def main():
global args
best_prec1, best_epoch = 0.0, 0
if not os.path.exists(args.save):
os.makedirs(args.save)
if args.data.startswith('cifar'):
IM_SIZE = 32
else:
IM_SIZE = 224
print(args.arch)
model = getattr(models, args.arch)(args)
args.num_exits = len(model.classifier)
global n_flops
n_flops, n_params = measure_model(model, IM_SIZE, IM_SIZE)
torch.save(n_flops, os.path.join(args.save, 'flops.pth'))
del(model)
print(args)
with open('{}/args.txt'.format(args.save), 'w') as f:
print(args, file=f)
model = getattr(models, args.arch)(args)
model = torch.nn.DataParallel(model.cuda())
criterion = nn.CrossEntropyLoss().cuda()
optimizer = torch.optim.SGD(model.parameters(), lr=args.lr, momentum=args.momentum, weight_decay=args.weight_decay)
if args.resume:
checkpoint = load_checkpoint(args)
if checkpoint is not None:
args.start_epoch = checkpoint['epoch'] + 1
best_prec1 = checkpoint['best_prec1']
model.load_state_dict(checkpoint['state_dict'])
optimizer.load_state_dict(checkpoint['optimizer'])
cudnn.benchmark = True
train_loader, val_loader, test_loader = get_dataloaders(args)
if args.evalmode is not None:
state_dict = torch.load(args.evaluate_from)['state_dict']
model.load_state_dict(state_dict)
if args.evalmode == 'anytime':
validate(test_loader, model, criterion)
elif args.evalmode == 'dynamic':
dynamic_evaluate(model, test_loader, val_loader, args)
else:
validate(test_loader, model, criterion)
dynamic_evaluate(model, test_loader, val_loader, args)
return
scores = ['epoch\tlr\ttrain_loss\tval_loss\ttrain_prec1'
'\tval_prec1\ttrain_prec5\tval_prec5']
for epoch in range(args.start_epoch, args.epochs):
train_loss, train_prec1, train_prec5, lr = train(train_loader, model, criterion, optimizer, epoch)
val_loss, val_prec1, val_prec5 = validate(val_loader, model, criterion)
scores.append(('{}\t{:.3f}' + '\t{:.4f}' * 6)
.format(epoch, lr, train_loss, val_loss,
train_prec1, val_prec1, train_prec5, val_prec5))
is_best = val_prec1 > best_prec1
if is_best or (epoch == 299):
best_prec1 = val_prec1
best_epoch = epoch
print('Best var_prec1 {}'.format(best_prec1))
model_filename = 'checkpoint_%03d.pth.tar' % epoch
save_checkpoint({
'epoch': epoch,
'arch': args.arch,
'state_dict': model.state_dict(),
'best_prec1': best_prec1,
'optimizer': optimizer.state_dict(),
}, args, is_best, model_filename, scores)
model_path = '%s/save_models/checkpoint_%03d.pth.tar' % (args.save, epoch-1)
if os.path.exists(model_path):
os.remove(model_path)
print('Best val_prec1: {:.4f} at epoch {}'.format(best_prec1, best_epoch))
### Test the final model
print('********** Final prediction results **********')
validate(test_loader, model, criterion)
return
def main(args):
#######################################################################################
## 注释：
## 载入模型
#######################################################################################
best_prec1, best_epoch = 0.0, 0
model = getattr(models, args.arch)(args)
n_flops, n_params = measure_model(model, IM_SIZE, IM_SIZE)
torch.save(n_flops, os.path.join(args.save, 'flops.pth'))
del (model)
model = getattr(models, args.arch)(args)
if args.arch.startswith('alexnet') or args.arch.startswith('vgg'):
model.features = torch.nn.DataParallel(model.features)
model.cuda()
else:
model = torch.nn.DataParallel(model).cuda()
#######################################################################################
