights
for l in discriminator_model.layers:
weights = l.get_weights()
weights = [np.clip(w, clamp_lower, clamp_upper) for w in weights]
l.set_weights(weights)
X_real_batch = next(data_utils.gen_batch(X_real_train, batch_size))
# Create a batch to feed the discriminator model
X_disc_real, X_disc_gen = data_utils.get_disc_batch(X_real_batch,
generator_model,
batch_counter,
batch_size,
noise_dim,
noise_scale=noise_scale)
# Update the discriminator
disc_loss_real = discriminator_model.train_on_batch(X_disc_real, -np.ones(X_disc_real.shape[0]))
disc_loss_gen = discriminator_model.train_on_batch(X_disc_gen, np.ones(X_disc_gen.shape[0]))
list_disc_loss_real.append(disc_loss_real)
list_disc_loss_gen.append(disc_loss_gen)
#######################
# 2) Train the generator
#######################
X_gen = data_utils.sample_noise(noise_scale, batch_size, noise_dim)
# Freeze the discriminator
discriminator_model.trainable = False
gen_loss = DCGAN_model.train_on_batch(X_gen, -np.ones(X_gen.shape[0]))
# Unfreeze the discriminator
discriminator_model.trainable = True
gen_iterations += 1
batch_counter += 1
progbar.add(batch_size, values=[("Loss_D", -np.mean(list_disc_loss_real) - np.mean(list_disc_loss_gen)),
("Loss_D_real", -np.mean(list_disc_loss_real)),
("Loss_D_gen", np.mean(list_disc_loss_gen)),
("Loss_G", -gen_loss)])
# Save images for visualization ~2 times per epoch
if batch_counter % (n_batch_per_epoch / 2) == 0:
data_utils.plot_generated_batch(X_real_batch, generator_model,
batch_size, noise_dim, image_dim_ordering)
print('\nEpoch %s/%s, Time: %s' % (e + 1, nb_epoch, time.time() - start))
# Save model weights (by default, every 5 epochs)
data_utils.save_model_weights(generator_model, discriminator_model, DCGAN_model, e)
def train(**kwargs):
"""
Train standard DCGAN model
args: **kwargs (dict) keyword arguments that specify the model hyperparameters
"""
# Roll out the parameters
generator = kwargs["generator"]
discriminator = kwargs["discriminator"]
dset = kwargs["dset"]
img_dim = kwargs["img_dim"]
nb_epoch = kwargs["nb_epoch"]
batch_size = kwargs["batch_size"]
n_batch_per_epoch = kwargs["n_batch_per_epoch"]
bn_mode = kwargs["bn_mode"]
noise_dim = kwargs["noise_dim"]
noise_scale = kwargs["noise_scale"]
lr_D = kwargs["lr_D"]
lr_G = kwargs["lr_G"]
opt_D = kwargs["opt_D"]
opt_G = kwargs["opt_G"]
use_mbd = kwargs["use_mbd"]
image_dim_ordering = kwargs["image_dim_ordering"]
epoch_size = n_batch_per_epoch * batch_size
deterministic = kwargs["deterministic"]
inject_noise = kwargs["inject_noise"]
model = kwargs["model"]
no_supertrain = kwargs["no_supertrain"]
pureGAN = kwargs["pureGAN"]
lsmooth = kwargs["lsmooth"]
disc_type = kwargs["disc_type"]
resume = kwargs["resume"]
name = kwargs["name"]
wd = kwargs["wd"]
history_size = kwargs["history_size"]
monsterClass = kwargs["monsterClass"]
print("\nExperiment parameters:")
for key in kwargs.keys():
print key, kwargs[key]
print("\n")
# Setup environment (logging directory etc)
general_utils.setup_logging("DCGAN")
# Load and normalize data
if dset == "mnistM":
X_source_train, Y_source_train, X_source_test, Y_source_test, n_classes1 = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='mnist')
# X_source_train=np.concatenate([X_source_train,X_source_train,X_source_train], axis=1)
# X_source_test=np.concatenate([X_source_test,X_source_test,X_source_test], axis=1)
X_dest_train, Y_dest_train, X_dest_test, Y_dest_test, n_classes2 = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='mnistM')
elif dset == "OfficeDslrToAmazon":
X_source_train, Y_source_train, X_source_test, Y_source_test, n_classes1 = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='OfficeDslr')
X_dest_train, Y_dest_train, X_dest_test, Y_dest_test, n_classes2 = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='OfficeAmazon')
else:
print "dataset not supported"
if n_classes1 != n_classes2: #sanity check
print "number of classes mismatch between source and dest domains"
n_classes = n_classes1 #
img_source_dim = X_source_train.shape[-3:] # is it backend agnostic?
img_dest_dim = X_dest_train.shape[-3:]
# Create optimizers
opt_D = data_utils.get_optimizer(opt_D, lr_D)
opt_G = data_utils.get_optimizer(opt_G, lr_G)
opt_GC = data_utils.get_optimizer('Adam', lr_G / 10.0)
opt_C = data_utils.get_optimizer('Adam', lr_D)
opt_Z = data_utils.get_optimizer('Adam', lr_G)
#######################
# Load models
#######################
noise_dim = (noise_dim, )
generator_model = models.generator_google_mnistM(noise_dim, img_source_dim,
img_dest_dim,
deterministic, pureGAN,
wd)
# discriminator_model = models.discriminator_google_mnistM(img_dest_dim, wd)
discriminator_model = models.discriminator_dcgan(img_dest_dim, wd,
n_classes, disc_type)
classificator_model = models.classificator_google_mnistM(
img_dest_dim, n_classes, wd)
DCGAN_model = models.DCGAN_naive(generator_model, discriminator_model,
noise_dim, img_source_dim)
zclass_model = z_coerence(generator_model,
img_source_dim,
bn_mode,
wd,
inject_noise,
n_classes,
noise_dim,
model_name="zClass")
# GenToClassifier_model = models.GenToClassifierModel(generator_model, classificator_model, noise_dim, img_source_dim)
#disc_penalty_model = models.disc_penalty(discriminator_model,noise_dim,img_source_dim,opt_D,model_name="disc_penalty_model")
zclass_model = z_coerence(generator_model,
img_source_dim,
bn_mode,
wd,
inject_noise,
n_classes,
noise_dim,
model_name="zClass")
############################
# Compile models
############################
generator_model.compile(loss='mse', optimizer=opt_G)
models.make_trainable(discriminator_model, False)
models.make_trainable(classificator_model, False)
# models.make_trainable(disc_penalty_model, False)
if model == 'wgan':
DCGAN_model.compile(loss=models.wasserstein, optimizer=opt_G)
models.make_trainable(discriminator_model, True)
# models.make_trainable(disc_penalty_model, True)
discriminator_model.compile(loss=models.wasserstein, optimizer=opt_D)
if model == 'lsgan':
if disc_type == "simple_disc":
DCGAN_model.compile(loss=['mse'], optimizer=opt_G)
models.make_trainable(discriminator_model, True)
discriminator_model.compile(loss=['mse'], optimizer=opt_D)
elif disc_type == "nclass_disc":
DCGAN_model.compile(loss=['mse', 'categorical_crossentropy'],
loss_weights=[1.0, 0.1],
optimizer=opt_G)
models.make_trainable(discriminator_model, True)
discriminator_model.compile(
loss=['mse', 'categorical_crossentropy'],
loss_weights=[1.0, 0.1],
optimizer=opt_D)
# GenToClassifier_model.compile(loss='categorical_crossentropy', optimizer=opt_GC)
models.make_trainable(classificator_model, True)
classificator_model.compile(loss='categorical_crossentropy',
metrics=['accuracy'],
optimizer=opt_C)
zclass_model.compile(loss=['mse'], optimizer=opt_Z)
visualize = True
########
#MAKING TRAIN+TEST numpy array for global testing:
########
Xtarget_dataset = np.concatenate([X_dest_train, X_dest_test], axis=0)
Ytarget_dataset = np.concatenate([Y_dest_train, Y_dest_test], axis=0)
if resume: ########loading previous saved model weights and checking actual performance
data_utils.load_model_weights(generator_model, discriminator_model,
DCGAN_model, name, classificator_model,
zclass_model)
# data_utils.load_model_weights(generator_model, discriminator_model, DCGAN_model, name,classificator_model)
# loss4, acc4 = classificator_model.evaluate(Xtarget_dataset, Ytarget_dataset,batch_size=1024, verbose=0)
# print('\n Classifier Accuracy on full target domain: %.2f%%' % (100 * acc4))
else:
X_gen = data_utils.sample_noise(noise_scale, X_source_train.shape[0],
noise_dim)
zclass_loss = zclass_model.fit([X_gen, X_source_train], [X_gen],
batch_size=256,
epochs=10)
####train zclass regression model only if not resuming:
gen_iterations = 0
max_history_size = int(history_size * batch_size)
img_buffer = ImageHistoryBuffer((0, ) + img_source_dim, max_history_size,
batch_size, n_classes)
#################
# Start training
################
for e in range(nb_epoch):
# Initialize progbar and batch counter
progbar = generic_utils.Progbar(epoch_size)
batch_counter = 1
start = time.time()
while batch_counter < n_batch_per_epoch:
if no_supertrain is None:
if (gen_iterations < 25) and (not resume):
