def train(cfg, local_rank, distributed):
model = build_detection_model(cfg)
device = torch.device(cfg.MODEL.DEVICE)
model.to(device)
if cfg.MODEL.USE_SYNCBN:
assert is_pytorch_1_1_0_or_later(), \
"SyncBatchNorm is only available in pytorch >= 1.1.0"
model = torch.nn.SyncBatchNorm.convert_sync_batchnorm(model)
optimizer = make_optimizer(cfg, model)
scheduler = make_lr_scheduler(cfg, optimizer)
if distributed:
model = torch.nn.parallel.DistributedDataParallel(
model,
device_ids=[local_rank],
output_device=local_rank,
# this should be removed if we update BatchNorm stats
broadcast_buffers=False,
# find_unused_parameters=True,
)
arguments = {}
arguments["iteration"] = 0
output_dir = cfg.OUTPUT_DIR
save_to_disk = get_rank() == 0
checkpointer = DetectronCheckpointer(cfg, model, optimizer, scheduler,
output_dir, save_to_disk)
extra_checkpoint_data = checkpointer.load(cfg.MODEL.WEIGHT)
arguments.update(extra_checkpoint_data)
data_loader = make_data_loader(
cfg,
is_train=True,
is_distributed=distributed,
start_iter=arguments["iteration"],
)
checkpoint_period = cfg.SOLVER.CHECKPOINT_PERIOD
vis_period = cfg.VISUALIZE.PERIOD
if 0 < vis_period < cfg.SOLVER.MAX_ITER:
visualizer = SummaryWriterX(
cfg.VISUALIZE.DIR + '/' + cfg.VISUALIZE.ENV, cfg.VISUALIZE.ENV,
vis_period, 20, get_category(cfg.DATASETS.TRAIN[0]))
else:
visualizer = None
meters = MetricLogger(delimiter=" ",
save_dir=os.path.join(output_dir, 'meters.json'))
meters.load(is_main_process=get_rank() == 0)
do_train(model, data_loader, optimizer, scheduler, checkpointer, device,
checkpoint_period, arguments, meters, visualizer)
return model
def test_update(self):
meter = MetricLogger()
for i in range(10):
meter.update(metric=float(i))
m = meter.meters["metric"]
self.assertEqual(m.count, 10)
self.assertEqual(m.total, 45)
self.assertEqual(m.median, 4)
self.assertEqual(m.avg, 4.5)
def test_no_attr(self):
meter = MetricLogger()
_ = meter.meters
_ = meter.delimiter
def broken():
_ = meter.not_existent
self.assertRaises(AttributeError, broken)
def validate(model, loss_fn, metric, dataloader, log_period=-1):
logger = logging.getLogger('shaper.validate')
meters = MetricLogger(delimiter=' ')
metric.reset()
meters.bind(metric)
model.eval()
loss_fn.eval()
end = time.time()
with torch.no_grad():
for iteration, data_batch in enumerate(dataloader):
data_time = time.time() - end
data_batch = {
k: v.cuda(non_blocking=True)
for k, v in data_batch.items()
}
preds = model(data_batch)
loss_dict = loss_fn(preds, data_batch)
total_loss = sum(loss_dict.values())
meters.update(node_acc=preds['node_acc'],
node_pos_acc=preds['node_pos_acc'],
node_neg_acc=preds['node_neg_acc'],
center_valid_ratio=preds['center_valid_ratio'])
meters.update(loss=total_loss, **loss_dict)
metric.update_dict(preds, data_batch)
batch_time = time.time() - end
meters.update(time=batch_time, data=data_time)
end = time.time()
if log_period > 0 and iteration % log_period == 0:
logger.info(
meters.delimiter.join([
'iter: {iter:4d}',
'{meters}',
]).format(
iter=iteration,
meters=str(meters),
))
return meters
def train(cfg, local_rank, distributed):
logger = logging.getLogger("SDCA.trainer")
# create network
device = torch.device(cfg.MODEL.DEVICE)
feature_extractor = build_feature_extractor(cfg)
feature_extractor.to(device)
classifier = build_classifier(cfg)
classifier.to(device)
if local_rank == 0:
print(classifier)
# batch size: half for source and half for target
batch_size = cfg.SOLVER.BATCH_SIZE // 2
if distributed:
pg1 = torch.distributed.new_group(range(torch.distributed.get_world_size()))
batch_size = int(cfg.SOLVER.BATCH_SIZE / torch.distributed.get_world_size()) // 2
if not cfg.MODEL.FREEZE_BN:
feature_extractor = torch.nn.SyncBatchNorm.convert_sync_batchnorm(feature_extractor)
feature_extractor = torch.nn.parallel.DistributedDataParallel(
feature_extractor, device_ids=[local_rank], output_device=local_rank,
find_unused_parameters=True, process_group=pg1
)
pg2 = torch.distributed.new_group(range(torch.distributed.get_world_size()))
classifier = torch.nn.parallel.DistributedDataParallel(
classifier, device_ids=[local_rank], output_device=local_rank,
find_unused_parameters=True, process_group=pg2
)
torch.autograd.set_detect_anomaly(True)
torch.distributed.barrier()
# init optimizer
optimizer_fea = torch.optim.SGD(feature_extractor.parameters(), lr=cfg.SOLVER.BASE_LR, momentum=cfg.SOLVER.MOMENTUM,
weight_decay=cfg.SOLVER.WEIGHT_DECAY)
optimizer_fea.zero_grad()
optimizer_cls = torch.optim.SGD(classifier.parameters(), lr=cfg.SOLVER.BASE_LR * 10, momentum=cfg.SOLVER.MOMENTUM,
weight_decay=cfg.SOLVER.WEIGHT_DECAY)
optimizer_cls.zero_grad()
# load checkpoint
if cfg.resume:
logger.info("Loading checkpoint from {}".format(cfg.resume))
checkpoint = torch.load(cfg.resume, map_location=torch.device('cpu'))
feature_weights = checkpoint['feature_extractor'] if distributed else strip_prefix_if_present(
checkpoint['feature_extractor'], 'module.')
feature_extractor.load_state_dict(feature_weights)
classifier_weights = checkpoint['classifier'] if distributed else strip_prefix_if_present(
checkpoint['classifier'], 'module.')