## 注释：
## 载入criterion
#######################################################################################
criterion = nn.CrossEntropyLoss().cuda()
#######################################################################################
## 注释：
## 载入optimizer
#######################################################################################
optimizer = torch.optim.SGD(model.parameters(),
args.lr,
momentum=args.momentum,
weight_decay=args.weight_decay)
#######################################################################################
## 注释：
## 接 中断的训练
#######################################################################################
if args.resume:
checkpoint = load_checkpoint(args)
if checkpoint is not None:
args.start_epoch = checkpoint['epoch'] + 1
best_prec1 = checkpoint['best_prec1']
model.load_state_dict(checkpoint['state_dict'])
optimizer.load_state_dict(checkpoint['optimizer'])
cudnn.benchmark = True
#######################################################################################
## 注释：
## 导入数据集
#######################################################################################
train_loader, val_loader, test_loader = get_dataloaders(args)
#######################################################################################
## 注释：
## 选择推理模式 imagenet--dynamic
#######################################################################################
if args.evalmode is not None:
state_dict = torch.load(args.evaluate_from)['state_dict']
model.load_state_dict(state_dict)
if args.evalmode == 'anytime':
validate(test_loader, model, criterion)
else:
dynamic_evaluate(model, test_loader, val_loader, args)
return
scores = [
'epoch\tlr\ttrain_loss\tval_loss\ttrain_prec1'
'\tval_prec1\ttrain_prec5\tval_prec5'
]
for epoch in range(args.start_epoch, args.epochs):
train_loss, train_prec1, train_prec5, lr = train(
train_loader, model, criterion, optimizer, epoch)
val_loss, val_prec1, val_prec5 = validate(val_loader, model, criterion)
scores.append(
('{}\t{:.3f}' + '\t{:.4f}' * 6).format(epoch, lr, train_loss,
val_loss, train_prec1,
val_prec1, train_prec5,
val_prec5))
is_best = val_prec1 > best_prec1
if is_best:
best_prec1 = val_prec1
best_epoch = epoch
print('Best var_prec1 {}'.format(best_prec1))
model_filename = 'checkpoint_%03d.pth.tar' % epoch
save_checkpoint(
{
'epoch': epoch,
'arch': args.arch,
'state_dict': model.state_dict(),
'best_prec1': best_prec1,
'optimizer': optimizer.state_dict(),
}, args, is_best, model_filename, scores)
print('Best val_prec1: {:.4f} at epoch {}'.format(best_prec1, best_epoch))
### Test the final model
print('********** Final prediction results **********')
validate(test_loader, model, criterion)
return
def main():
global args
best_prec1, best_epoch = 0.0, 0
if not os.path.exists(args.save):
os.makedirs(args.save)
if args.data.startswith('cifar'):
IM_SIZE = 32
else:
IM_SIZE = 224
model = getattr(models, args.arch)(args)
# 根据模型结构计算flops params
n_flops, n_params = measure_model(model, IM_SIZE, IM_SIZE)
# 存储下模型的flops
torch.save(n_flops, os.path.join(args.save, 'flops.pth'))
del (model)
model = getattr(models, args.arch)(args)
if args.arch.startswith('alexnet') or args.arch.startswith('vgg'):
model.features = torch.nn.DataParallel(model.features)
model.cuda()
else:
model = torch.nn.DataParallel(model).cuda()
criterion = nn.CrossEntropyLoss().cuda()
optimizer = torch.optim.SGD(model.parameters(),
args.lr,
momentum=args.momentum,
weight_decay=args.weight_decay)
# 断点继续
if args.resume:
checkpoint = load_checkpoint(args)
if checkpoint is not None:
args.start_epoch = checkpoint['epoch'] + 1
best_prec1 = checkpoint['best_prec1']
model.load_state_dict(checkpoint['state_dict'])
optimizer.load_state_dict(checkpoint['optimizer'])
cudnn.benchmark = True
train_loader, val_loader, test_loader = get_dataloaders(args)
# evalmode两种 分别为anytime和dynamic
if args.evalmode is not None:
# args.evaluate_from为模型存储路径
state_dict = torch.load(args.evaluate_from)['state_dict']
model.load_state_dict(state_dict)
# 不同的处理方式
if args.evalmode == 'anytime':
validate(test_loader, model, criterion)
else:
dynamic_evaluate(model, test_loader, val_loader, args)
return
# 训练看这里
scores = [
'epoch\tlr\ttrain_loss\tval_loss\ttrain_prec1'
'\tval_prec1\ttrain_prec5\tval_prec5'
]
for epoch in range(args.start_epoch, args.epochs):
train_loss, train_prec1, train_prec5, lr = train(
train_loader, model, criterion, optimizer, epoch)
val_loss, val_prec1, val_prec5 = validate(val_loader, model, criterion)
scores.append(
('{}\t{:.3f}' + '\t{:.4f}' * 6).format(epoch, lr, train_loss,
val_loss, train_prec1,
val_prec1, train_prec5,
val_prec5))
is_best = val_prec1 > best_prec1
if is_best:
best_prec1 = val_prec1
best_epoch = epoch
print('Best var_prec1 {}'.format(best_prec1))
model_filename = 'checkpoint_%03d.pth.tar' % epoch
save_checkpoint(
{
'epoch': epoch,
'arch': args.arch,
'state_dict': model.state_dict(),
'best_prec1': best_prec1,
'optimizer': optimizer.state_dict(),
}, args, is_best, model_filename, scores)
print('Best val_prec1: {:.4f} at epoch {}'.format(best_prec1, best_epoch))
### Test the final model
print('********** Final prediction results **********')
validate(test_loader, model, criterion)
return
args.scale_list = '1-2-3-4'
args.reduction = 0.5
args.grFactor = list(map(int, args.grFactor.split('-')))
args.bnFactor = list(map(int, args.bnFactor.split('-')))
args.scale_list = list(map(int, args.scale_list.split('-')))
args.nScales = len(args.grFactor)
# print(args.grFactor)
if args.use_valid:
args.splits = ['train', 'val', 'test']
else:
args.splits = ['train', 'val']
if args.data == 'cifar10':
args.num_classes = 10
elif args.data == 'cifar100':
args.num_classes = 100
else:
args.num_classes = 1000
inp_c = torch.rand(16, 3, 224, 224)
model = MSDNet(args)
# output = model(inp_c)
# oup = net_head(inp_c)
# print(len(oup))
n_flops, n_params = measure_model(model, 224, 224)
# net = _BlockNormal(num_layers = 4, nIn = 64, growth_rate = 24, reduction_rate = 0.5, trans_down = True)
def main():
global args
best_prec1, best_epoch = 0.0, 0
if not os.path.exists(args.save):
os.makedirs(args.save)
if args.data.startswith('cifar'):
IM_SIZE = 32
else:
IM_SIZE = 224
model = getattr(models, args.arch)(args)
global n_flops
n_flops, n_params = measure_model(model, IM_SIZE, IM_SIZE)
torch.save(n_flops, os.path.join(args.save, 'flops.pth'))
del (model)
with open('{}/args.txt'.format(args.save), 'w') as f:
print(args, file=f) #打开文件，写入
pred_model = getattr(models, args.arch)(args).cuda()
pred_model = torch.nn.DataParallel(pred_model)
state_dict = torch.load(args.pretrained)['state_dict']
pred_model.load_state_dict(state_dict)
print("=> loaded pretrained checkpoint '{}'".format(args.pretrained))
model = getattr(models, args.arch)(args).cuda()
data = torch.randn(2, 3, IM_SIZE, IM_SIZE).cuda()
model.eval()
with torch.no_grad():
_, feat = model(data)
trainable_list = nn.ModuleList([])
trainable_list.append(model)