disc_iterations = 100
if gen_iterations % 500 == 0:
disc_iterations = 100
else:
disc_iterations = kwargs["disc_iterations"]
else:
if (gen_iterations < 25) and (not resume):
disc_iterations = 100
else:
disc_iterations = kwargs["disc_iterations"]
###################################
# 1) Train the critic / discriminator
###################################
list_disc_loss_real = deque(10 * [0], 10)
list_disc_loss_gen = deque(10 * [0], 10)
list_gen_loss = deque(10 * [0], 10)
list_zclass_loss = deque(10 * [0], 10)
list_classifier_loss = deque(10 * [0], 10)
list_gp_loss = deque(10 * [0], 10)
for disc_it in range(disc_iterations):
X_dest_batch, Y_dest_batch, idx_dest_batch = next(
data_utils.gen_batch(X_dest_train, Y_dest_train,
batch_size))
X_source_batch, Y_source_batch, idx_source_batch = next(
data_utils.gen_batch(X_source_train, Y_source_train,
batch_size))
##########
# Create a batch to feed the discriminator model
#########
X_disc_real, X_disc_gen = data_utils.get_disc_batch(
X_dest_batch,
generator_model,
batch_counter,
batch_size,
noise_dim,
X_source_batch,
noise_scale=noise_scale)
# Update the discriminator
if model == 'wgan':
current_labels_real = -np.ones(X_disc_real.shape[0])
current_labels_gen = np.ones(X_disc_gen.shape[0])
elif model == 'lsgan':
if disc_type == "simple_disc":
current_labels_real = np.ones(X_disc_real.shape[0])
current_labels_gen = np.zeros(X_disc_gen.shape[0])
elif disc_type == "nclass_disc":
virtual_real_labels = np.zeros(
[X_disc_gen.shape[0], n_classes])
current_labels_real = [
np.ones(X_disc_real.shape[0]), virtual_real_labels
]
current_labels_gen = [
np.zeros(X_disc_gen.shape[0]), Y_source_batch
]
##############
#Train the disc on gen-buffered samples and on current real samples
##############
disc_loss_real = discriminator_model.train_on_batch(
X_disc_real, current_labels_real)
img_buffer.add_to_buffer(X_disc_gen, current_labels_gen,
batch_size)
bufferImages, bufferLabels = img_buffer.get_from_buffer(
batch_size)
disc_loss_gen = discriminator_model.train_on_batch(
bufferImages, bufferLabels)
#if not isinstance(disc_loss_real, collections.Iterable): disc_loss_real = [disc_loss_real]
#if not isinstance(disc_loss_real, collections.Iterable): disc_loss_gen = [disc_loss_gen]
if disc_type == "simple_disc":
list_disc_loss_real.appendleft(disc_loss_real)
list_disc_loss_gen.appendleft(disc_loss_gen)
elif disc_type == "nclass_disc":
list_disc_loss_real.appendleft(disc_loss_real[0])
list_disc_loss_gen.appendleft(disc_loss_gen[0])
#############
####Train the discriminator w.r.t gradient penalty
#############
#gp_loss = disc_penalty_model.train_on_batch([X_disc_real,X_disc_gen],current_labels_real) #dummy labels,not used in the loss function
#list_gp_loss.appendleft(gp_loss)
################
###CLASSIFIER TRAINING OUTSIDE DISC LOOP(wanna train in just 1 time even if disc_iter > 1)
#################
class_loss_gen = classificator_model.train_on_batch(
X_disc_gen, Y_source_batch * 0.7) #LABEL SMOOTHING!!!!
list_classifier_loss.appendleft(class_loss_gen[1])
#######################
# 2) Train the generator
#######################
X_gen = data_utils.sample_noise(noise_scale, batch_size, noise_dim)
X_source_batch2, Y_source_batch2, idx_source_batch2 = next(
data_utils.gen_batch(X_source_train, Y_source_train,
batch_size))
if model == 'wgan':
gen_loss = DCGAN_model.train_on_batch([X_gen, X_source_batch2],
-np.ones(X_gen.shape[0]))
if model == 'lsgan':
if disc_type == "simple_disc":
gen_loss = DCGAN_model.train_on_batch(
[X_gen, X_source_batch2],
np.ones(X_gen.shape[0])) #TRYING SAME BATCH OF DISC
elif disc_type == "nclass_disc":
gen_loss = DCGAN_model.train_on_batch(
[X_gen, X_source_batch2],
[np.ones(X_gen.shape[0]), Y_source_batch2])
gen_loss = gen_loss[0]
list_gen_loss.appendleft(gen_loss)
zclass_loss = zclass_model.train_on_batch([X_gen, X_source_batch2],
[X_gen])
list_zclass_loss.appendleft(zclass_loss)
##############
#Train the generator w.r.t the aux classifier:
#############
# GenToClassifier_model.train_on_batch([X_gen,X_source_batch2],Y_source_batch2)
# I SHOULD TRY TO CLASSIFY EVEN ON DISCRIMINATOR, PUTTING ONE CLASS FOR REAL SAMPLES AND N CLASS FOR FAKE
gen_iterations += 1
batch_counter += 1
progbar.add(batch_size,
values=[("Loss_D_real", np.mean(list_disc_loss_real)),
("Loss_D_gen", np.mean(list_disc_loss_gen)),
("Loss_G", np.mean(list_gen_loss)),
("Loss_Z", np.mean(list_zclass_loss)),
("Loss_Classifier",
np.mean(list_classifier_loss))])
# plot images 1 times per epoch
if batch_counter % (n_batch_per_epoch) == 0:
X_source_batch_plot, Y_source_batch_plot, idx_source_plot = next(
data_utils.gen_batch(X_source_test,
Y_source_test,
batch_size=32))
data_utils.plot_generated_batch(X_dest_test,
X_source_test,
generator_model,
noise_dim,
image_dim_ordering,
idx_source_plot,
batch_size=32)
if gen_iterations % (n_batch_per_epoch * 5) == 0:
if visualize:
BIG_ASS_VISUALIZATION_slerp(X_source_train[1],
generator_model, noise_dim)
# if (e % 20) == 0:
# lr_decay([discriminator_model,DCGAN_model,classificator_model],decay_value=0.95)
print("Dest labels:")
print(Y_dest_test[idx_source_plot].argmax(1))
print("Source labels:")
print(Y_source_batch_plot.argmax(1))
print('\nEpoch %s/%s, Time: %s' %
(e + 1, nb_epoch, time.time() - start))
# Save model weights (by default, every 5 epochs)
data_utils.save_model_weights(generator_model, discriminator_model,
DCGAN_model, e, name,
classificator_model, zclass_model)
#testing accuracy of trained classifier
loss4, acc4 = classificator_model.evaluate(Xtarget_dataset,
Ytarget_dataset,
batch_size=1024,
verbose=0)
print(
'\n Classifier Accuracy and loss on full target domain: %.2f%% / %.5f%%'
% ((100 * acc4), loss4))
def train_toy(**kwargs):
"""
Train model
args: **kwargs (dict) keyword arguments that specify the model hyperparameters
"""
# Roll out the parameters
batch_size = kwargs["batch_size"]
n_batch_per_epoch = kwargs["n_batch_per_epoch"]
nb_epoch = kwargs["nb_epoch"]
noise_dim = kwargs["noise_dim"]
noise_scale = kwargs["noise_scale"]
lr_D = kwargs["lr_D"]
lr_G = kwargs["lr_G"]
opt_D = kwargs["opt_D"]
opt_G = kwargs["opt_G"]
clamp_lower = kwargs["clamp_lower"]
clamp_upper = kwargs["clamp_upper"]
epoch_size = n_batch_per_epoch * batch_size
print("\nExperiment parameters:")
for key in kwargs.keys():
print key, kwargs[key]
print("\n")
# Setup environment (logging directory etc)
general_utils.setup_logging("toy_MLP")
# Load and rescale data
X_real_train = data_utils.load_toy()
# Create optimizers
opt_G = data_utils.get_optimizer(opt_G, lr_G)
opt_D = data_utils.get_optimizer(opt_D, lr_D)
#######################
# Load models
#######################
noise_dim = (noise_dim, )
generator_model = models.generator_toy(noise_dim)
discriminator_model = models.discriminator_toy()
GAN_model = models.GAN_toy(generator_model, discriminator_model, noise_dim)
############################
# Compile models
############################
generator_model.compile(loss='mse', optimizer=opt_G)
discriminator_model.trainable = False
GAN_model.compile(loss=models.wasserstein, optimizer=opt_G)
discriminator_model.trainable = True
discriminator_model.compile(loss=models.wasserstein, optimizer=opt_D)
# Global iteration counter for generator updates
gen_iterations = 0
#################
# Start training
#################
for e in range(nb_epoch):
# Initialize progbar and batch counter
progbar = generic_utils.Progbar(epoch_size)
batch_counter = 1
start = time.time()
while batch_counter < n_batch_per_epoch:
disc_iterations = kwargs["disc_iterations"]
###################################
# 1) Train the critic / discriminator
###################################
list_disc_loss_real = []
list_disc_loss_gen = []
for disc_it in range(disc_iterations):
# Clip discriminator weights
for l in discriminator_model.layers:
weights = l.get_weights()
weights = [
np.clip(w, clamp_lower, clamp_upper) for w in weights
]
l.set_weights(weights)
X_real_batch = next(
data_utils.gen_batch(X_real_train, batch_size))
# Create a batch to feed the discriminator model
X_disc_real, X_disc_gen = data_utils.get_disc_batch(
X_real_batch,
generator_model,
batch_counter,
batch_size,
noise_dim,
noise_scale=noise_scale)
