def main():
tf.random.set_seed(22)
np.random.seed(22)
os.environ['TF_CPP_MIN_LOG_LEVEL'] = '2'
assert tf.__version__.startswith('2.')
z_dim = 100
epochs = 3000000
batch_size = 512 # same as the batch_size of real images
d_learning_rate = 0.005
g_learning_rate = 0.002
training = True
img_path = glob.glob(r'.\faces\*.jpg')
dataset, img_shape, _ = make_anime_dataset(img_path, batch_size)
print(dataset, img_shape)
sample_picture = next(iter(dataset))
print(sample_picture.shape, tf.reduce_max(sample_picture).numpy(), tf.reduce_min(sample_picture).numpy())
dataset = dataset.repeat()
ds_iter = iter(dataset)
generator = Generator()
generator.build(input_shape=(None, z_dim))
discriminator = Discriminator()
discriminator.build(input_shape=(None, 64, 64, 3))
g_optimizer = tf.optimizers.RMSprop(learning_rate=g_learning_rate)
d_optimizer = tf.optimizers.RMSprop(learning_rate=d_learning_rate)
for epoch in range(epochs):
batch_z = tf.random.uniform([batch_size, z_dim], minval=-1., maxval=1.)
batch_r = next(ds_iter)
# discriminator training
with tf.GradientTape() as tape:
d_loss, gp = d_loss_func(generator, discriminator, batch_z, batch_r, training)
grads = tape.gradient(d_loss, discriminator.trainable_variables)
d_optimizer.apply_gradients(zip(grads, discriminator.trainable_variables))
if epoch % 5 == 0:
with tf.GradientTape() as tape:
g_loss = g_loss_func(generator, discriminator, batch_z, training)
grads = tape.gradient(g_loss, generator.trainable_variables)
g_optimizer.apply_gradients(zip(grads, generator.trainable_variables))
if epoch % 100 == 0:
print('Current epoch:', epoch,
'd_loss:', float(d_loss), 'g_loss:', float(g_loss),
'gp:', float(gp))
z = tf.random.uniform([100, z_dim])
g_imgs = generator(z, training=False)
save_path = os.path.join('images', 'wgan-%d.png' % epoch)
save_result(g_imgs.numpy(), 10, save_path, color_mode='P')
def main(batch_size=64, num_epochs=50, save_preds=True, train_method='ganhacks'):
str2method = {
'wgan': train_wgan_epoch,
'ganhacks': train_ganhacks_epoch
}
device = torch.device('cuda:0' if torch.cuda.is_available() else 'cpu')
print(f"Using {device}")
data_dir = 'mnist_data'
mean, std = get_mnist_vals(data_location=data_dir)
dataloader = torch.utils.data.DataLoader(
datasets.MNIST(data_dir, train=True, download=True,
transform=transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([mean], [std])
])),
batch_size=batch_size, shuffle=True)
noisemaker = NoiseMaker(batch_size=batch_size, device=device)
discriminator, generator = Discriminator(), Generator()
if device.type != 'cpu':
discriminator, generator = discriminator.cuda(), generator.cuda()
for i in range(num_epochs):
print(f"Epoch number {i + 1}")
# ncritic is only meaningful if train_method == 'wgan'
str2method[train_method](discriminator, generator, dataloader, noisemaker,
ncritic=100 if ((i == 0) or (i == 10)) else 5,
device=device)
# save some predictions
if save_preds:
with torch.no_grad():
generator.eval()
noise = noisemaker()
output = generator(noise).cpu().numpy()
# denormalize
output = (output * std) + mean
np.save(f"{train_method}_generator_output.npy", output)
def _train_initialize_variables(model_str, model_params, opt_params, cuda):
"""Helper function that just initializes everything at the beginning of the train function"""
# Params passed in as dict to model.
if model_str == 'WGAN':
D = WDisc(model_params)
G = WGen(model_params)
D.train()
G.train()
elif model_str == 'WDCGAN':
D = WDCDisc(model_params)
G = WDCGen(model_params)
D.train()
G.train()
else:
raise ValueError('Name unknown: %s' % model_str)
d_optimizer = init_optimizer(opt_params, D)
g_optimizer = init_optimizer(opt_params, G)
if cuda:
D = D.cuda()
G = G.cuda()
return G, D, g_optimizer, d_optimizer
transforms.ToTensor(),
transforms.Normalize([0.5], [0.5]),
])
train_dataset = datasets.CIFAR10(train_data_path,
train=True,
download=True,
transform=my_trans)
test_dataset = datasets.CIFAR10(test_data_path,
train=False,
download=True,
transform=my_trans)
train_dataloader = DataLoader(train_dataset, batch_size=batchs, shuffle=True)
# test_dataloader = DataLoader(test_dataset,batch_size=batch,shuffle=False)
#Initialize generator and discriminator
generator = Generator(latent, img_shape)
discriminator = Discriminator(img_shape)
if cuda:
generator.cuda()
discriminator.cuda()
#Optimizers
optimizer_G = optim.RMSprop(generator.parameters(), lr=learning_rate)
optimizer_D = optim.RMSprop(discriminator.parameters(), lr=learning_rate)
#Training
score_tr = np.zeros((epochs, 2))
batch_done = 0
total_errG = 0
total_errD = 0
count = 0
(0.5, 0.5, 0.5)),
]))
# Create the data loader
dataloader = torch.utils.data.DataLoader(dataset,
batch_size=cfg.batch_size,
shuffle=True,
num_workers=cfg.workers)
# Save to cache
torch.save(dataloader, dataloader_path)
# Decide which device we want to run on
device = torch.device("cuda:0" if (
torch.cuda.is_available() and cfg.ngpu > 0) else "cpu")
# Create the generator
netG = Generator(cfg.ngpu).to(device)
# Handle multi-gpu if desired
if (device.type == 'cuda') and (cfg.ngpu > 1):
netG = nn.DataParallel(netG, list(range(cfg.ngpu)))