pad_reg = nn.ModuleList([
AD(feat[j].size(1), feat[-1].size(1)).cuda()
for j in range(args.nBlocks)
])
trainable_list.append(pad_reg)
criterion = nn.CrossEntropyLoss().cuda()
optimizer = torch.optim.SGD(trainable_list.parameters(),
args.lr,
momentum=args.momentum,
weight_decay=args.weight_decay)
#model, optimizer = amp.initialize(model, optimizer, opt_level="O1")
if args.arch.startswith('alexnet') or args.arch.startswith('vgg'):
model.features = torch.nn.DataParallel(model.features)
else:
model = torch.nn.DataParallel(model)
if args.resume:
checkpoint = load_checkpoint(args)
if checkpoint is not None:
args.start_epoch = checkpoint['epoch'] + 1
best_prec1 = checkpoint['best_prec1']
model.load_state_dict(checkpoint['state_dict'])
optimizer.load_state_dict(checkpoint['optimizer'])
cudnn.benchmark = True
train_loader, val_loader, test_loader = get_dataloaders(args)
if args.evalmode is not None:
state_dict = torch.load(args.evaluate_from)['state_dict']
model.load_state_dict(state_dict)
if args.evalmode == 'anytime':
validate(test_loader, model, criterion)
else:
dynamic_evaluate(model, test_loader, val_loader, args)
return
scores = [
'epoch\tlr\ttrain_loss\tval_loss\ttrain_prec1'
'\tval_prec1\ttrain_prec5\tval_prec5'
]
for epoch in range(args.start_epoch, args.epochs):
train_loss, train_prec1, train_prec5, lr = train(
train_loader, model, pred_model, criterion, optimizer, epoch,
pad_reg)
val_loss, val_prec1, val_prec5 = validate(val_loader, model, criterion)
scores.append(
('{}\t{:.3f}' + '\t{:.4f}' * 6).format(epoch, lr, train_loss,
val_loss, train_prec1,
val_prec1, train_prec5,
val_prec5))
is_best = val_prec1 > best_prec1
if is_best:
best_prec1 = val_prec1
best_epoch = epoch
print('Best var_prec1 {}'.format(best_prec1))
model_filename = 'checkpoint_%03d.pth.tar' % epoch
save_checkpoint({ #save_checkpoint(state, args, is_best, filename, result)
'epoch': epoch,
'arch': args.arch,
'state_dict': model.state_dict(),
'best_prec1': best_prec1,
'optimizer': optimizer.state_dict(),
}, args, is_best, model_filename, scores)
model_path = '%s/save_models/checkpoint_%03d.pth.tar' % (args.save,
epoch - 1)
if os.path.exists(model_path):
os.remove(model_path)
print('Best val_prec1: {:.4f} at epoch {}'.format(best_prec1, best_epoch))
### Test the final model
print('********** {} Final prediction results **********'.format(
time.strftime('%m%d_%H:%M:%S')))
validate(test_loader, model, criterion)
return
def train(config):
# set pre-process
prep_dict = {}
prep_config = config["prep"]
prep_dict["source"] = prep.image_train(**config["prep"]['params'])
prep_dict["target"] = prep.image_train(**config["prep"]['params'])
if prep_config["test_10crop"]:
prep_dict["test"] = prep.image_test_10crop(**config["prep"]['params'])
else:
prep_dict["test"] = prep.image_test(**config["prep"]['params'])
# prepare data
dsets = {}
dset_loaders = {}
data_config = config["data"]
train_bs = data_config["source"]["batch_size"] * 2
test_bs = data_config["test"]["batch_size"]
dsets["source"] = ImageList(open(
data_config["source"]["list_path"]).readlines(),
transform=prep_dict["source"])
dset_loaders["source"] = DataLoader(dsets["source"],
batch_size=int(train_bs / 2),
shuffle=True,
num_workers=4,
drop_last=True)
dsets["target"] = ImageList(open(
data_config["target"]["list_path"]).readlines(),
transform=prep_dict["target"])
dset_loaders["target"] = DataLoader(dsets["target"],
batch_size=int(train_bs / 2),
shuffle=True,
num_workers=4,