# Update the discriminator
disc_loss_real = discriminator_model.train_on_batch(
X_disc_real, -np.ones(X_disc_real.shape[0]))
disc_loss_gen = discriminator_model.train_on_batch(
X_disc_gen, np.ones(X_disc_gen.shape[0]))
list_disc_loss_real.append(disc_loss_real)
list_disc_loss_gen.append(disc_loss_gen)
#######################
# 2) Train the generator
#######################
X_gen = data_utils.sample_noise(noise_scale, batch_size, noise_dim)
# Freeze the discriminator
discriminator_model.trainable = False
gen_loss = GAN_model.train_on_batch(X_gen,
-np.ones(X_gen.shape[0]))
# Unfreeze the discriminator
discriminator_model.trainable = True
batch_counter += 1
progbar.add(batch_size,
values=[("Loss_D", -np.mean(list_disc_loss_real) -
np.mean(list_disc_loss_gen)),
("Loss_D_real", -np.mean(list_disc_loss_real)),
("Loss_D_gen", np.mean(list_disc_loss_gen)),
("Loss_G", -gen_loss)])
# # Save images for visualization
if gen_iterations % 50 == 0:
data_utils.plot_generated_toy_batch(X_real_train,
generator_model,
discriminator_model,
noise_dim, gen_iterations)
gen_iterations += 1
print('\nEpoch %s/%s, Time: %s' %
(e + 1, nb_epoch, time.time() - start))
def train(**kwargs):
"""
Train standard DCGAN model
args: **kwargs (dict) keyword arguments that specify the model hyperparameters
"""
# Roll out the parameters
generator = kwargs["generator"]
dset = kwargs["dset"]
img_dim = kwargs["img_dim"]
nb_epoch = kwargs["nb_epoch"]
batch_size = kwargs["batch_size"]
n_batch_per_epoch = kwargs["n_batch_per_epoch"]
bn_mode = kwargs["bn_mode"]
noise_dim = kwargs["noise_dim"]
noise_scale = kwargs["noise_scale"]
lr_D = kwargs["lr_D"]
lr_G = kwargs["lr_G"]
opt_D = kwargs["opt_D"]
opt_G = kwargs["opt_G"]
clamp_lower = kwargs["clamp_lower"]
clamp_upper = kwargs["clamp_upper"]
image_dim_ordering = kwargs["image_dim_ordering"]
epoch_size = n_batch_per_epoch * batch_size
print("\nExperiment parameters:")
for key in kwargs.keys():
print key, kwargs[key]
print("\n")
# Setup environment (logging directory etc)
general_utils.setup_logging("DCGAN")
# Load and normalize data
X_real_train = data_utils.load_image_dataset(dset, img_dim,
image_dim_ordering)
# Get the full real image dimension
img_dim = X_real_train.shape[-3:]
# Create optimizers
opt_G = data_utils.get_optimizer(opt_G, lr_G)
opt_D = data_utils.get_optimizer(opt_D, lr_D)
#######################
# Load models
#######################
noise_dim = (noise_dim, )
if generator == "upsampling":
generator_model = models.generator_upsampling(noise_dim,
img_dim,
bn_mode,
dset=dset)
else:
generator_model = models.generator_deconv(noise_dim,
img_dim,
bn_mode,
batch_size,
dset=dset)
discriminator_model = models.discriminator(img_dim, bn_mode, dset=dset)
DCGAN_model = models.DCGAN(generator_model, discriminator_model, noise_dim,
img_dim)
############################
# Compile models
############################
generator_model.compile(loss='mse', optimizer=opt_G)
discriminator_model.trainable = False
DCGAN_model.compile(loss=models.wasserstein, optimizer=opt_G)
discriminator_model.trainable = True
discriminator_model.compile(loss=models.wasserstein, optimizer=opt_D)
# Global iteration counter for generator updates
gen_iterations = 0
#################
# Start training
################
for e in range(nb_epoch):
# Initialize progbar and batch counter
progbar = generic_utils.Progbar(epoch_size)
batch_counter = 1
start = time.time()
while batch_counter < n_batch_per_epoch:
if gen_iterations < 25 or gen_iterations % 500 == 0:
disc_iterations = 100
else:
disc_iterations = kwargs["disc_iterations"]
###################################
# 1) Train the critic / discriminator
###################################
list_disc_loss_real = []
list_disc_loss_gen = []
for disc_it in range(disc_iterations):
# Clip discriminator weights
for l in discriminator_model.layers:
weights = l.get_weights()
weights = [
np.clip(w, clamp_lower, clamp_upper) for w in weights
]
l.set_weights(weights)
X_real_batch = next(
data_utils.gen_batch(X_real_train, batch_size))
# Create a batch to feed the discriminator model
X_disc_real, X_disc_gen = data_utils.get_disc_batch(
X_real_batch,
generator_model,
batch_counter,
batch_size,
noise_dim,
noise_scale=noise_scale)
# Update the discriminator
disc_loss_real = discriminator_model.train_on_batch(
X_disc_real, -np.ones(X_disc_real.shape[0]))
disc_loss_gen = discriminator_model.train_on_batch(
X_disc_gen, np.ones(X_disc_gen.shape[0]))
list_disc_loss_real.append(disc_loss_real)
list_disc_loss_gen.append(disc_loss_gen)
#######################
# 2) Train the generator
#######################
X_gen = X_gen = data_utils.sample_noise(noise_scale, batch_size,
noise_dim)
# Freeze the discriminator
discriminator_model.trainable = False
gen_loss = DCGAN_model.train_on_batch(X_gen,
-np.ones(X_gen.shape[0]))
# Unfreeze the discriminator
discriminator_model.trainable = True
gen_iterations += 1
batch_counter += 1
progbar.add(batch_size,
values=[("Loss_D", -np.mean(list_disc_loss_real) -
np.mean(list_disc_loss_gen)),
("Loss_D_real", -np.mean(list_disc_loss_real)),
("Loss_D_gen", np.mean(list_disc_loss_gen)),
("Loss_G", -gen_loss)])
# Save images for visualization ~2 times per epoch
if batch_counter % (n_batch_per_epoch / 2) == 0:
data_utils.plot_generated_batch(X_real_batch, generator_model,
batch_size, noise_dim,
image_dim_ordering)
print('\nEpoch %s/%s, Time: %s' %
(e + 1, nb_epoch, time.time() - start))
# Save model weights (by default, every 5 epochs)
data_utils.save_model_weights(generator_model, discriminator_model,
DCGAN_model, e)
def train(**kwargs):
"""
Train standard DCGAN model
args: **kwargs (dict) keyword arguments that specify the model hyperparameters
"""
# Roll out the parameters
generator = kwargs["generator"]
discriminator = kwargs["discriminator"]
dset = kwargs["dset"]
img_dim = kwargs["img_dim"]
nb_epoch = kwargs["nb_epoch"]
batch_size = kwargs["batch_size"]
n_batch_per_epoch = kwargs["n_batch_per_epoch"]
bn_mode = kwargs["bn_mode"]
noise_dim = kwargs["noise_dim"]
noise_scale = kwargs["noise_scale"]
lr_D = kwargs["lr_D"]
lr_G = kwargs["lr_G"]
opt_D = kwargs["opt_D"]
opt_G = kwargs["opt_G"]
use_mbd = kwargs["use_mbd"]
clamp_lower = kwargs["clamp_lower"]
clamp_upper = kwargs["clamp_upper"]
image_dim_ordering = kwargs["image_dim_ordering"]
epoch_size = n_batch_per_epoch * batch_size
deterministic = kwargs["deterministic"]
inject_noise = kwargs["inject_noise"]
model = kwargs["model"]
no_supertrain = kwargs["no_supertrain"]
pureGAN = kwargs["pureGAN"]
lsmooth = kwargs["lsmooth"]
simple_disc = kwargs["simple_disc"]
resume = kwargs["resume"]
name = kwargs["name"]
wd = kwargs["wd"]
history_size = kwargs["history_size"]
monsterClass = kwargs["monsterClass"]
print("\nExperiment parameters:")
for key in kwargs.keys():
print key, kwargs[key]
print("\n")
# Setup environment (logging directory etc)
general_utils.setup_logging("DCGAN")
# Load and normalize data
if dset == "mnistM":
X_source_train, Y_source_train, X_source_test, Y_source_test, n_classes1 = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='mnist')
X_dest_train, Y_dest_train, X_dest_test, Y_dest_test, n_classes2 = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='mnistM')
#code.interact(local=locals())
elif dset == "washington_vandal50k":
X_source_train = data_utils.load_image_dataset(img_dim,
image_dim_ordering,
dset='washington')
X_dest_train = data_utils.load_image_dataset(img_dim,
image_dim_ordering,
dset='vandal50k')
elif dset == "washington_vandal12classes":
X_source_train = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='washington12classes')
X_dest_train = data_utils.load_image_dataset(img_dim,
image_dim_ordering,
dset='vandal12classes')
elif dset == "washington_vandal12classesNoBackground":
X_source_train, Y_source_train, n_classes1 = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='washington12classes')
X_dest_train, Y_dest_train, n_classes2 = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='vandal12classesNoBackground')
elif dset == "Wash_Vand_12class_LMDB":
X_source_train, Y_source_train, n_classes1 = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='Wash_12class_LMDB')
elif dset == "OfficeDslrToAmazon":