classifier.load_state_dict(classifier_weights)
# init data loader
src_train_data = build_dataset(cfg, mode='train', is_source=True)
tgt_train_data = build_dataset(cfg, mode='train', is_source=False)
if distributed:
src_train_sampler = torch.utils.data.distributed.DistributedSampler(src_train_data)
tgt_train_sampler = torch.utils.data.distributed.DistributedSampler(tgt_train_data)
else:
src_train_sampler = None
tgt_train_sampler = None
src_train_loader = torch.utils.data.DataLoader(src_train_data, batch_size=batch_size,
shuffle=(src_train_sampler is None), num_workers=4,
pin_memory=True, sampler=src_train_sampler, drop_last=True)
tgt_train_loader = torch.utils.data.DataLoader(tgt_train_data, batch_size=batch_size,
shuffle=(tgt_train_sampler is None), num_workers=4,
pin_memory=True, sampler=tgt_train_sampler, drop_last=True)
# init loss
ce_criterion = nn.CrossEntropyLoss(ignore_index=255)
pcl_criterion = PixelContrastiveLoss(cfg)
# load semantic distributions
logger.info(">>>>>>>>>>>>>>>> Load semantic distributions >>>>>>>>>>>>>>>>")
_, backbone_name = cfg.MODEL.NAME.split('_')
feature_num = 2048 if backbone_name.startswith('resnet') else 1024
feat_estimator = semantic_dist_estimator(feature_num=feature_num, cfg=cfg)
if cfg.SOLVER.MULTI_LEVEL:
out_estimator = semantic_dist_estimator(feature_num=cfg.MODEL.NUM_CLASSES, cfg=cfg)
iteration = 0
start_training_time = time.time()
end = time.time()
save_to_disk = local_rank == 0
max_iters = cfg.SOLVER.MAX_ITER
meters = MetricLogger(delimiter=" ")
logger.info(">>>>>>>>>>>>>>>> Start Training >>>>>>>>>>>>>>>>")
feature_extractor.train()
classifier.train()
for i, ((src_input, src_label, src_name), (tgt_input, _, _)) in enumerate(zip(src_train_loader, tgt_train_loader)):
data_time = time.time() - end
current_lr = adjust_learning_rate(cfg.SOLVER.LR_METHOD, cfg.SOLVER.BASE_LR, iteration, max_iters,
power=cfg.SOLVER.LR_POWER)
for index in range(len(optimizer_fea.param_groups)):
optimizer_fea.param_groups[index]['lr'] = current_lr
for index in range(len(optimizer_cls.param_groups)):
optimizer_cls.param_groups[index]['lr'] = current_lr * 10
optimizer_fea.zero_grad()
optimizer_cls.zero_grad()
src_input = src_input.cuda(non_blocking=True)
src_label = src_label.cuda(non_blocking=True).long()
tgt_input = tgt_input.cuda(non_blocking=True)
src_size = src_input.shape[-2:]
src_feat = feature_extractor(src_input)
src_out = classifier(src_feat)
tgt_feat = feature_extractor(tgt_input)
tgt_out = classifier(tgt_feat)
tgt_out_softmax = F.softmax(tgt_out, dim=1)
# supervision loss
src_pred = F.interpolate(src_out, size=src_size, mode='bilinear', align_corners=True)
if cfg.SOLVER.LAMBDA_LOV > 0:
src_pred_softmax = F.softmax(src_pred, dim=1)
loss_lov = lovasz_softmax(src_pred_softmax, src_label, ignore=255)
loss_sup = ce_criterion(src_pred, src_label) + cfg.SOLVER.LAMBDA_LOV * loss_lov
meters.update(loss_lov=loss_lov.item())
else:
loss_sup = ce_criterion(src_pred, src_label)
meters.update(loss_sup=loss_sup.item())
# source mask: downsample the ground-truth label
B, A, Hs, Ws = src_feat.size()
src_mask = F.interpolate(src_label.unsqueeze(0).float(), size=(Hs, Ws), mode='nearest').squeeze(0).long()
src_mask = src_mask.contiguous().view(B * Hs * Ws, )
assert not src_mask.requires_grad
# target mask: constant threshold
_, _, Ht, Wt = tgt_feat.size()
tgt_out_maxvalue, tgt_mask = torch.max(tgt_out_softmax, dim=1)
for i in range(cfg.MODEL.NUM_CLASSES):
tgt_mask[(tgt_out_maxvalue < cfg.SOLVER.DELTA) * (tgt_mask == i)] = 255
tgt_mask = tgt_mask.contiguous().view(B * Ht * Wt, )
assert not tgt_mask.requires_grad
src_feat = src_feat.permute(0, 2, 3, 1).contiguous().view(B * Hs * Ws, A)
tgt_feat = tgt_feat.permute(0, 2, 3, 1).contiguous().view(B * Ht * Wt, A)
# update feature-level statistics
feat_estimator.update(features=src_feat.detach(), labels=src_mask)
# contrastive loss on both domains
loss_feat = pcl_criterion(Mean=feat_estimator.Mean.detach(),
CoVariance=feat_estimator.CoVariance.detach(),
feat=src_feat,
labels=src_mask) \
+ pcl_criterion(Mean=feat_estimator.Mean.detach(),
CoVariance=feat_estimator.CoVariance.detach(),
feat=tgt_feat,
labels=tgt_mask)
meters.update(loss_feat=loss_feat.item())
if cfg.SOLVER.MULTI_LEVEL:
src_out = src_out.permute(0, 2, 3, 1).contiguous().view(B * Hs * Ws, cfg.MODEL.NUM_CLASSES)
tgt_out = tgt_out.permute(0, 2, 3, 1).contiguous().view(B * Ht * Wt, cfg.MODEL.NUM_CLASSES)
# update output-level statistics
out_estimator.update(features=src_out.detach(), labels=src_mask)
# the proposed contrastive loss on prediction map
loss_out = pcl_criterion(Mean=out_estimator.Mean.detach(),
CoVariance=out_estimator.CoVariance.detach(),
feat=src_out,
labels=src_mask) \
+ pcl_criterion(Mean=out_estimator.Mean.detach(),
CoVariance=out_estimator.CoVariance.detach(),
feat=tgt_out,
labels=tgt_mask)
meters.update(loss_out=loss_out.item())
loss = loss_sup \
+ cfg.SOLVER.LAMBDA_FEAT * loss_feat \
+ cfg.SOLVER.LAMBDA_OUT * loss_out
else:
loss = loss_sup + cfg.SOLVER.LAMBDA_FEAT * loss_feat
loss.backward()
optimizer_fea.step()
optimizer_cls.step()
batch_time = time.time() - end
end = time.time()
meters.update(time=batch_time, data=data_time)
eta_seconds = meters.time.global_avg * (cfg.SOLVER.STOP_ITER - iteration)
eta_string = str(datetime.timedelta(seconds=int(eta_seconds)))
iteration += 1
if iteration % 20 == 0 or iteration == max_iters:
logger.info(
meters.delimiter.join(
[
"eta: {eta}",
"iter: {iter}",
"{meters}",
"lr: {lr:.6f}",
"max mem: {memory:.02f} GB"
]
).format(
eta=eta_string,
iter=iteration,
meters=str(meters),
lr=optimizer_fea.param_groups[0]["lr"],
memory=torch.cuda.max_memory_allocated() / 1024.0 / 1024.0 / 1024.0
)
)
if (iteration == cfg.SOLVER.MAX_ITER or iteration % cfg.SOLVER.CHECKPOINT_PERIOD == 0) and save_to_disk:
filename = os.path.join(cfg.OUTPUT_DIR, "model_iter{:06d}.pth".format(iteration))
torch.save({'iteration': iteration,
'feature_extractor': feature_extractor.state_dict(),
'classifier': classifier.state_dict(),
'optimizer_fea': optimizer_fea.state_dict(),
'optimizer_cls': optimizer_cls.state_dict(),
}, filename)
if iteration == cfg.SOLVER.MAX_ITER:
break
if iteration == cfg.SOLVER.STOP_ITER:
break
total_training_time = time.time() - start_training_time
total_time_str = str(datetime.timedelta(seconds=total_training_time))
logger.info(
"Total training time: {} ({:.4f} s / it)".format(
total_time_str, total_training_time / cfg.SOLVER.STOP_ITER
)
)
return feature_extractor, classifier