drop_last=True)
if prep_config["test_10crop"]:
for i in range(10):
dsets["test"] = [
ImageList(open(data_config["test"]["list_path"]).readlines(),
transform=prep_dict["test"][i]) for i in range(10)
]
dset_loaders["test"] = [
DataLoader(dset,
batch_size=test_bs,
shuffle=False,
num_workers=4) for dset in dsets['test']
]
dsets["validation"] = [
ImageList(open(data_config["target"]["list_path"]).readlines(),
transform=prep_dict["test"][i]) for i in range(10)
]
dset_loaders["validation"] = [
DataLoader(dset,
batch_size=test_bs,
shuffle=False,
num_workers=4) for dset in dsets['validation']
]
else:
dsets["test"] = ImageList(open(
data_config["test"]["list_path"]).readlines(),
transform=prep_dict["test"])
dset_loaders["test"] = DataLoader(dsets["test"],
batch_size=test_bs,
shuffle=False,
num_workers=4)
dsets["validation"] = ImageList(open(
data_config["target"]["list_path"]).readlines(),
transform=prep_dict["test"])
dset_loaders["validation"] = DataLoader(dsets["validation"],
batch_size=test_bs,
shuffle=False,
num_workers=4)
prep_dict["detection"] = prep.image_test(**config["prep"]['params'])
dsets["detection"] = ImageList(open(
data_config["target"]["list_path"]).readlines(),
transform=prep_dict["detection"])
dset_loaders["detection"] = DataLoader(dsets["detection"],
batch_size=test_bs,
shuffle=False,
num_workers=0)
# set base network
net_config = config["network"]
base_network = msdnet.MSDNet(net_config)
if net_config["pattern"] == "budget":
IM_SIZE = 224
n_flops, n_params = measure_model(base_network, IM_SIZE, IM_SIZE)
torch.save(n_flops, os.path.join(config["output_path"], 'flops.pth'))
base_network = base_network.cuda()
state_dict = torch.load(net_config["preTrained"])['state_dict']
state_dict_adapt = {}
for key in state_dict.keys():
if key[:17] == "module.classifier":
pass
else:
state_dict_adapt[key[7:]] = state_dict[key]
# set base_network
base_network.load_state_dict(state_dict_adapt, strict=False)
# set classifier
classifier = network.GroupClassifiers(
nblocks=base_network.get_nBlocks(),
num_classes=config["network"]["params"]["class_num"],
channel=base_network.output_num())
classifier = classifier.cuda()
# set adversrial
ad_net = network.GroupAdversarialNetworks(
nblocks=base_network.get_nBlocks(), channel=base_network.output_num())
ad_net = ad_net.cuda()
parameter_list = base_network.get_parameters() + classifier.get_parameters(
) + ad_net.get_parameters()
# set optimizer
optimizer_config = config["optimizer"]
optimizer = optimizer_config["type"](parameter_list,
**(optimizer_config["optim_params"]))
param_lr = []
for param_group in optimizer.param_groups:
param_lr.append(param_group["lr"])
schedule_param = optimizer_config["lr_param"]
lr_scheduler = lr_schedule.schedule_dict[optimizer_config["lr_type"]]
# set self-training
st_select = 0
st_config = config["self-training"]
has_pseudo = False
# train
len_train_source = len(dset_loaders["source"])
len_train_target = len(dset_loaders["target"])
source_iter = 0
pseudo_iter = 0
for i in range(config["num_iterations"]):
if i % config["test_interval"] == config["test_interval"] - 1:
temp_acc = image_classification_test(
dset_loaders,
base_network,
classifier,
test_10crop=prep_config["test_10crop"])
if config['dataset'] == 'visda':
log_str = "iter: {:05d}".format(i)
correct = [0.0 for i in range(base_network.get_nBlocks())]
allsample = [0.0 for i in range(base_network.get_nBlocks())]
meanclass = [0.0 for i in range(base_network.get_nBlocks())]