X_source_train, Y_source_train, X_source_test, Y_source_test, n_classes1 = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='OfficeDslr')
X_dest_train, Y_dest_train, X_dest_test, Y_dest_test, n_classes2 = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='OfficeAmazon')
elif dset == "bedrooms":
X_source_train, Y_source_train, X_source_test, Y_source_test, n_classes1 = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='bedrooms_small')
X_dest_train, Y_dest_train, X_dest_test, Y_dest_test, n_classes2 = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='bedrooms')
elif dset == "Vand_Vand_12class_LMDB":
X_source_train, Y_source_train, X_source_test, Y_source_test, n_classes1 = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='Vand_12class_LMDB_Background')
X_dest_train, Y_dest_train, X_dest_test, Y_dest_test, n_classes2 = data_utils.load_image_dataset(
img_dim, image_dim_ordering, dset='Vand_12class_LMDB')
else:
print "dataset not supported"
if n_classes1 != n_classes2: #sanity check
print "number of classes mismatch between source and dest domains"
n_classes = n_classes1 #
img_source_dim = X_source_train.shape[-3:] # is it backend agnostic?
img_dest_dim = X_dest_train.shape[-3:]
# Create optimizers
opt_D = data_utils.get_optimizer(opt_D, lr_D)
opt_G = data_utils.get_optimizer(opt_G, lr_G)
opt_C = data_utils.get_optimizer('SGD', 0.01)
#######################
# Load models
#######################
noise_dim = (noise_dim, )
if generator == "upsampling":
generator_model = models.generator_upsampling_mnistM(noise_dim,
img_source_dim,
img_dest_dim,
bn_mode,
deterministic,
pureGAN,
inject_noise,
wd,
dset=dset)
else:
generator_model = models.generator_deconv(noise_dim,
img_dest_dim,
bn_mode,
batch_size,
dset=dset)
if simple_disc:
discriminator_model = models.discriminator_naive(
img_dest_dim, bn_mode, model, wd, inject_noise, n_classes, use_mbd)
DCGAN_model = models.DCGAN_naive(generator_model, discriminator_model,
noise_dim, img_source_dim)
elif discriminator == "disc_resnet":
discriminator_model = models.discriminatorResNet(
img_dest_dim, bn_mode, model, wd, monsterClass, inject_noise,
n_classes, use_mbd)
DCGAN_model = models.DCGAN(generator_model, discriminator_model,
noise_dim, img_source_dim, img_dest_dim,
monsterClass)
else:
discriminator_model = models.disc1(img_dest_dim, bn_mode, model, wd,
monsterClass, inject_noise,
n_classes, use_mbd)
DCGAN_model = models.DCGAN(generator_model, discriminator_model,
noise_dim, img_source_dim, img_dest_dim,
monsterClass)
####special options for bedrooms dataset:
if dset == "bedrooms":
generator_model = models.generator_dcgan(noise_dim, img_source_dim,
img_dest_dim, bn_mode,
deterministic, pureGAN,
inject_noise, wd)
discriminator_model = models.discriminator_naive(
img_dest_dim,
bn_mode,
model,
wd,
inject_noise,
n_classes,
use_mbd,
model_name="discriminator_naive")
DCGAN_model = models.DCGAN_naive(generator_model, discriminator_model,
noise_dim, img_source_dim)
############################
# Compile models
############################
generator_model.compile(loss='mse', optimizer=opt_G)
models.make_trainable(discriminator_model, False)
#discriminator_model.trainable = False
if model == 'wgan':
DCGAN_model.compile(loss=models.wasserstein, optimizer=opt_G)
models.make_trainable(discriminator_model, True)
discriminator_model.compile(loss=models.wasserstein, optimizer=opt_D)
if model == 'lsgan':
if simple_disc:
DCGAN_model.compile(loss=['mse'], optimizer=opt_G)
models.make_trainable(discriminator_model, True)
discriminator_model.compile(loss=['mse'], optimizer=opt_D)
elif monsterClass:
DCGAN_model.compile(loss=['categorical_crossentropy'],
optimizer=opt_G)
models.make_trainable(discriminator_model, True)
discriminator_model.compile(loss=['categorical_crossentropy'],
optimizer=opt_D)
else:
DCGAN_model.compile(loss=['mse', 'categorical_crossentropy'],
loss_weights=[1.0, 1.0],
optimizer=opt_G)
models.make_trainable(discriminator_model, True)
discriminator_model.compile(
loss=['mse', 'categorical_crossentropy'],
loss_weights=[1.0, 1.0],
optimizer=opt_D)
visualize = True
if resume: ########loading previous saved model weights
data_utils.load_model_weights(generator_model, discriminator_model,
DCGAN_model, name)
#####################
###classifier
#####################
if not ((dset == 'mnistM') or (dset == 'bedrooms')):
classifier, GenToClassifierModel = classifier_build_test(
img_dest_dim,
n_classes,
generator_model,
noise_dim,
noise_scale,
img_source_dim,
opt_C,
X_source_test,
Y_source_test,
X_dest_test,
Y_dest_test,
wd=0.0001)
gen_iterations = 0
max_history_size = int(history_size * batch_size)
img_buffer = ImageHistoryBuffer((0, ) + img_source_dim, max_history_size,
batch_size, n_classes)
#################
# Start training
################
for e in range(nb_epoch):
# Initialize progbar and batch counter
progbar = generic_utils.Progbar(epoch_size)
batch_counter = 1
start = time.time()
while batch_counter < n_batch_per_epoch:
if no_supertrain is None:
if (gen_iterations < 25) and (not resume):
disc_iterations = 100
if gen_iterations % 500 == 0:
disc_iterations = 10
else:
disc_iterations = kwargs["disc_iterations"]
else:
if (gen_iterations < 25) and (not resume):
disc_iterations = 100
else:
disc_iterations = kwargs["disc_iterations"]
###################################
# 1) Train the critic / discriminator
###################################
list_disc_loss_real = []
list_disc_loss_gen = []
list_gen_loss = []
for disc_it in range(disc_iterations):
# Clip discriminator weights
#for l in discriminator_model.layers:
# weights = l.get_weights()
# weights = [np.clip(w, clamp_lower, clamp_upper) for w in weights]
# l.set_weights(weights)
X_dest_batch, Y_dest_batch, idx_dest_batch = next(
data_utils.gen_batch(X_dest_train, Y_dest_train,
batch_size))
X_source_batch, Y_source_batch, idx_source_batch = next(
data_utils.gen_batch(X_source_train, Y_source_train,
batch_size))
# Create a batch to feed the discriminator model
X_disc_real, X_disc_gen = data_utils.get_disc_batch(
X_dest_batch,
generator_model,
batch_counter,
batch_size,
noise_dim,
X_source_batch,
noise_scale=noise_scale)
if model == 'wgan':
# Update the discriminator
current_labels_real = -np.ones(X_disc_real.shape[0])
current_labels_gen = np.ones(X_disc_gen.shape[0])
if model == 'lsgan':
if simple_disc: #for real domain I put [labels 0 0 0...0], for fake domain I put [0 0...0 labels]
current_labels_real = np.ones(X_disc_real.shape[0])
#current_labels_gen = -np.ones(X_disc_gen.shape[0])
current_labels_gen = np.zeros(X_disc_gen.shape[0])
elif monsterClass: #for real domain I put [labels 0 0 0...0], for fake domain I put [0 0...0 labels]
current_labels_real = np.concatenate(
(Y_dest_batch,
np.zeros((X_disc_real.shape[0], n_classes))),
axis=1)
current_labels_gen = np.concatenate((np.zeros(
(X_disc_real.shape[0], n_classes)),
Y_source_batch),
axis=1)
else:
current_labels_real = [
np.ones(X_disc_real.shape[0]), Y_dest_batch
]
Y_fake_batch = (1.0 / n_classes) * np.ones(
[X_disc_gen.shape[0], n_classes])
current_labels_gen = [
np.zeros(X_disc_gen.shape[0]), Y_fake_batch
]
#label smoothing
#current_labels_real = np.multiply(current_labels_real, lsmooth) #usually lsmooth = 0.7
disc_loss_real = discriminator_model.train_on_batch(
X_disc_real, current_labels_real)
img_buffer.add_to_buffer(X_disc_gen, current_labels_gen,
batch_size)
bufferImages, bufferLabels = img_buffer.get_from_buffer(
batch_size)
disc_loss_gen = discriminator_model.train_on_batch(
bufferImages, bufferLabels)
list_disc_loss_real.append(disc_loss_real)
list_disc_loss_gen.append(disc_loss_gen)
#######################
# 2) Train the generator
#######################
X_gen = data_utils.sample_noise(noise_scale, batch_size, noise_dim)
X_source_batch2, Y_source_batch2, idx_source_batch2 = next(
data_utils.gen_batch(X_source_train, Y_source_train,
batch_size))
# w1 = classifier.get_weights() #FOR DEBUG
if model == 'wgan':
gen_loss = DCGAN_model.train_on_batch([X_gen, X_source_batch2],
-np.ones(X_gen.shape[0]))
if model == 'lsgan':
if simple_disc:
gen_loss = DCGAN_model.train_on_batch(
[X_gen, X_source_batch2],
np.ones(X_gen.shape[0])) #TRYING SAME BATCH OF DISC?