def test(cfg, output_dir='', output_dir_merge='', output_dir_save=''):
logger = logging.getLogger('shaper.test')
# build model
model, loss_fn, _, val_metric = build_model(cfg)
model = nn.DataParallel(model).cuda()
model_merge = nn.DataParallel(PointNetCls(in_channels=3,
out_channels=128)).cuda()
# build checkpointer
checkpointer = Checkpointer(model, save_dir=output_dir, logger=logger)
checkpointer_merge = Checkpointer(model_merge,
save_dir=output_dir_merge,
logger=logger)
if cfg.TEST.WEIGHT:
# load weight if specified
weight_path = cfg.TEST.WEIGHT.replace('@', output_dir)
checkpointer.load(weight_path, resume=False)
else:
# load last checkpoint
checkpointer.load(None, resume=True)
checkpointer_merge.load(None, resume=True)
#checkpointer_refine.load(None, resume=True)
# build data loader
test_dataloader = build_dataloader(cfg, mode='test')
test_dataset = test_dataloader.dataset
assert cfg.TEST.BATCH_SIZE == 1, '{} != 1'.format(cfg.TEST.BATCH_SIZE)
save_fig_dir = osp.join(output_dir_save, 'test_fig')
os.makedirs(save_fig_dir, exist_ok=True)
save_fig_dir_size = osp.join(save_fig_dir, 'size')
os.makedirs(save_fig_dir_size, exist_ok=True)
save_fig_dir_gt = osp.join(save_fig_dir, 'gt')
os.makedirs(save_fig_dir_gt, exist_ok=True)
# ---------------------------------------------------------------------------- #
# Test
# ---------------------------------------------------------------------------- #
model.eval()
model_merge.eval()
loss_fn.eval()
softmax = nn.Softmax()
set_random_seed(cfg.RNG_SEED)
NUM_POINT = 10000
n_shape = len(test_dataloader)
NUM_INS = 200
out_mask = np.zeros((n_shape, NUM_INS, NUM_POINT), dtype=np.bool)
out_valid = np.zeros((n_shape, NUM_INS), dtype=np.bool)
out_conf = np.ones((n_shape, NUM_INS), dtype=np.float32)
meters = MetricLogger(delimiter=' ')
meters.bind(val_metric)
tot_purity_error_list = list()
tot_purity_error_small_list = list()
tot_purity_error_large_list = list()
tot_pred_acc = list()
tot_pred_small_acc = list()
tot_pred_large_acc = list()
tot_mean_rela_size_list = list()
tot_mean_policy_label0 = list()
tot_mean_label_policy0 = list()
tot_mean_policy_label0_large = list()
tot_mean_policy_label0_small = list()
tot_mean_label_policy0_large = list()
tot_mean_label_policy0_small = list()
with torch.no_grad():
start_time = time.time()
end = start_time
for iteration, data_batch in enumerate(test_dataloader):
print(iteration)
data_time = time.time() - end
iter_start_time = time.time()
data_batch = {
k: v.cuda(non_blocking=True)
for k, v in data_batch.items()
}
preds = model(data_batch)
loss_dict = loss_fn(preds, data_batch)
meters.update(**loss_dict)
val_metric.update_dict(preds, data_batch)
#extraction box features
batch_size, _, num_centroids, num_neighbours = data_batch[
'neighbour_xyz'].shape
num_points = data_batch['points'].shape[-1]
#batch_size, num_centroid, num_neighbor
_, p = torch.max(preds['ins_logit'], 1)
box_index_expand = torch.zeros(
(batch_size * num_centroids, num_points)).cuda()
box_index_expand = box_index_expand.scatter_(
dim=1,
index=data_batch['neighbour_index'].reshape(
[-1, num_neighbours]),
src=p.reshape([-1, num_neighbours]).float())
#centroid_label = data_batch['centroid_label'].reshape(-1)
minimum_box_pc_num = 16
minimum_overlap_pc_num = 16 #1/16 * num_neighbour
gtmin_mask = (torch.sum(box_index_expand, dim=-1) >
minimum_box_pc_num)
#remove purity < 0.8
box_label_expand = torch.zeros(
(batch_size * num_centroids, 200)).cuda()
purity_pred = torch.zeros([0]).type(torch.LongTensor).cuda()
purity_pred_float = torch.zeros([0]).type(torch.FloatTensor).cuda()
for i in range(batch_size):
cur_xyz_pool, xyz_mean = mask_to_xyz(
data_batch['points'][i],
box_index_expand.view(batch_size, num_centroids,
num_points)[i],
sample_num=512)
cur_xyz_pool -= xyz_mean
cur_xyz_pool /= (cur_xyz_pool + 1e-6).norm(dim=1).max(
dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
logits_purity = model_merge(cur_xyz_pool, 'purity')
p = (logits_purity > 0.8).long().squeeze()
purity_pred = torch.cat([purity_pred, p])
purity_pred_float = torch.cat(
[purity_pred_float,
logits_purity.squeeze()])
p_thresh = 0.8
purity_pred = purity_pred_float > p_thresh
#in case remove too much
while (torch.sum(purity_pred) < 48):
p_thresh = p_thresh - 0.01
purity_pred = purity_pred_float > p_thresh
valid_mask = gtmin_mask.long() * purity_pred.long()
box_index_expand = torch.index_select(
box_index_expand, dim=0, index=valid_mask.nonzero().squeeze())
box_num = torch.sum(valid_mask.reshape(batch_size, num_centroids),
1)
cumsum_box_num = torch.cumsum(box_num, dim=0)
cumsum_box_num = torch.cat([
torch.from_numpy(np.array(0)).cuda().unsqueeze(0),
cumsum_box_num
],
dim=0)
with torch.no_grad():
pc_all = data_batch['points']
xyz_pool1 = torch.zeros([0, 3, 1024]).float().cuda()
xyz_pool2 = torch.zeros([0, 3, 1024]).float().cuda()
label_pool = torch.zeros([0]).float().cuda()
for i in range(pc_all.shape[0]):
bs = 1
pc = pc_all[i].clone()
cur_mask_pool = box_index_expand[
cumsum_box_num[i]:cumsum_box_num[i + 1]].clone()
cover_ratio = torch.unique(
cur_mask_pool.nonzero()[:, 1]).shape[0] / num_points
#print(iteration, cover_ratio)
cur_xyz_pool, xyz_mean = mask_to_xyz(pc, cur_mask_pool)
subpart_pool = cur_xyz_pool.clone()
subpart_mask_pool = cur_mask_pool.clone()
init_pool_size = cur_xyz_pool.shape[0]
meters.update(cover_ratio=cover_ratio,
init_pool_size=init_pool_size)
negative_num = 0
positive_num = 0
#remove I
inter_matrix = torch.matmul(cur_mask_pool,
cur_mask_pool.transpose(0, 1))
inter_matrix_full = inter_matrix.clone(
) > minimum_overlap_pc_num
inter_matrix[torch.eye(inter_matrix.shape[0]).byte()] = 0
pair_idx = (inter_matrix.triu() >
minimum_overlap_pc_num).nonzero()
zero_pair = torch.ones([0, 2]).long()
purity_matrix = torch.zeros(inter_matrix.shape).cuda()
policy_matrix = torch.zeros(inter_matrix.shape).cuda()
bsp = 64
idx = torch.arange(pair_idx.shape[0]).cuda()
#calculate initial policy score matrix
purity_pool = torch.zeros([0]).float().cuda()
policy_pool = torch.zeros([0]).float().cuda()
for k in range(int(np.ceil(idx.shape[0] / bsp))):
sub_part_idx = torch.index_select(
pair_idx, dim=0, index=idx[k * bsp:(k + 1) * bsp])
part_xyz1 = torch.index_select(cur_xyz_pool,
dim=0,
index=sub_part_idx[:,
0])
part_xyz2 = torch.index_select(cur_xyz_pool,
dim=0,
index=sub_part_idx[:,
1])
part_xyz = torch.cat([part_xyz1, part_xyz2], -1)
part_xyz -= torch.mean(part_xyz, -1).unsqueeze(-1)
part_norm = part_xyz.norm(dim=1).max(
dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
part_xyz /= part_norm