for j in range(base_network.get_nBlocks()):
log_str += "\n {} classifier:".format(j)
for k in visda_classes:
correct[j] += temp_acc[j][k][0]
allsample[j] += temp_acc[j][k][1]
meanclass[
j] += 100. * temp_acc[j][k][0] / temp_acc[j][k][1]
log_str += '\t{}: [{}/{}] ({:.6f}%)'.format(
k, temp_acc[j][k][0], temp_acc[j][k][1],
100. * temp_acc[j][k][0] / temp_acc[j][k][1])
log_str += "\nall: "
for j in range(base_network.get_nBlocks()):
log_str += "{:02d}-pre:{:.05f}".format(
j, 100. * correct[j] / allsample[j])
log_str += "\ncls: "
for j in range(base_network.get_nBlocks()):
log_str += "{:02d}-pre:{:.05f}".format(
j, meanclass[j] /
config["network"]["params"]["class_num"])
config["out_file"].write(log_str + "\n")
config["out_file"].flush()
else:
log_str = "iter: {:05d}".format(i)
for j in range(base_network.get_nBlocks()):
log_str += " {:02d}-pre:{:.05f}".format(j, temp_acc[j])
config["out_file"].write(log_str + "\n")
print(log_str)
if (i + 1) % config["snapshot_interval"] == 0 and config["save_model"]:
torch.save(
base_network,
osp.join(config["output_path"],
"iter_{:05d}_model.pth.tar".format(i)))
# dynamic evaluation
if (i + 1) % 3000 == 0 and net_config["pattern"] == "budget":
torch.multiprocessing.set_sharing_strategy('file_system')
dynamic_evaluate(base_network, classifier, dset_loaders["test"],
dset_loaders["validation"], config,
'target-validation@' + str(i))
torch.multiprocessing.set_sharing_strategy('file_descriptor')
if (source_iter % len_train_source == 0) and i >= st_config["start"]:
st_select += 1
has_pseudo = True
pseudo_path, len_train_pseudo, correct = selfDetection(
dset_loaders, base_network, classifier, config, i)
log_str = "size: {} correct:{}".format(len_train_pseudo, correct)
config["out_file"].write(log_str + "\n")
config["out_file"].flush()
print(log_str)
# set batch
source_batchsize = int(
int(train_bs / 2) * len_train_source /
(len_train_source + len_train_pseudo))
if source_batchsize == int(train_bs / 2):
source_batchsize -= 1
if source_batchsize < int(int(train_bs / 2) / 2):
source_batchsize = int(int(train_bs / 2) / 2)
pseudo_batchsize = int(train_bs / 2) - source_batchsize
dsets["source"] = ImageList(open(
data_config["source"]["list_path"]).readlines(),
transform=prep_dict["source"])
dset_loaders["source"] = DataLoader(dsets["source"],
batch_size=source_batchsize,
shuffle=True,
num_workers=4,
drop_last=True)
dsets["target"] = ImageList(open(
data_config["target"]["list_path"]).readlines(),
transform=prep_dict["target"])
dset_loaders["target"] = DataLoader(dsets["target"],
batch_size=source_batchsize,
shuffle=True,
num_workers=4,
drop_last=True)
dsets["pseudo"] = ImageList(open(pseudo_path).readlines(),
transform=prep_dict["target"])
dset_loaders["pseudo"] = DataLoader(dsets["pseudo"],
batch_size=pseudo_batchsize,
shuffle=True,
num_workers=4,
drop_last=True)
dsets["source_pseudo"] = ImageList(open(
data_config["source"]["list_path"]).readlines(),
transform=prep_dict["source"])
dset_loaders["source_pseudo"] = DataLoader(
dsets["source_pseudo"],
batch_size=pseudo_batchsize,
shuffle=True,
num_workers=4,
drop_last=True)
len_train_source = len(dset_loaders["source"])
len_train_target = len(dset_loaders["target"])
len_train_pseudo = len(dset_loaders["pseudo"])
len_train_source_pseudo = len(dset_loaders["source_pseudo"])
source_iter = 0
pseudo_iter = 0
iter_source = iter(dset_loaders["source"])
iter_target = iter(dset_loaders["target"])