elif monsterClass:
labels_gen = np.concatenate(
(Y_source_batch2,
np.zeros((X_disc_real.shape[0], n_classes))),
axis=1)
gen_loss = DCGAN_model.train_on_batch(
[X_gen, X_source_batch2], labels_gen)
else:
gen_loss = DCGAN_model.train_on_batch(
[X_gen, X_source_batch2],
[np.ones(X_gen.shape[0]), Y_source_batch2])
# gen_loss2 = GenToClassifierModel.train_on_batch([X_gen,X_source_batch2], Y_source_batch2)
# w2 = classifier.get_weights() #FOR DEBUG
# for a,b in zip(w1, w2):
# if np.all(a == b):
# print "no bug in GEN model update"
# else:
# print "BUG IN GEN MODEL UPDATE"
list_gen_loss.append(gen_loss)
gen_iterations += 1
batch_counter += 1
progbar.add(batch_size,
values=[("Loss_D", 0.5 * np.mean(list_disc_loss_real) +
0.5 * np.mean(list_disc_loss_gen)),
("Loss_D_real", np.mean(list_disc_loss_real)),
("Loss_D_gen", np.mean(list_disc_loss_gen)),
("Loss_G", np.mean(list_gen_loss))])
# plot images 1 times per epoch
if batch_counter % (n_batch_per_epoch) == 0:
X_source_batch_plot, Y_source_batch_plot, idx_source_plot = next(
data_utils.gen_batch(X_source_test,
Y_source_test,
batch_size=32))
data_utils.plot_generated_batch(X_dest_test,
X_source_test,
generator_model,
noise_dim,
image_dim_ordering,
idx_source_plot,
batch_size=32)
if gen_iterations % (n_batch_per_epoch * 5) == 0:
if visualize:
BIG_ASS_VISUALIZATION_slerp(X_source_train[1],
generator_model, noise_dim)
print("Dest labels:")
print(Y_dest_test[idx_source_plot].argmax(1))
print("Source labels:")
print(Y_source_batch_plot.argmax(1))
print('\nEpoch %s/%s, Time: %s' %
(e + 1, nb_epoch, time.time() - start))
# Save model weights (by default, every 5 epochs)
data_utils.save_model_weights(generator_model, discriminator_model,
DCGAN_model, e, name)
def build_opt(opt_D, opt_G, lr_D, lr_G):
_opt_D = data_utils.get_optimizer(opt_D, lr_D)
_opt_G = data_utils.get_optimizer(opt_G, lr_G)
_opt_C = data_utils.get_optimizer('Adam', lr_D)
_opt_Z = data_utils.get_optimizer('Adam', lr_G)
return _opt_D, _opt_G, _opt_C, _opt_Z
def trainDECO(**kwargs):
"""
Train standard DCGAN model
args: **kwargs (dict) keyword arguments that specify the model hyperparameters
"""
# Roll out the parameters
generator = kwargs["generator"]
discriminator = kwargs["discriminator"]
dset = kwargs["dset"]
img_dim = kwargs["img_dim"]
nb_epoch = kwargs["nb_epoch"]
batch_size = kwargs["batch_size"]
n_batch_per_epoch = kwargs["n_batch_per_epoch"]
bn_mode = kwargs["bn_mode"]
noise_dim = kwargs["noise_dim"]
noise_scale = kwargs["noise_scale"]
lr_D = kwargs["lr_D"]
lr_G = kwargs["lr_G"]
opt_D = kwargs["opt_D"]
opt_G = kwargs["opt_G"]
clamp_lower = kwargs["clamp_lower"]
clamp_upper = kwargs["clamp_upper"]
image_dim_ordering = kwargs["image_dim_ordering"]
epoch_size = n_batch_per_epoch * batch_size
deterministic = kwargs["deterministic"]
inject_noise = kwargs["inject_noise"]
model = kwargs["model"]
no_supertrain = kwargs["no_supertrain"]
noClass = kwargs["noClass"]
resume = kwargs["resume"]
name = kwargs["name"]
wd = kwargs["wd"]
monsterClass = kwargs["monsterClass"]
pretrained = kwargs["pretrained"]
print("\nExperiment parameters:")
for key in kwargs.keys():
print key, kwargs[key]
print("\n")
# Setup environment (logging directory etc)
general_utils.setup_logging("DCGAN")
# Load and normalize data
if dset == "mnistM":
X_source_train,Y_source_train, _, _, n_classes1 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='mnist')
X_dest_train,Y_dest_train, _, _,n_classes2 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='mnistM')
elif dset == "washington_vandal50k":
X_source_train = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='washington')
X_dest_train = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='vandal50k')
elif dset == "washington_vandal12classes":
X_source_train = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='washington12classes')
X_dest_train = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='vandal12classes')
elif dset == "washington_vandal12classesNoBackground":
X_source_train,Y_source_train,n_classes1 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='washington12classes')
X_dest_train,Y_dest_train,n_classes2 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='vandal12classesNoBackground')
elif dset == "Wash_Vand_12class_LMDB":
X_source_train,Y_source_train,n_classes1 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='Wash_12class_LMDB')
X_dest_train,Y_dest_train,n_classes2 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='Vand_12class_LMDB')
elif dset == "Vand_Vand_12class_LMDB":
X_source_train,Y_source_train,X_source_test, Y_source_test,n_classes1 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='Vand_12class_LMDB_Background')
X_dest_train,Y_dest_train, X_dest_test, Y_dest_test, n_classes2 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='Vand_12class_LMDB')
elif dset == "Wash_Color_LMDB":
X_source_train,Y_source_train,X_source_test, Y_source_test,n_classes1 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='Wash_Color_LMDB')
X_dest_train,Y_dest_train, X_dest_test, Y_dest_test, n_classes2 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='Wash_Color_LMDB')
else:
print "dataset not supported"
if n_classes1 != n_classes2: #sanity check
print "number of classes mismatch between source and dest domains"
n_classes = n_classes1
# Get the full real image dimension
img_source_dim = X_source_train.shape[-3:] # is it backend agnostic?