logits_purity = model_merge(part_xyz,
'purity').squeeze()
if len(logits_purity.shape) == 0:
logits_purity = logits_purity.unsqueeze(0)
purity_pool = torch.cat([purity_pool, logits_purity],
dim=0)
part_xyz11 = part_xyz1 - torch.mean(part_xyz1,
-1).unsqueeze(-1)
part_xyz22 = part_xyz2 - torch.mean(part_xyz2,
-1).unsqueeze(-1)
part_xyz11 /= part_norm
part_xyz22 /= part_norm
logits11 = model_merge(part_xyz11, 'policy')
logits22 = model_merge(part_xyz22, 'policy')
policy_scores = model_merge(
torch.cat([logits11, logits22], dim=-1),
'policy_head').squeeze()
if len(policy_scores.shape) == 0:
policy_scores = policy_scores.unsqueeze(0)
policy_pool = torch.cat([policy_pool, policy_scores],
dim=0)
purity_matrix[pair_idx[:, 0], pair_idx[:, 1]] = purity_pool
policy_matrix[pair_idx[:, 0], pair_idx[:, 1]] = policy_pool
score_matrix = torch.zeros(purity_matrix.shape).cuda()
score_matrix[pair_idx[:, 0], pair_idx[:, 1]] = softmax(
purity_pool * policy_pool)
meters.update(initial_pair_num=pair_idx.shape[0])
iteration_num = 0
remote_flag = False
#info
policy_list = []
purity_list = []
gt_purity_list = []
gt_label_list = []
pred_label_list = []
size_list = []
relative_size_list = []
while (pair_idx.shape[0] > 0) or (remote_flag == False):
if pair_idx.shape[0] == 0:
remote_flag = True
inter_matrix = 20 * torch.ones([
cur_mask_pool.shape[0], cur_mask_pool.shape[0]
]).cuda()
inter_matrix[zero_pair[:, 0], zero_pair[:, 1]] = 0
inter_matrix[torch.eye(
inter_matrix.shape[0]).byte()] = 0
pair_idx = (inter_matrix.triu() >
minimum_overlap_pc_num).nonzero()
if pair_idx.shape[0] == 0:
break
purity_matrix = torch.zeros(
inter_matrix.shape).cuda()
policy_matrix = torch.zeros(
inter_matrix.shape).cuda()
bsp = 64
idx = torch.arange(pair_idx.shape[0]).cuda()
purity_pool = torch.zeros([0]).float().cuda()
policy_pool = torch.zeros([0]).float().cuda()
for k in range(int(np.ceil(idx.shape[0] / bsp))):
sub_part_idx = torch.index_select(
pair_idx,
dim=0,
index=idx[k * bsp:(k + 1) * bsp])
part_xyz1 = torch.index_select(
cur_xyz_pool,
dim=0,
index=sub_part_idx[:, 0])
part_xyz2 = torch.index_select(
cur_xyz_pool,
dim=0,
index=sub_part_idx[:, 1])
part_xyz = torch.cat([part_xyz1, part_xyz2],
-1)
part_xyz -= torch.mean(part_xyz,
-1).unsqueeze(-1)
part_norm = part_xyz.norm(dim=1).max(
dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
part_xyz /= part_norm
logits_purity = model_merge(
part_xyz, 'purity').squeeze()
if len(logits_purity.shape) == 0:
logits_purity = logits_purity.unsqueeze(0)
purity_pool = torch.cat(
[purity_pool, logits_purity], dim=0)
part_xyz11 = part_xyz1 - torch.mean(
part_xyz1, -1).unsqueeze(-1)
part_xyz22 = part_xyz2 - torch.mean(
part_xyz2, -1).unsqueeze(-1)
part_xyz11 /= part_norm
part_xyz22 /= part_norm
logits11 = model_merge(part_xyz11, 'policy')
logits22 = model_merge(part_xyz22, 'policy')
policy_scores = model_merge(
torch.cat([logits11, logits22], dim=-1),
'policy_head').squeeze()
if len(policy_scores.shape) == 0:
policy_scores = policy_scores.unsqueeze(0)
policy_pool = torch.cat(
[policy_pool, policy_scores], dim=0)
purity_matrix[pair_idx[:, 0],
pair_idx[:, 1]] = purity_pool
policy_matrix[pair_idx[:, 0],
pair_idx[:, 1]] = policy_pool
score_matrix = torch.zeros(
purity_matrix.shape).cuda()
score_matrix[pair_idx[:, 0],
pair_idx[:, 1]] = softmax(
purity_pool * policy_pool)
iteration_num += 1
#everytime select the pair with highest score
score_arr = score_matrix[pair_idx[:, 0], pair_idx[:,
1]]
highest_score, rank_idx = torch.topk(score_arr,
1,
largest=True,
sorted=False)
perm_idx = rank_idx
assert highest_score == score_matrix[pair_idx[rank_idx,
0],
pair_idx[rank_idx,
1]]
sub_part_idx = torch.index_select(pair_idx,
dim=0,
index=perm_idx[:bs])
purity_score = purity_matrix[sub_part_idx[:, 0],
sub_part_idx[:, 1]]
policy_score = policy_matrix[sub_part_idx[:, 0],
sub_part_idx[:, 1]]
#info
policy_list.append(policy_score.cpu().data.numpy()[0])
purity_list.append(purity_score.cpu().data.numpy()[0])
part_xyz1 = torch.index_select(cur_xyz_pool,
dim=0,
index=sub_part_idx[:,
0])
part_xyz2 = torch.index_select(cur_xyz_pool,
dim=0,
index=sub_part_idx[:,
1])
part_xyz = torch.cat([part_xyz1, part_xyz2], -1)
part_xyz -= torch.mean(part_xyz, -1).unsqueeze(-1)
part_xyz1 -= torch.mean(part_xyz1, -1).unsqueeze(-1)
part_xyz2 -= torch.mean(part_xyz2, -1).unsqueeze(-1)
part_xyz1 /= part_xyz1.norm(dim=1).max(
dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
part_xyz2 /= part_xyz2.norm(dim=1).max(
dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
part_xyz /= part_xyz.norm(dim=1).max(
dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
part_mask11 = torch.index_select(cur_mask_pool,
dim=0,
index=sub_part_idx[:,
0])
part_mask22 = torch.index_select(cur_mask_pool,
dim=0,
index=sub_part_idx[:,
1])
context_idx1 = torch.index_select(
inter_matrix_full, dim=0, index=sub_part_idx[:, 0])
context_idx2 = torch.index_select(
inter_matrix_full, dim=0, index=sub_part_idx[:, 1])
context_mask1 = (torch.matmul(
context_idx1.float(), cur_mask_pool) > 0).float()
context_mask2 = (torch.matmul(
context_idx2.float(), cur_mask_pool) > 0).float()
context_mask = ((context_mask1 + context_mask2) >
0).float()
context_xyz, xyz_mean = mask_to_xyz(pc,
context_mask,
sample_num=2048)
context_xyz = context_xyz - xyz_mean
context_xyz /= context_xyz.norm(dim=1).max(
dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
if cfg.DATASET.PartNetInsSeg.TEST.shape not in [
'Chair', 'Lamp', 'StorageFurniture'
]:
logits1 = model_merge(part_xyz1, 'backbone')
logits2 = model_merge(part_xyz2, 'backbone')
merge_logits = model_merge(
torch.cat([
part_xyz,
torch.cat([
logits1.unsqueeze(-1).expand(
-1, -1, part_xyz1.shape[-1]),
logits2.unsqueeze(-1).expand(
-1, -1, part_xyz2.shape[-1])
],
dim=-1)
],
dim=1), 'head')
else:
if (cur_xyz_pool.shape[0] >= 32):
logits1 = model_merge(part_xyz1, 'backbone')
logits2 = model_merge(part_xyz2, 'backbone')
merge_logits = model_merge(
torch.cat([
part_xyz,
torch.cat([
logits1.unsqueeze(-1).expand(
-1, -1, part_xyz1.shape[-1]),
logits2.unsqueeze(-1).expand(
-1, -1, part_xyz2.shape[-1])
],
dim=-1)
],
dim=1), 'head')
else:
logits1 = model_merge(part_xyz1, 'backbone')
logits2 = model_merge(part_xyz2, 'backbone')
context_logits = model_merge(
context_xyz, 'backbone2')
merge_logits = model_merge(
torch.cat([
part_xyz,
torch.cat([
logits1.unsqueeze(-1).expand(
-1, -1, part_xyz1.shape[-1]),
logits2.unsqueeze(-1).expand(
-1, -1, part_xyz2.shape[-1])
],
dim=-1),
torch.cat([
context_logits.unsqueeze(-1).