iter_pseudo = iter(dset_loaders["pseudo"])
iter_source_pseudo = iter(dset_loaders["source_pseudo"])
# set self-training oprimizer
if st_config["is_lr"] and st_select == 0:
param_lr = []
optimizer = optimizer_config["type"](
parameter_list, **(st_config["optimizer"]["optim_params"]))
for param_group in optimizer.param_groups:
param_lr.append(param_group["lr"])
schedule_param = st_config["optimizer"]["lr_param"]
lr_scheduler = lr_schedule.schedule_dict[st_config["optimizer"]
["lr_type"]]
loss_params = config["loss"]
# train one iter
base_network.train(True)
classifier.train(True)
ad_net.train(True)
optimizer = lr_scheduler(optimizer, i, **schedule_param)
optimizer.zero_grad()
if has_pseudo:
if source_iter % len_train_source == 0:
iter_source = iter(dset_loaders["source"])
if source_iter % len_train_target == 0:
iter_target = iter(dset_loaders["target"])
if pseudo_iter % len_train_pseudo == 0:
iter_pseudo = iter(dset_loaders["pseudo"])
if pseudo_iter % len_train_source_pseudo == 0:
iter_source_pseudo = iter(dset_loaders["source_pseudo"])
source_iter += 1
pseudo_iter += 1
inputs_source, labels_source, _, _ = iter_source.next()
inputs_target, _, _, _ = iter_target.next()
inputs_pseudo, labels_pseudo, _, randcls = iter_pseudo.next()
inputs_source_pseudo, _, _, _ = iter_source_pseudo.next()
inputs_source = torch.cat((inputs_source, inputs_pseudo), dim=0)
labels_source = torch.cat((labels_source, labels_pseudo), dim=0)
inputs_target = torch.cat((inputs_target, inputs_source_pseudo),
dim=0)
else:
if i % len_train_source == 0:
iter_source = iter(dset_loaders["source"])
if i % len_train_target == 0:
iter_target = iter(dset_loaders["target"])
inputs_source, labels_source, _, _ = iter_source.next()
inputs_target, _, _, _ = iter_target.next()
inputs_source, inputs_target, labels_source = inputs_source.cuda(), \
inputs_target.cuda(), \
labels_source.cuda(),
features_source = base_network(inputs_source)
outputs_source = classifier(features_source)
domain_source = ad_net(features_source)
features_target = base_network(inputs_target)
domain_target = ad_net(features_target)
classifier_loss = 0.0
transfer_loss = 0.0
if has_pseudo and st_config["is_weight"]:
mean_pseudo = nn.Softmax(dim=1)(
outputs_source[0][source_batchsize:].detach())
for j in range(base_network.get_nBlocks()):
if j != 0:
mean_pseudo += nn.Softmax(dim=1)(
outputs_source[j][source_batchsize:].detach())
mean_pseudo = mean_pseudo / base_network.get_nBlocks()
for j in range(base_network.get_nBlocks()):
if has_pseudo and st_config["is_weight"]:
source_mask = torch.FloatTensor([1.] * source_batchsize)
pseudo_mask = [1 if k == j else 0 for k in randcls]
pseudo_mask = torch.tensor(pseudo_mask).float()
mask = torch.cat((source_mask, pseudo_mask), dim=0).cuda()
classifier_loss += loss.Weighted_loss(outputs_source[j],
labels_source, mask)
else:
classifier_loss += nn.CrossEntropyLoss()(outputs_source[j],
labels_source)
domain = torch.cat((domain_source[j], domain_target[j]), dim=0)
batch_size = domain.size(0) // 2
if has_pseudo:
dc_target = torch.from_numpy(
np.array([[1]] * source_batchsize +
[[0]] * pseudo_batchsize +
[[0]] * source_batchsize +
[[1]] * pseudo_batchsize)).float().cuda()
else:
dc_target = torch.from_numpy(
np.array([[1]] * batch_size +
[[0]] * batch_size)).float().cuda()
transfer_loss += nn.BCELoss()(domain, dc_target)
total_loss = classifier_loss + loss_params["trade_off"] * transfer_loss
total_loss.backward()
optimizer.step()