img_dest_dim = X_dest_train.shape[-3:]
# Create optimizers
opt_G = data_utils.get_optimizer(opt_G, lr_G)
opt_D = data_utils.get_optimizer(opt_D, lr_D)
opt_C = data_utils.get_optimizer('SGD', 0.01)
#######################
# Load models
#######################
noise_dim = (noise_dim,)
generator_model = models.generator_upsampling_mnistM(noise_dim, img_source_dim,img_dest_dim, bn_mode,deterministic,inject_noise,wd, dset=dset)
classifier = models.resnet(img_dest_dim,n_classes,wd=0.0001) #it is img_dest_dim because it is actually the generated image dim,that is equal to dest_dim
GenToClassifierModel = models.GenToClassifierModel(generator_model, classifier, noise_dim, img_source_dim)
#################
# Load weight
################
if pretrained:
model_path = "../../models/DCGAN"
class_weights_path = os.path.join(model_path, 'NoBackground_100epochs.h5')
classifier.load_weights(class_weights_path)
# if resume: ########loading previous saved model weights
# data_utils.load_model_weights(generator_model, discriminator_model, DCGAN_model, name)
#######################
# Compile models
#######################
generator_model.compile(loss='mse', optimizer=opt_G)
# classifier.trainable = True # I wanna freeze the classifier without any training updates
classifier.compile(loss='categorical_crossentropy', optimizer=opt_C,metrics=['accuracy']) # it is actually never using optimizer
models.make_trainable(classifier, False)
GenToClassifierModel.compile(loss='categorical_crossentropy', optimizer=opt_G,metrics=['accuracy'])
#######################
# Train classifier
#######################
if not pretrained:
loss1,acc1 =classifier.evaluate(X_dest_test, Y_dest_test,batch_size=256, verbose=0)
print('\n Classifier Accuracy on target domain test set before training: %.00f%%' % (100.0 * acc1))
classifier.fit(X_dest_train, Y_dest_train, validation_split=0.1, batch_size=512, nb_epoch=20, verbose=1)
else:
print ("Loaded pretrained classifier, computing accuracy on target domain test set:")
loss2,acc2 = classifier.evaluate(X_dest_test, Y_dest_test,batch_size=512, verbose=0)
print('\n Classifier Accuracy on target domain test set after training: %.00f%%' % (100.0 * acc2))
loss3, acc3 = classifier.evaluate(X_source_test, Y_source_test,batch_size=512, verbose=0)
print('\n Classifier Accuracy on source domain test set: %.00f%%' % (100.0 * acc3))
evaluating_GENned(noise_scale,noise_dim,X_source_test,Y_source_test,classifier,generator_model)
# model_path = "../../models/DCGAN"
# class_weights_path = os.path.join(model_path, 'NoBackground_100epochs.h5')
# classifier.save_weights(class_weights_path, overwrite=True)
# models.make_trainable(classifier, False)
#classifier.trainable = False # I wanna freeze the classifier without any more training updates
# classifier.compile(loss='categorical_crossentropy', optimizer=opt_C,metrics=['accuracy'])
#################
# DECO training
################
gen_iterations = 0
for e in range(nb_epoch):
# Initialize progbar and batch counter
progbar = generic_utils.Progbar(epoch_size)
batch_counter = 1
start = time.time()
###################################
# 1) Train the critic / discriminator
###################################
list_class_loss_real = []
X_dest_batch, Y_dest_batch,idx_dest_batch = next(data_utils.gen_batch(X_dest_train, Y_dest_train, batch_size))
X_source_batch, Y_source_batch,idx_source_batch = next(data_utils.gen_batch(X_source_train, Y_source_train, batch_size))
#######################
# 2) Train the generator
#######################
X_gen = data_utils.sample_noise(noise_scale, batch_size*n_batch_per_epoch, noise_dim)
X_source_batch2, Y_source_batch2,idx_source_batch2 = next(data_utils.gen_batch(X_source_train, Y_source_train, batch_size*n_batch_per_epoch))
GenToClassifierModel.fit([X_gen, X_source_batch2], Y_source_batch2, batch_size=256, nb_epoch=1, verbose=1)
gen_iterations += 1
batch_counter += 1
# plot images 1 times per epoch
X_dest_batch_plot,Y_dest_batch_plot,idx_dest_plot = next(data_utils.gen_batch(X_dest_train,Y_dest_train, batch_size=32))
X_source_batch_plot,Y_source_batch_plot,idx_source_plot = next(data_utils.gen_batch(X_source_train,Y_source_train, batch_size=32))
data_utils.plot_generated_batch(X_dest_train,X_source_train, generator_model,
noise_dim, image_dim_ordering,idx_source_plot,batch_size=32)
print ("Dest labels:")
print (Y_dest_train[idx_source_plot].argmax(1))
print ("Source labels:")
print (Y_source_batch_plot.argmax(1))
print('\nEpoch %s/%s, Time: %s' % (e + 1, nb_epoch, time.time() - start))
# Save model weights (by default, every 5 epochs)
#data_utils.save_model_weights(generator_model, discriminator_model, DCGAN_model, e, name)
evaluating_GENned(noise_scale,noise_dim,X_source_test,Y_source_test,classifier,generator_model)
loss3, acc3 = classifier.evaluate(X_source_test, Y_source_test,batch_size=512, verbose=0)
print('\n Classifier Accuracy on source domain test set: %.00f%%' % (100.0 * acc3))
def trainClassAux(**kwargs):
"""
Train standard DCGAN model
args: **kwargs (dict) keyword arguments that specify the model hyperparameters
"""
# Roll out the parameters
generator = kwargs["generator"]
discriminator = kwargs["discriminator"]
dset = kwargs["dset"]
img_dim = kwargs["img_dim"]
nb_epoch = kwargs["nb_epoch"]
batch_size = kwargs["batch_size"]
n_batch_per_epoch = kwargs["n_batch_per_epoch"]
bn_mode = kwargs["bn_mode"]
noise_dim = kwargs["noise_dim"]
noise_scale = kwargs["noise_scale"]
lr_D = kwargs["lr_D"]
lr_G = kwargs["lr_G"]
opt_D = kwargs["opt_D"]
opt_G = kwargs["opt_G"]
clamp_lower = kwargs["clamp_lower"]
clamp_upper = kwargs["clamp_upper"]
image_dim_ordering = kwargs["image_dim_ordering"]
epoch_size = n_batch_per_epoch * batch_size
deterministic = kwargs["deterministic"]
inject_noise = kwargs["inject_noise"]
model = kwargs["model"]
no_supertrain = kwargs["no_supertrain"]
noClass = kwargs["noClass"]
resume = kwargs["resume"]
name = kwargs["name"]
wd = kwargs["wd"]
C_weight = kwargs["C_weight"]
monsterClass = kwargs["monsterClass"]
pretrained = kwargs["pretrained"]
print("\nExperiment parameters:")
for key in kwargs.keys():
print key, kwargs[key]
print("\n")
# Setup environment (logging directory etc)
general_utils.setup_logging("DCGAN")
# Load and normalize data
if dset == "mnistM":
X_source_train,Y_source_train, X_source_test, Y_source_test, n_classes1 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='mnist')
X_dest_train,Y_dest_train, X_dest_test, Y_dest_test,n_classes2 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='mnistM')
elif dset == "washington_vandal50k":
X_source_train = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='washington')
X_dest_train = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='vandal50k')
elif dset == "washington_vandal12classes":
X_source_train = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='washington12classes')
X_dest_train = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='vandal12classes')
elif dset == "washington_vandal12classesNoBackground":
X_source_train,Y_source_train,n_classes1 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='washington12classes')
X_dest_train,Y_dest_train,n_classes2 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='vandal12classesNoBackground')
elif dset == "Wash_Vand_12class_LMDB":
X_source_train,Y_source_train,n_classes1 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='Wash_12class_LMDB')
X_dest_train,Y_dest_train,n_classes2 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='Vand_12class_LMDB')
elif dset == "Vand_Vand_12class_LMDB":
X_source_train,Y_source_train,X_source_test, Y_source_test,n_classes1 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='Vand_12class_LMDB_Background')
X_dest_train,Y_dest_train, X_dest_test, Y_dest_test, n_classes2 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='Vand_12class_LMDB')
elif dset == "Wash_Color_LMDB":
X_source_train,Y_source_train,X_source_test, Y_source_test,n_classes1 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='Wash_Color_LMDB')
X_dest_train,Y_dest_train, X_dest_test, Y_dest_test, n_classes2 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='Wash_Color_LMDB')
else:
print "dataset not supported"
if n_classes1 != n_classes2: #sanity check
print "number of classes mismatch between source and dest domains"
n_classes = n_classes1 #
img_source_dim = X_source_train.shape[-3:] # is it backend agnostic?