expand(-1, -1, part_xyz.shape[-1])
],
dim=-1)
],
dim=1), 'head2')
_, p = torch.max(merge_logits, 1)
if not remote_flag:
siamese_label = p * (
(purity_score > p_thresh).long())
else:
siamese_label = p
siamese_label = p * ((purity_score > p_thresh).long())
negative_num += torch.sum(siamese_label == 0)
positive_num += torch.sum(siamese_label == 1)
pred_label_list.append(
siamese_label.cpu().data.numpy())
#info
new_part_mask = 1 - (1 - part_mask11) * (1 -
part_mask22)
size_list.append(
torch.sum(new_part_mask).cpu().data.numpy())
size1 = torch.sum(part_mask11).cpu().data.numpy()
size2 = torch.sum(part_mask22).cpu().data.numpy()
relative_size_list.append(size1 / size2 +
size2 / size1)
#update info
merge_idx1 = torch.index_select(
sub_part_idx[:, 0],
dim=0,
index=siamese_label.nonzero().squeeze())
merge_idx2 = torch.index_select(
sub_part_idx[:, 1],
dim=0,
index=siamese_label.nonzero().squeeze())
merge_idx = torch.unique(
torch.cat([merge_idx1, merge_idx2], dim=0))
nonmerge_idx1 = torch.index_select(
sub_part_idx[:, 0],
dim=0,
index=(1 - siamese_label).nonzero().squeeze())
nonmerge_idx2 = torch.index_select(
sub_part_idx[:, 1],
dim=0,
index=(1 - siamese_label).nonzero().squeeze())
part_mask1 = torch.index_select(cur_mask_pool,
dim=0,
index=merge_idx1)
part_mask2 = torch.index_select(cur_mask_pool,
dim=0,
index=merge_idx2)
new_part_mask = 1 - (1 - part_mask1) * (1 - part_mask2)
equal_matrix = torch.matmul(
new_part_mask,
1 - new_part_mask.transpose(0, 1)) + torch.matmul(
1 - new_part_mask, new_part_mask.transpose(
0, 1))
equal_matrix[torch.eye(
equal_matrix.shape[0]).byte()] = 1
fid = (equal_matrix == 0).nonzero()
if fid.shape[0] > 0:
flag = torch.ones(merge_idx1.shape[0])
for k in range(flag.shape[0]):
if flag[k] != 0:
flag[fid[:, 1][fid[:, 0] == k]] = 0
new_part_mask = torch.index_select(
new_part_mask,
dim=0,
index=flag.nonzero().squeeze().cuda())
new_part_xyz, xyz_mean = mask_to_xyz(pc, new_part_mask)
#update purity and score, policy score matrix
if new_part_mask.shape[0] > 0:
overlap_idx = (
torch.matmul(cur_mask_pool,
new_part_mask.transpose(0, 1)) >
minimum_overlap_pc_num).nonzero().squeeze()
if overlap_idx.shape[0] > 0:
if len(overlap_idx.shape) == 1:
overlap_idx = overlap_idx.unsqueeze(0)
part_xyz1 = torch.index_select(
cur_xyz_pool,
dim=0,
index=overlap_idx[:, 0])
part_xyz2 = tile(new_part_xyz, 0,
overlap_idx.shape[0])
part_xyz = torch.cat([part_xyz1, part_xyz2],
-1)
part_xyz -= torch.mean(part_xyz,
-1).unsqueeze(-1)
part_norm = part_xyz.norm(dim=1).max(
dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
part_xyz /= part_norm
overlap_purity_scores = model_merge(
part_xyz, 'purity').squeeze()
part_xyz11 = part_xyz1 - torch.mean(
part_xyz1, -1).unsqueeze(-1)
part_xyz22 = part_xyz2 - torch.mean(
part_xyz2, -1).unsqueeze(-1)
part_xyz11 /= part_norm
part_xyz22 /= part_norm
logits11 = model_merge(part_xyz11, 'policy')
logits22 = model_merge(part_xyz22, 'policy')
overlap_policy_scores = model_merge(
torch.cat([logits11, logits22], dim=-1),
'policy_head').squeeze()
tmp_purity_arr = torch.zeros(
[purity_matrix.shape[0]]).cuda()
tmp_policy_arr = torch.zeros(
[policy_matrix.shape[0]]).cuda()
tmp_purity_arr[
overlap_idx[:, 0]] = overlap_purity_scores
tmp_policy_arr[
overlap_idx[:, 0]] = overlap_policy_scores
purity_matrix = torch.cat([
purity_matrix,
tmp_purity_arr.unsqueeze(1)
],
dim=1)
policy_matrix = torch.cat([
policy_matrix,
tmp_policy_arr.unsqueeze(1)
],
dim=1)
purity_matrix = torch.cat([
purity_matrix,
torch.zeros(purity_matrix.shape[1]).cuda().
unsqueeze(0)
])
policy_matrix = torch.cat([
policy_matrix,
torch.zeros(policy_matrix.shape[1]).cuda().
unsqueeze(0)
])
else:
purity_matrix = torch.cat([
purity_matrix,
torch.zeros(purity_matrix.shape[0]).cuda().
unsqueeze(1)
],
dim=1)
policy_matrix = torch.cat([
policy_matrix,
torch.zeros(policy_matrix.shape[0]).cuda().
unsqueeze(1)
],
dim=1)
purity_matrix = torch.cat([
purity_matrix,
torch.zeros(purity_matrix.shape[1]).cuda().
unsqueeze(0)
])
policy_matrix = torch.cat([
policy_matrix,
torch.zeros(policy_matrix.shape[1]).cuda().