# Initialize all weights to mean=0, std=0.2.
netG.apply(weights_init)
# Print the model
print(netG)
# Create the Discriminator
netD = Discriminator(cfg.ngpu).to(device)
# Handle multi-gpu if desired
else: dtype = torch.FloatTensor
#Models
file_base = "../../outputs/wgan_content_loss/"
load = True
# load = False
device_1 = torch.device("cuda:0")
device_2 = torch.device("cuda:1")
device_ids = [0]
if load:
generator = torch.load(file_base + "generator_2loss.pt")
discriminator = torch.load(file_base + "discriminator_2loss.pt")
else:
generator = Generator(img_shape)
discriminator = Discriminator(img_shape)
generator = nn.DataParallel(generator, device_ids=device_ids).type(dtype)
discriminator = nn.DataParallel(discriminator, device_ids=device_ids).type(dtype)
feature_extractor = FeatureExtractor().type(dtype)
# Optimizers
g_optimizer = torch.optim.Adam(generator.parameters(), lr=lr, betas=(b1, b2))
d_optimizer = torch.optim.Adam(discriminator.parameters(), lr=lr, betas=(b1, b2))
'''
Load Data
'''
def main():
tf.random.set_seed(233)
np.random.seed(233)
assert tf.__version__.startswith('2.')
# hyper parameters
z_dim = 100
epochs = 3000000
batch_size = 512
learning_rate = 0.0005
is_training = True
img_path = glob.glob(r'./faces/*.jpg')
assert len(img_path) > 0
dataset, img_shape, _ = make_anime_dataset(img_path, batch_size)
print(dataset, img_shape)
sample = next(iter(dataset))
print(sample.shape,
tf.reduce_max(sample).numpy(),
tf.reduce_min(sample).numpy())
dataset = dataset.repeat()
db_iter = iter(dataset)
generator = None
USE_LOADED = False
if (USE_LOADED and os.path.exists('./model.tf')):
print('加载模型，继续上次训练')
generator = tf.keras.models.load_model('./model.tf', compile=True)
else:
print('未找到保存的模型，重新开始训练')
generator = Generator()
generator.build(input_shape=(None, z_dim))
discriminator = Discriminator()
discriminator.build(input_shape=(None, 64, 64, 3))
g_optimizer = tf.keras.optimizers.Adam(learning_rate=learning_rate,
beta_1=0.5)
d_optimizer = tf.keras.optimizers.Adam(learning_rate=learning_rate,
beta_1=0.5)
for epoch in range(epochs):
for _ in range(5):
batch_z = tf.random.normal([batch_size, z_dim])
batch_x = next(db_iter)
# train D
with tf.GradientTape() as tape:
d_loss, gp = d_loss_fn(generator, discriminator, batch_z,
batch_x, is_training)
grads = tape.gradient(d_loss, discriminator.trainable_variables)
d_optimizer.apply_gradients(
zip(grads, discriminator.trainable_variables))
batch_z = tf.random.normal([batch_size, z_dim])
with tf.GradientTape() as tape:
g_loss = g_loss_fn(generator, discriminator, batch_z, is_training)
grads = tape.gradient(g_loss, generator.trainable_variables)
g_optimizer.apply_gradients(zip(grads, generator.trainable_variables))
if epoch % 100 == 0:
print(epoch, 'd-loss:', float(d_loss), 'g-loss:', float(g_loss),
'gp:', float(gp))
z = tf.random.normal([100, z_dim])
fake_image = generator(z, training=False)
img_path = os.path.join('images', 'wgan-%d.png' % epoch)
save_result(fake_image.numpy(), 10, img_path, color_mode='P')
# 子类实现的网络保存成h5格式不支持 参见 https://github.com/tensorflow/tensorflow/issues/29545
generator.predict(
z
) # 不调用一下，直接save 会报错，参见这里 https://github.com/tensorflow/tensorflow/issues/31057
generator.save('./model.tf', overwrite=True, save_format="tf")