img_dest_dim = X_dest_train.shape[-3:]
X_source_train.flags.writeable = False
X_source_test.flags.writeable = False
X_dest_train.flags.writeable = False
X_dest_test.flags.writeable = False
# Create optimizers
opt_G = data_utils.get_optimizer(opt_G, lr_G)
opt_G_C = data_utils.get_optimizer(opt_G, lr_G*C_weight)
opt_D = data_utils.get_optimizer(opt_D, lr_D)
opt_C = data_utils.get_optimizer('SGD', 0.01)
#######################
# Load models
#######################
noise_dim = (noise_dim,)
if generator == "upsampling":
generator_model = models.generator_upsampling_mnistM(noise_dim, img_source_dim,img_dest_dim, bn_mode,deterministic,inject_noise,wd, dset=dset)
else:
generator_model = models.generator_deconv(noise_dim, img_dest_dim, bn_mode, batch_size, dset=dset)
discriminator_model = models.discriminator(img_dest_dim, bn_mode,model,wd,monsterClass,inject_noise,n_classes)
DCGAN_model = models.DCGAN_naive(generator_model, discriminator_model, noise_dim, img_source_dim)
classifier = models.resnet(img_dest_dim,n_classes,pretrained,wd=0.0001) #it is img_dest_dim because it is actually the generated image dim,that is equal to dest_dim
GenToClassifierModel = models.GenToClassifierModel(generator_model, classifier, noise_dim, img_source_dim)
############################
# Load weights
############################
if resume:
data_utils.load_model_weights(generator_model, discriminator_model, DCGAN_model, name)
#if pretrained:
# model_path = "../../models/DCGAN"
# class_weights_path = os.path.join(model_path, 'NoBackground_100epochs.h5')
# classifier.load_weights(class_weights_path)
############################
# Compile models
############################
generator_model.compile(loss='mse', optimizer=opt_G)
if model == 'wgan':
discriminator_model.compile(loss=models.wasserstein, optimizer=opt_D)
models.make_trainable(discriminator_model, False)
DCGAN_model.compile(loss=models.wasserstein, optimizer=opt_G)
if model == 'lsgan':
discriminator_model.compile(loss='mse', optimizer=opt_D)
models.make_trainable(discriminator_model, False)
DCGAN_model.compile(loss='mse', optimizer=opt_G)
classifier.compile(loss='categorical_crossentropy', optimizer=opt_C,metrics=['accuracy']) # it is actually never using optimizer
models.make_trainable(classifier, False)
GenToClassifierModel.compile(loss='categorical_crossentropy', optimizer=opt_G,metrics=['accuracy'])
#######################
# Train classifier
#######################
# if not pretrained:
# #print ("Testing accuracy on target domain test set before training:")
# loss1,acc1 =classifier.evaluate(X_dest_test, Y_dest_test,batch_size=256, verbose=0)
# print('\n Classifier Accuracy on target domain test set before training: %.2f%%' % (100 * acc1))
# classifier.fit(X_dest_train, Y_dest_train, validation_split=0.1, batch_size=512, nb_epoch=10, verbose=1)
# print ("\n Testing accuracy on target domain test set AFTER training:")
# else:
# print ("Loaded pretrained classifier, computing accuracy on target domain test set:")
# loss2,acc2 = classifier.evaluate(X_dest_test, Y_dest_test,batch_size=512, verbose=0)
# print('\n Classifier Accuracy on target domain test set after training: %.2f%%' % (100 * acc2))
#print ("Testing accuracy on source domain test set:")
# loss3, acc3 = classifier.evaluate(X_source_test, Y_source_test,batch_size=512, verbose=0)
# print('\n Classifier Accuracy on source domain test set: %.2f%%' % (100 * acc3))
# evaluating_GENned(noise_scale, noise_dim, X_source_test, Y_source_test, classifier, generator_model)
# model_path = "../../models/DCGAN"
# class_weights_path = os.path.join(model_path, 'VandToVand_5epochs.h5')
# classifier.save_weights(class_weights_path, overwrite=True)
#################
# GAN training
################
gen_iterations = 0
for e in range(nb_epoch):
# Initialize progbar and batch counter
progbar = generic_utils.Progbar(epoch_size)
batch_counter = 1
start = time.time()
while batch_counter < n_batch_per_epoch:
if no_supertrain is None:
if (gen_iterations < 25) and (not resume):
disc_iterations = 100
if gen_iterations % 500 == 0:
disc_iterations = 100
else:
disc_iterations = kwargs["disc_iterations"]
else:
if (gen_iterations <25) and (not resume):
disc_iterations = 100
else:
disc_iterations = kwargs["disc_iterations"]
###################################
# 1) Train the critic / discriminator
###################################
list_disc_loss_real = []
list_disc_loss_gen = []
list_gen_loss = []
list_class_loss_real = []
for disc_it in range(disc_iterations):
# Clip discriminator weights
# for l in discriminator_model.layers:
# weights = l.get_weights()
# weights = [np.clip(w, clamp_lower, clamp_upper) for w in weights]
# l.set_weights(weights)
X_dest_batch, Y_dest_batch,idx_dest_batch = next(data_utils.gen_batch(X_dest_train, Y_dest_train, batch_size))
X_source_batch, Y_source_batch,idx_source_batch = next(data_utils.gen_batch(X_source_train, Y_source_train, batch_size))
# Create a batch to feed the discriminator model
X_disc_real, X_disc_gen = data_utils.get_disc_batch(X_dest_batch,
generator_model,
batch_counter,
batch_size,
noise_dim,
X_source_batch,
noise_scale=noise_scale)
if model == 'wgan':
# Update the discriminator
disc_loss_real = discriminator_model.train_on_batch(X_disc_real, -np.ones(X_disc_real.shape[0]))
disc_loss_gen = discriminator_model.train_on_batch(X_disc_gen, np.ones(X_disc_gen.shape[0]))
if model == 'lsgan':
disc_loss_real = discriminator_model.train_on_batch(X_disc_real, np.ones(X_disc_real.shape[0]))
disc_loss_gen = discriminator_model.train_on_batch(X_disc_gen, np.zeros(X_disc_gen.shape[0]))
list_disc_loss_real.append(disc_loss_real)
list_disc_loss_gen.append(disc_loss_gen)
#######################
# 2) Train the generator with GAN loss
#######################
X_gen = data_utils.sample_noise(noise_scale, batch_size, noise_dim)
source_images = X_source_train[np.random.randint(0,X_source_train.shape[0],size=batch_size),:,:,:]
X_source_batch2, Y_source_batch2,idx_source_batch2 = next(data_utils.gen_batch(X_source_train, Y_source_train, batch_size))
# Freeze the discriminator
# discriminator_model.trainable = False
if model == 'wgan':
gen_loss = DCGAN_model.train_on_batch([X_gen,X_source_batch2], -np.ones(X_gen.shape[0]))
if model == 'lsgan':
gen_loss = DCGAN_model.train_on_batch([X_gen,X_source_batch2], np.ones(X_gen.shape[0]))
list_gen_loss.append(gen_loss)
#######################
# 3) Train the generator with Classifier loss
#######################
w1 = classifier.get_weights() #FOR DEBUG
if not noClass:
new_gen_loss = GenToClassifierModel.train_on_batch([X_gen,X_source_batch2], Y_source_batch2)
list_class_loss_real.append(new_gen_loss)
else:
list_class_loss_real.append(0.0)
w2 = classifier.get_weights() #FOR DEBUG
for a,b in zip(w1, w2):
if np.all(a == b):
print "no bug in GEN model update"
else:
print "BUG IN GEN MODEL UPDATE"
gen_iterations += 1
batch_counter += 1
progbar.add(batch_size, values=[("Loss_D", 0.5*np.mean(list_disc_loss_real) + 0.5*np.mean(list_disc_loss_gen)),
("Loss_D_real", np.mean(list_disc_loss_real)),
("Loss_D_gen", np.mean(list_disc_loss_gen)),
("Loss_G", np.mean(list_gen_loss)),
("Loss_classifier", np.mean(list_class_loss_real))])
# plot images 1 times per epoch
if batch_counter % (n_batch_per_epoch) == 0:
# train_WGAN.plot_images(X_dest_batch)
X_dest_batch_plot,Y_dest_batch_plot,idx_dest_plot = next(data_utils.gen_batch(X_dest_train,Y_dest_train, batch_size=32))
X_source_batch_plot,Y_source_batch_plot,idx_source_plot = next(data_utils.gen_batch(X_source_train,Y_source_train, batch_size=32))
data_utils.plot_generated_batch(X_dest_train,X_source_train, generator_model,
noise_dim, image_dim_ordering,idx_source_plot,batch_size=32)
print ("Dest labels:")
print (Y_dest_train[idx_source_plot].argmax(1))
print ("Source labels:")
print (Y_source_batch_plot.argmax(1))
print('\nEpoch %s/%s, Time: %s' % (e + 1, nb_epoch, time.time() - start))
# Save model weights (by default, every 5 epochs)
data_utils.save_model_weights(generator_model, discriminator_model, DCGAN_model, e, name)
evaluating_GENned(noise_scale,noise_dim,X_source_test,Y_source_test,classifier,generator_model)
loss3, acc3 = classifier.evaluate(X_source_test, Y_source_test,batch_size=512, verbose=0)
print('\n Classifier Accuracy on source domain test set: %.2f%%' % (100 * acc3))
#vgg16_model.load_weights(path)
return vgg16_model
img_dim=64
image_dim_ordering='th'
X_source_train,Y_source_train,X_source_test, Y_source_test,n_classes1 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='OfficeDslr')
X_dest_train,Y_dest_train,X_dest_test, Y_dest_test, n_classes2 = data_utils.load_image_dataset(img_dim, image_dim_ordering,dset='OfficeAmazon')
n_classes = n_classes1 #
img_source_dim = X_source_train.shape[-3:] # is it backend agnostic?