unsqueeze(0)
])
cur_mask_pool = torch.cat(
[cur_mask_pool, new_part_mask], dim=0)
subpart_mask_pool = torch.cat(
[subpart_mask_pool, new_part_mask], dim=0)
cur_xyz_pool = torch.cat([cur_xyz_pool, new_part_xyz],
dim=0)
subpart_pool = torch.cat([subpart_pool, new_part_xyz],
dim=0)
cur_pool_size = cur_mask_pool.shape[0]
new_mask = torch.ones([cur_pool_size])
new_mask[merge_idx] = 0
new_idx = new_mask.nonzero().squeeze().cuda()
cur_xyz_pool = torch.index_select(cur_xyz_pool,
dim=0,
index=new_idx)
cur_mask_pool = torch.index_select(cur_mask_pool,
dim=0,
index=new_idx)
inter_matrix = torch.matmul(
cur_mask_pool, cur_mask_pool.transpose(0, 1))
inter_matrix_full = inter_matrix.clone(
) > minimum_overlap_pc_num
if remote_flag:
inter_matrix = 20 * torch.ones([
cur_mask_pool.shape[0], cur_mask_pool.shape[0]
]).cuda()
#update zero_matrix
zero_matrix = torch.zeros(
[cur_pool_size, cur_pool_size])
zero_matrix[zero_pair[:, 0], zero_pair[:, 1]] = 1
zero_matrix[nonmerge_idx1, nonmerge_idx2] = 1
zero_matrix[nonmerge_idx2, nonmerge_idx1] = 1
zero_matrix = torch.index_select(zero_matrix,
dim=0,
index=new_idx.cpu())
zero_matrix = torch.index_select(zero_matrix,
dim=1,
index=new_idx.cpu())
zero_pair = zero_matrix.nonzero()
inter_matrix[zero_pair[:, 0], zero_pair[:, 1]] = 0
inter_matrix[torch.eye(
inter_matrix.shape[0]).byte()] = 0
pair_idx = (inter_matrix.triu() >
minimum_overlap_pc_num).nonzero()
purity_matrix = torch.index_select(purity_matrix,
dim=0,
index=new_idx)
purity_matrix = torch.index_select(purity_matrix,
dim=1,
index=new_idx)
policy_matrix = torch.index_select(policy_matrix,
dim=0,
index=new_idx)
policy_matrix = torch.index_select(policy_matrix,
dim=1,
index=new_idx)
score_matrix = torch.zeros(purity_matrix.shape).cuda()
score_idx = pair_idx
score_matrix[score_idx[:, 0],
score_idx[:, 1]] = softmax(
purity_matrix[score_idx[:, 0],
score_idx[:, 1]] *
policy_matrix[score_idx[:, 0],
score_idx[:, 1]])
final_pool_size = subpart_pool.shape[0]
meters.update(final_pool_size=final_pool_size,
negative_num=negative_num,
positive_num=positive_num)
meters.update(iteration_num=iteration_num)
meters.update(iteration_time=time.time() - iter_start_time)
t1 = torch.matmul(cur_mask_pool, 1 - cur_mask_pool.transpose(0, 1))
t1[torch.eye(t1.shape[0]).byte()] = 1
t1_id = (t1 == 0).nonzero()
final_idx = torch.ones(t1.shape[0])
final_idx[t1_id[:, 0]] = 0
cur_mask_pool = torch.index_select(
cur_mask_pool,
dim=0,
index=final_idx.nonzero().squeeze().cuda())
pred_ins_label = torch.zeros(num_points).cuda()
for k in range(cur_mask_pool.shape[0]):
pred_ins_label[cur_mask_pool[k].byte()] = k + 1
valid_idx = torch.sum(cur_mask_pool, 0) > 0
if torch.sum(1 - valid_idx) != 0:
valid_points = pc[:, valid_idx]
invalid_points = pc[:, 1 - valid_idx]
#perform knn to cover all points
knn_index, _ = _F.knn_distance(invalid_points.unsqueeze(0),
valid_points.unsqueeze(0), 5,
False)
invalid_pred, _ = pred_ins_label[valid_idx][
knn_index.squeeze()].mode()
pred_ins_label[1 - valid_idx] = invalid_pred
cur_mask_pool_new = torch.zeros([0, num_points]).cuda()
for k in range(cur_mask_pool.shape[0]):
if torch.sum(pred_ins_label == (k + 1)) != 0:
cur_mask_pool_new = torch.cat([
cur_mask_pool_new,
((pred_ins_label == (k + 1)).float()).unsqueeze(0)
],
dim=0)
out_mask[iteration, :cur_mask_pool_new.shape[0]] = copy.deepcopy(
cur_mask_pool_new.cpu().data.numpy().astype(np.bool))
out_valid[iteration, :cur_mask_pool_new.shape[0]] = np.sum(
cur_mask_pool_new.cpu().data.numpy()) > 10
test_time = time.time() - start_time
logger.info('Test {} test time: {:.2f}s'.format(meters.summary_str,
test_time))
for i in range(int(out_mask.shape[0] / 1024) + 1):
save_h5(os.path.join(output_dir_save, 'test-%02d.h5' % (i)),
out_mask[i * 1024:(i + 1) * 1024],
out_valid[i * 1024:(i + 1) * 1024],
out_conf[i * 1024:(i + 1) * 1024])
def train_one_epoch(model,
model_merge,
loss_fn,
metric,
dataloader,
cur_epoch,
optimizer,
optimizer_embed,
checkpointer_embed,
output_dir_merge,
max_grad_norm=0.0,
freezer=None,
log_period=-1):
global xyz_pool1
global xyz_pool2
global context_xyz_pool1
global context_xyz_pool2
global context_context_xyz_pool
global context_label_pool
global context_purity_pool
global label_pool
global purity_purity_pool
global purity_xyz_pool
global policy_purity_pool
global policy_reward_pool
global policy_xyz_pool1
global policy_xyz_pool2
global old_iteration
logger = logging.getLogger('shaper.train')
meters = MetricLogger(delimiter=' ')
metric.reset()
meters.bind(metric)
model.eval()
loss_fn.eval()
model_merge.eval()
softmax = nn.Softmax()
policy_total_bs = 8
rnum = 1 if policy_total_bs-cur_epoch < 1 else policy_total_bs-cur_epoch
end = time.time()
buffer_txt = os.path.join(output_dir_merge, 'last_buffer')
checkpoint_txt = os.path.join(output_dir_merge, 'last_checkpoint')
if os.path.exists(checkpoint_txt):
checkpoint_f = open(checkpoint_txt,'r')
cur_checkpoint = checkpoint_f.read()
checkpoint_f.close()
else:
cur_checkpoint = 'no_checkpoint'
checkpointer_embed.load(None, resume=True)
print('load checkpoint from %s'%cur_checkpoint)
model_merge.eval()
for iteration, data_batch in enumerate(dataloader):
print('epoch: %d, iteration: %d, size of binary: %d, size of context: %d'%(cur_epoch, iteration, len(xyz_pool1), len(context_xyz_pool1)))
sys.stdout.flush()
#add conditions
if os.path.exists(checkpoint_txt):
checkpoint_f = open(checkpoint_txt,'r')
new_checkpoint = checkpoint_f.read()
checkpoint_f.close()
if cur_checkpoint != new_checkpoint:
checkpointer_embed.load(None, resume=True)
cur_checkpoint = new_checkpoint
print('load checkpoint from %s'%cur_checkpoint)
model_merge.eval()
data_time = time.time() - end
data_batch = {k: v.cuda(non_blocking=True) for k, v in data_batch.items()}
#predict box's coords
with torch.no_grad():
preds = model(data_batch)
loss_dict = loss_fn(preds, data_batch)
