args = parser.parse_args()
pretraining = not args.no_pretraining
log_dir = args.name
create_folder(args.name)
config_f = open(os.path.join(log_dir, 'config.json'), 'w')
json.dump(vars(args), config_f)
config_f.close()
# STAGE 1
log_dir = args.name+'_stage_1'
create_folder(log_dir)
cnet = SVCNN(args.name, nclasses=40, pretraining=pretraining, cnn_name=args.cnn_name)
optimizer = optim.Adam(cnet.parameters(), lr=args.lr, weight_decay=args.weight_decay)
n_models_train = args.num_models*args.num_views
train_dataset = SingleImgDataset(args.train_path, scale_aug=False, rot_aug=False, num_models=n_models_train, num_views=args.num_views)
train_loader = torch.utils.data.DataLoader(train_dataset, batch_size=64, shuffle=True, num_workers=0)
val_dataset = SingleImgDataset(args.val_path, scale_aug=False, rot_aug=False, test_mode=True)
val_loader = torch.utils.data.DataLoader(val_dataset, batch_size=64, shuffle=False, num_workers=0)
print('num_train_files: '+str(len(train_dataset.filepaths)))
print('num_val_files: '+str(len(val_dataset.filepaths)))
trainer = ModelNetTrainer(cnet, train_loader, val_loader, optimizer, nn.CrossEntropyLoss(), 'svcnn', log_dir, num_views=1)
trainer.train(30)
# STAGE 2
log_dir = args.name+'_stage_2'
pretraining = not args.no_pretraining
log_dir = args.name
create_folder(args.name)
config_f = open(os.path.join(log_dir, 'config.json'), 'w')
json.dump(vars(args), config_f)
config_f.close()
# STAGE 1
log_dir = args.name + '_stage_1'
create_folder(log_dir)
cnet = SVCNN(args.name,
nclasses=2,
pretraining=pretraining,
cnn_name=args.cnn_name)
optimizer = optim.Adam(cnet.parameters(),
lr=args.lr,
weight_decay=args.weight_decay)
n_models_train = args.num_models * args.num_views
train_dataset = SingleImgDataset(args.train_path,
scale_aug=False,
rot_aug=False,
num_models=n_models_train,
num_views=args.num_views)
train_loader = torch.utils.data.DataLoader(train_dataset,
batch_size=args.batchSize * 3,
shuffle=True,
num_workers=0)
def train(config):
log(config.log_file, 'Starting...')
pretraining = not config.no_pretraining
log_dir = config.name
create_folder(config.name)
log(config.log_file, '--------------stage 1--------------')
# STAGE 1
log_dir = os.path.join(config.log_dir, config.name + '_stage_1')
create_folder(log_dir)
cnet = SVCNN(config, pretraining=pretraining)
optimizer = optim.Adam(cnet.parameters(),
lr=config.learning_rate,
weight_decay=config.weight_decay)
train_path = os.path.join(config.data, "*/train")
train_dataset = SingleImgDataset(train_path,
config,
scale_aug=False,
rot_aug=False)
train_loader = torch.utils.data.DataLoader(
train_dataset,
batch_size=config.stage1_batch_size,
shuffle=True,
num_workers=0)
val_path = os.path.join(config.data, "*/test")
val_dataset = SingleImgDataset(val_path,
config,
scale_aug=False,
rot_aug=False,
test_mode=True)
val_loader = torch.utils.data.DataLoader(
val_dataset,
batch_size=config.stage1_batch_size,
shuffle=False,
num_workers=0)
log(config.log_file,
'num_train_files: ' + str(len(train_dataset.filepaths)))
log(config.log_file, 'num_val_files: ' + str(len(val_dataset.filepaths)))
trainer = ModelNetTrainer(cnet,
train_loader,
val_loader,
optimizer,
nn.CrossEntropyLoss(),
config,
log_dir,
num_views=1)
trainer.train(config, config.stage1_batch_size)
#cnet.load(os.path.join(log_dir, config.snapshot_prefix + str(30)))
# STAGE 2
log(config.log_file, '--------------stage 2--------------')
log_dir = os.path.join(config.log_dir, config.name + '_stage_2')
create_folder(log_dir)
cnet_2 = MVCNN(cnet, config)
del cnet
optimizer = optim.Adam(cnet_2.parameters(),
lr=config.learning_rate,
weight_decay=config.weight_decay,
betas=(0.9, 0.999))
train_dataset = MultiviewImgDataset(train_path,
config,
scale_aug=False,
rot_aug=False)
train_loader = torch.utils.data.DataLoader(
train_dataset,
batch_size=config.stage2_batch_size,
shuffle=False,
num_workers=0
) # shuffle needs to be false! it's done within the trainer
val_dataset = MultiviewImgDataset(val_path,
config,
scale_aug=False,
rot_aug=False)
val_loader = torch.utils.data.DataLoader(
val_dataset,
batch_size=config.stage2_batch_size,
shuffle=False,
num_workers=0)
log(config.log_file,
'num_train_files: ' + str(len(train_dataset.filepaths)))
log(config.log_file, 'num_val_files: ' + str(len(val_dataset.filepaths)))
trainer = ModelNetTrainer(cnet_2,
train_loader,
val_loader,
optimizer,
nn.CrossEntropyLoss(),
config,
log_dir,
num_views=config.num_views)
trainer.train(config, config.stage2_batch_size)
cnet = SVCNN(args.name,
vgg,
num_feature,
nclasses=40,
pretraining=pretraining,
cnn_name=args.cnn_name)
if (torch.cuda.is_available()):
cnet = cnet.cuda()
print('use GPU to train ')
else:
print('don.t use gpu')
#有centor loss 时
center_loss = Triplet_Center_Loss()
softmax_loss = nn.CrossEntropyLoss()
optimizer_model = optim.SGD(cnet.parameters(),
lr=args.lr,
weight_decay=args.weight_decay,
momentum=0.9)
optimizer_centerloss = optim.SGD(center_loss.parameters(),
lr=args.lr_center)
# #triplet_loss
# soft_margin_triplet_loss=soft_margin_triplet(max_dist=2)
# optimizer_model = optim.SGD(cnet.parameters(), lr=args.lr, weight_decay=args.weight_decay, momentum=0.9)
n_models_train = args.num_models * args.num_views
train_dataset = SingleImgDataset(args.train_path,
scale_aug=False,
rot_aug=False,