img_dest_dim = X_dest_train.shape[-3:]
opt_C = data_utils.get_optimizer('SGD', 0.01)
classifier = vgg16(img_dest_dim,n_classes,pretrained=False,wd=0.0001)
classifier.summary()
model_path = "../../models/DCGAN"
class_weights_path = os.path.join(model_path, 'vgg16r_OfficeDslrToAmazon.h5')
trained=False
if trained:
classifier.load_weights(class_weights_path)
classifier.compile(loss='categorical_crossentropy', optimizer=opt_C,metrics=['accuracy'])
loss1,acc1 =classifier.evaluate(X_dest_test, Y_dest_test,batch_size=512, verbose=0)
print('\n Classifier Accuracy on target domain test set before training: %.2f%%' % (100 * acc1))
sgd = keras.optimizers.SGD(lr=0.01, decay=0, momentum=0.9, nesterov=True)
K.set_value(sgd.lr, K.get_value(sgd.lr))
def train(**kwargs):
"""
Train standard DCGAN model
args: **kwargs (dict) keyword arguments that specify the model hyperparameters
"""
# Roll out the parameters
generator = kwargs["generator"]
dset = kwargs["dset"]
img_dim = kwargs["img_dim"]
nb_epoch = kwargs["nb_epoch"]
batch_size = kwargs["batch_size"]
n_batch_per_epoch = kwargs["n_batch_per_epoch"]
noise_dim = kwargs["noise_dim"]
noise_scale = kwargs["noise_scale"]
lr_D = kwargs["lr_D"]
lr_G = kwargs["lr_G"]
opt_D = kwargs["opt_D"]
opt_G = kwargs["opt_G"]
clamp_lower = kwargs["clamp_lower"]
clamp_upper = kwargs["clamp_upper"]
image_data_format = kwargs["image_data_format"]
save_weights_every_n_epochs = kwargs["save_weights_every_n_epochs"]
save_only_last_n_weights = kwargs["save_only_last_n_weights"]
visualize_images_every_n_epochs = kwargs["visualize_images_every_n_epochs"]
model_name = kwargs["model_name"]
epoch_size = n_batch_per_epoch * batch_size
print("\nExperiment parameters:")
for key in kwargs.keys():
print(key, kwargs[key])
print("\n")
# Setup environment (logging directory etc)
general_utils.setup_logging(**kwargs)
# Load and normalize data
X_real_train, X_batch_gen = data_utils.load_image_dataset(
dset, img_dim, image_data_format, batch_size)
# Get the full real image dimension
img_dim = X_real_train.shape[-3:]
# Create optimizers
opt_G = data_utils.get_optimizer(opt_G, lr_G)
opt_D = data_utils.get_optimizer(opt_D, lr_D)
#######################
# Load models
#######################
noise_dim = (noise_dim, )
if generator == "upsampling":
generator_model = models.generator_upsampling(noise_dim,
img_dim,
dset=dset)
else:
generator_model = models.generator_deconv(noise_dim,
img_dim,
batch_size,
dset=dset)
discriminator_model = models.discriminator(img_dim)
DCGAN_model = models.DCGAN(generator_model, discriminator_model, noise_dim,
img_dim)
############################
# Compile models
############################
generator_model.compile(loss='mse', optimizer=opt_G)
discriminator_model.trainable = False
DCGAN_model.compile(loss=models.wasserstein, optimizer=opt_G)
discriminator_model.trainable = True
discriminator_model.compile(loss=models.wasserstein, optimizer=opt_D)
# Global iteration counter for generator updates
gen_iterations = 0
disc_losses = []
disc_losses_real = []
disc_losses_gen = []
gen_losses = []
#################
# Start training
################
try:
for e in range(nb_epoch):
print('--------------------------------------------')
print('[{0:%Y/%m/%d %H:%M:%S}] Epoch {1:d}/{2:d}\n'.format(
datetime.datetime.now(), e + 1, nb_epoch))
# Initialize progbar and batch counter
progbar = generic_utils.Progbar(epoch_size)
batch_counter = 0
start = time.time()
disc_loss_batch = 0
disc_loss_real_batch = 0
disc_loss_gen_batch = 0
gen_loss_batch = 0
for batch_counter in range(n_batch_per_epoch):
if gen_iterations < 25 or gen_iterations % 500 == 0:
disc_iterations = 100
else:
disc_iterations = kwargs["disc_iterations"]
###################################
# 1) Train the critic / discriminator
###################################
list_disc_loss_real = []
list_disc_loss_gen = []
for disc_it in range(disc_iterations):
# Clip discriminator weights
for l in discriminator_model.layers:
weights = l.get_weights()
weights = [
np.clip(w, clamp_lower, clamp_upper)
for w in weights
]
l.set_weights(weights)
X_real_batch = next(
data_utils.gen_batch(X_real_train, X_batch_gen,
batch_size))
# Create a batch to feed the discriminator model
X_disc_real, X_disc_gen = data_utils.get_disc_batch(
X_real_batch,
generator_model,
batch_counter,
batch_size,
noise_dim,
noise_scale=noise_scale)
# Update the discriminator
disc_loss_real = discriminator_model.train_on_batch(
X_disc_real, -np.ones(X_disc_real.shape[0]))
disc_loss_gen = discriminator_model.train_on_batch(
X_disc_gen, np.ones(X_disc_gen.shape[0]))
list_disc_loss_real.append(disc_loss_real)
list_disc_loss_gen.append(disc_loss_gen)
#######################
# 2) Train the generator
#######################
X_gen = data_utils.sample_noise(noise_scale, batch_size,
noise_dim)
# Freeze the discriminator
discriminator_model.trainable = False
gen_loss = DCGAN_model.train_on_batch(X_gen,
-np.ones(X_gen.shape[0]))
# Unfreeze the discriminator
discriminator_model.trainable = True
gen_iterations += 1
disc_loss_batch += -np.mean(list_disc_loss_real) - np.mean(
list_disc_loss_gen)
disc_loss_real_batch += -np.mean(list_disc_loss_real)
disc_loss_gen_batch += np.mean(list_disc_loss_gen)
gen_loss_batch += -gen_loss
progbar.add(batch_size,
values=[
("Loss_D", -np.mean(list_disc_loss_real) -
np.mean(list_disc_loss_gen)),
("Loss_D_real", -np.mean(list_disc_loss_real)),
("Loss_D_gen", np.mean(list_disc_loss_gen)),
("Loss_G", -gen_loss)
])
# # Save images for visualization ~2 times per epoch
# if batch_counter % (n_batch_per_epoch / 2) == 0:
# data_utils.plot_generated_batch(X_real_batch, generator_model,
# batch_size, noise_dim, image_data_format)
disc_losses.append(disc_loss_batch / n_batch_per_epoch)
disc_losses_real.append(disc_loss_real_batch / n_batch_per_epoch)
disc_losses_gen.append(disc_loss_gen_batch / n_batch_per_epoch)
gen_losses.append(gen_loss_batch / n_batch_per_epoch)
# Save images for visualization
if (e + 1) % visualize_images_every_n_epochs == 0:
data_utils.plot_generated_batch(X_real_batch, generator_model,
e, batch_size, noise_dim,
image_data_format, model_name)
data_utils.plot_losses(disc_losses, disc_losses_real,
disc_losses_gen, gen_losses, model_name)
# Save model weights (by default, every 5 epochs)
data_utils.save_model_weights(generator_model, discriminator_model,
DCGAN_model, e,
save_weights_every_n_epochs,
save_only_last_n_weights, model_name)
end = time.time()
print('\nEpoch %s/%s END, Time: %s' %
(e + 1, nb_epoch, end - start))
start = end
except KeyboardInterrupt:
pass
gen_weights_path = '../../models/%s/generator_latest.h5' % (model_name)
print("Saving", gen_weights_path)
generator_model.save(gen_weights_path, overwrite=True)