total_loss = sum(loss_dict.values())
meters.update(loss=total_loss, **loss_dict)
with torch.no_grad():
# TODO add loss_dict hack
metric.update_dict(preds, data_batch)
#extraction box features
batch_size, _, num_centroids, num_neighbours = data_batch['neighbour_xyz'].shape
num_points = data_batch['points'].shape[-1]
#batch_size, num_centroid, num_neighbor
_, p = torch.max(preds['ins_logit'], 1)
box_index_expand = torch.zeros((batch_size*num_centroids, num_points)).cuda()
box_index_expand = box_index_expand.scatter_(dim=1, index=data_batch['neighbour_index'].reshape([-1, num_neighbours]), src=p.reshape([-1, num_neighbours]).float())
centroid_label = data_batch['centroid_label'].reshape(-1)
#remove proposal < minimum_num
minimum_box_pc_num = 8
minimum_overlap_pc_num = 8 #1/32 * num_neighbour
gtmin_mask = (torch.sum(box_index_expand, dim=-1) > minimum_box_pc_num)
#remove proposal whose purity score < 0.8
box_label_expand = torch.zeros((batch_size*num_centroids, 200)).cuda()
box_idx_expand = tile(data_batch['ins_id'],0,num_centroids).cuda()
box_label_expand = box_label_expand.scatter_add_(dim=1, index=box_idx_expand, src=box_index_expand).float()
maximum_label_num, maximum_label = torch.max(box_label_expand, 1)
centroid_label = maximum_label
total_num = torch.sum(box_label_expand, 1)
box_purity = maximum_label_num / (total_num+1e-6)
box_purity_mask = box_purity > 0.8
box_purity_valid_mask = 1 - (box_purity < 0.8)*(box_purity > 0.6)
box_purity_valid_mask *= gtmin_mask
box_purity_valid_mask_l2 = gtmin_mask.long()#*data_batch['centroid_valid_mask'].reshape(-1).long()
meters.update(purity_ratio = torch.sum(box_purity_mask).float()/box_purity_mask.shape[0], purity_valid_ratio=torch.sum(box_purity_valid_mask).float()/box_purity_mask.shape[0])
meters.update(purity_pos_num = torch.sum(box_purity_mask), purity_neg_num = torch.sum(1-box_purity_mask), purity_neg_valid_num=torch.sum(box_purity<0.6))
centroid_valid_mask = data_batch['centroid_valid_mask'].reshape(-1).long()
meters.update(centroid_valid_purity_ratio = torch.sum(torch.index_select(box_purity_mask, dim=0, index=centroid_valid_mask.nonzero().squeeze())).float()/torch.sum(centroid_valid_mask),centroid_nonvalid_purity_ratio = torch.sum(torch.index_select(box_purity_mask, dim=0, index=(1-centroid_valid_mask).nonzero().squeeze())).float()/torch.sum(1-centroid_valid_mask))
purity_pred = torch.zeros([0]).type(torch.FloatTensor).cuda()
#update pool by valid_mask
valid_mask = gtmin_mask.long() * box_purity_mask.long() * (centroid_label!=0).long()
centroid_label = torch.index_select(centroid_label, dim=0, index=valid_mask.nonzero().squeeze())
box_num = torch.sum(valid_mask.reshape(batch_size, num_centroids),1)
cumsum_box_num = torch.cumsum(box_num, dim=0)
cumsum_box_num = torch.cat([torch.from_numpy(np.array(0)).cuda().unsqueeze(0),cumsum_box_num],dim=0)
#initialization
pc_all = data_batch['points']
centroid_label_all = centroid_label.clone()
sub_xyz_pool1 = torch.zeros([0,3,1024]).float().cuda()
sub_xyz_pool2 = torch.zeros([0,3,1024]).float().cuda()
sub_context_xyz_pool1 = torch.zeros([0,3,1024]).float().cuda()
sub_context_xyz_pool2 = torch.zeros([0,3,1024]).float().cuda()
sub_context_context_xyz_pool = torch.zeros([0,3,2048]).float().cuda()
sub_context_label_pool = torch.zeros([0]).float().cuda()
sub_context_purity_pool = torch.zeros([0]).float().cuda()
sub_label_pool = torch.zeros([0]).float().cuda()
sub_purity_pool = torch.zeros([0]).float().cuda()
sub_purity_xyz_pool = torch.zeros([0,3,1024]).float().cuda()
sub_policy_purity_pool = torch.zeros([0,policy_update_bs]).float().cuda()
sub_policy_reward_pool = torch.zeros([0,policy_update_bs]).float().cuda()
sub_policy_xyz_pool1 = torch.zeros([0,policy_update_bs,3,1024]).float().cuda()
sub_policy_xyz_pool2 = torch.zeros([0,policy_update_bs,3,1024]).float().cuda()
for i in range(pc_all.shape[0]):
bs = policy_total_bs
BS = policy_update_bs
pc = pc_all[i].clone()
cur_mask_pool = box_index_expand[cumsum_box_num[i]:cumsum_box_num[i+1]].clone()
centroid_label = centroid_label_all[cumsum_box_num[i]:cumsum_box_num[i+1]].clone()
cover_ratio = torch.unique(cur_mask_pool.nonzero()[:,1]).shape[0]/num_points
cur_xyz_pool, xyz_mean = mask_to_xyz(pc, cur_mask_pool)
init_pool_size = cur_xyz_pool.shape[0]
meters.update(cover_ratio=cover_ratio, init_pool_size=init_pool_size)
negative_num = 0
positive_num = 0
#intial adjacent matrix
inter_matrix = torch.matmul(cur_mask_pool, cur_mask_pool.transpose(0, 1))
inter_matrix_full = inter_matrix.clone()>minimum_overlap_pc_num
inter_matrix[torch.eye(inter_matrix.shape[0]).byte()] = 0
pair_idx = (inter_matrix.triu()>minimum_overlap_pc_num).nonzero()
zero_pair = torch.ones([0,2]).long()
small_flag = False
model_merge.eval()
with torch.no_grad():
while pair_idx.shape[0] > 0:
#when there are too few pairs, we calculate the policy score matrix on all pairs
if pair_idx.shape[0] <= BS and small_flag == False:
small_flag = True
purity_matrix = torch.zeros(inter_matrix.shape).cuda()
policy_matrix = torch.zeros(inter_matrix.shape).cuda()
bsp = 64
idx = torch.arange(pair_idx.shape[0]).cuda()
purity_pool = torch.zeros([0]).float().cuda()
policy_pool = torch.zeros([0]).float().cuda()
for k in range(int(np.ceil(idx.shape[0]/bsp))):
sub_part_idx = torch.index_select(pair_idx, dim=0, index=idx[k*bsp:(k+1)*bsp])
part_xyz1 = torch.index_select(cur_xyz_pool, dim=0, index=sub_part_idx[:,0])
part_xyz2 = torch.index_select(cur_xyz_pool, dim=0, index=sub_part_idx[:,1])
part_xyz = torch.cat([part_xyz1,part_xyz2],-1)
part_xyz -= torch.mean(part_xyz,-1).unsqueeze(-1)
part_norm = part_xyz.norm(dim=1).max(dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
part_xyz /= part_norm
logits_purity = model_merge(part_xyz, 'purity').squeeze()
if len(logits_purity.shape) == 0:
logits_purity = logits_purity.unsqueeze(0)
purity_pool = torch.cat([purity_pool, logits_purity], dim=0)
part_xyz11 = part_xyz1 - torch.mean(part_xyz1,-1).unsqueeze(-1)
part_xyz22 = part_xyz2 - torch.mean(part_xyz2,-1).unsqueeze(-1)
part_xyz11 /= part_norm
part_xyz22 /= part_norm
logits11 = model_merge(part_xyz11, 'policy')
logits22 = model_merge(part_xyz22, 'policy')
policy_scores = model_merge(torch.cat([logits11, logits22],dim=-1), 'policy_head').squeeze()
if len(policy_scores.shape) == 0:
policy_scores = policy_scores.unsqueeze(0)
policy_pool = torch.cat([policy_pool, policy_scores], dim=0)
purity_matrix[pair_idx[:,0],pair_idx[:,1]] = purity_pool
policy_matrix[pair_idx[:,0],pair_idx[:,1]] = policy_pool
score_matrix = torch.zeros(purity_matrix.shape).cuda()
score_matrix[pair_idx[:,0],pair_idx[:,1]] = softmax(purity_pool*policy_pool)
#if there are many pairs, we randomly sample a small batch of pairs and then compute the policy score matrix thereon to select pairs into the next stage
#else, we select a pair with highest policy score
if pair_idx.shape[0] > BS and small_flag != True:
perm_idx = torch.randperm(pair_idx.shape[0]).cuda()
perm_idx_rnd = perm_idx[:bs]
sub_part_idx = torch.index_select(pair_idx, dim=0, index=perm_idx[:int(BS)])
part_xyz1 = torch.index_select(cur_xyz_pool, dim=0, index=sub_part_idx[:,0])
part_xyz2 = torch.index_select(cur_xyz_pool, dim=0, index=sub_part_idx[:,1])
part_xyz = torch.cat([part_xyz1,part_xyz2],-1)
part_xyz -= torch.mean(part_xyz,-1).unsqueeze(-1)
part_norm = part_xyz.norm(dim=1).max(dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
part_xyz /= part_norm
logits_purity = model_merge(part_xyz, 'purity').squeeze()
sub_policy_purity_pool = torch.cat([sub_policy_purity_pool, logits_purity.detach().unsqueeze(0).clone()],dim=0)
part_xyz11 = part_xyz1 - torch.mean(part_xyz1,-1).unsqueeze(-1)
part_xyz22 = part_xyz2 - torch.mean(part_xyz2,-1).unsqueeze(-1)
part_xyz11 /= part_norm
part_xyz22 /= part_norm
logits11 = model_merge(part_xyz11, 'policy')
logits22 = model_merge(part_xyz22, 'policy')
policy_scores = model_merge(torch.cat([logits11, logits22],dim=-1), 'policy_head').squeeze()
sub_policy_xyz_pool1 = torch.cat([sub_policy_xyz_pool1, part_xyz11.unsqueeze(0).clone()], dim=0)
sub_policy_xyz_pool2 = torch.cat([sub_policy_xyz_pool2, part_xyz22.unsqueeze(0).clone()], dim=0)
if sub_policy_xyz_pool1.shape[0] > 64:
policy_xyz_pool1 = torch.cat([policy_xyz_pool1, sub_policy_xyz_pool1.cpu().clone()], dim=0)
policy_xyz_pool2 = torch.cat([policy_xyz_pool2, sub_policy_xyz_pool2.cpu().clone()], dim=0)
sub_policy_xyz_pool1 = torch.zeros([0,policy_update_bs,3,1024]).float().cuda()
sub_policy_xyz_pool2 = torch.zeros([0,policy_update_bs,3,1024]).float().cuda()
score = softmax(logits_purity*policy_scores)
part_label1 = torch.index_select(centroid_label, dim=0, index=sub_part_idx[:,0])
part_label2 = torch.index_select(centroid_label, dim=0, index=sub_part_idx[:,1])
siamese_label_gt = (part_label1 == part_label2)*(1 - (part_label1 == -1))*(1 - (part_label2 == -1))*(logits_purity>0.8)
sub_policy_reward_pool = torch.cat([sub_policy_reward_pool, siamese_label_gt.unsqueeze(0).float().clone()], dim=0)
loss_policy = -torch.sum(score*(siamese_label_gt.float()))
meters.update(loss_policy =loss_policy)
#we also introduce certain random samples to encourage exploration
_, rank_idx = torch.topk(score,bs,largest=True,sorted=False)
perm_idx = perm_idx[rank_idx]
perm_idx = torch.cat([perm_idx[:policy_total_bs-rnum], perm_idx_rnd[:rnum]], dim=0)
if cur_epoch == 1 and iteration < 128:
perm_idx = torch.randperm(pair_idx.shape[0]).cuda()
perm_idx = perm_idx[:policy_total_bs]
else:
score = score_matrix[pair_idx[:,0],pair_idx[:,1]]
_, rank_idx = torch.topk(score,1,largest=True,sorted=False)
perm_idx = rank_idx
if len(perm_idx.shape) == 0:
perm_idx = perm_idx.unsqueeze(0)
if cur_epoch == 1 and iteration < 128:
perm_idx = torch.randperm(pair_idx.shape[0]).cuda()
perm_idx = perm_idx[:1]
#send the selected pairs into verification network
sub_part_idx = torch.index_select(pair_idx, dim=0, index=perm_idx[:bs])
part_xyz1 = torch.index_select(cur_xyz_pool, dim=0, index=sub_part_idx[:,0])
part_xyz2 = torch.index_select(cur_xyz_pool, dim=0, index=sub_part_idx[:,1])
part_mask11 = torch.index_select(cur_mask_pool, dim=0, index=sub_part_idx[:,0])
part_mask22 = torch.index_select(cur_mask_pool, dim=0, index=sub_part_idx[:,1])
part_label1 = torch.index_select(centroid_label, dim=0, index=sub_part_idx[:,0])
part_label2 = torch.index_select(centroid_label, dim=0, index=sub_part_idx[:,1])
new_part_mask = 1-(1-part_mask11)*(1-part_mask22)
box_label_expand = torch.zeros((new_part_mask.shape[0], 200)).cuda()
box_idx_expand = tile(data_batch['ins_id'][i].unsqueeze(0),0,new_part_mask.shape[0]).cuda()
box_label_expand = box_label_expand.scatter_add_(dim=1, index=box_idx_expand, src=new_part_mask).float()
maximum_label_num, maximum_label = torch.max(box_label_expand, 1)
total_num = torch.sum(box_label_expand, 1)
box_purity = maximum_label_num / (total_num+1e-6)
sub_purity_pool = torch.cat([sub_purity_pool, box_purity.clone()], dim=0)
purity_xyz, xyz_mean = mask_to_xyz(pc, new_part_mask)
purity_xyz -= xyz_mean
purity_xyz /=(purity_xyz+1e-6).norm(dim=1).max(dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
sub_purity_xyz_pool = torch.cat([sub_purity_xyz_pool, purity_xyz.clone()],dim=0)
siamese_label_gt = (part_label1 == part_label2)*(1 - (part_label1 == -1))*(1 - (part_label2 == -1))*(box_purity > 0.8)
negative_num += torch.sum(siamese_label_gt == 0)
positive_num += torch.sum(siamese_label_gt == 1)
#save data
sub_xyz_pool1 = torch.cat([sub_xyz_pool1, part_xyz1.clone()], dim=0)
sub_xyz_pool2 = torch.cat([sub_xyz_pool2, part_xyz2.clone()], dim=0)
sub_label_pool = torch.cat([sub_label_pool, siamese_label_gt.clone().float()], dim=0)
#renorm
part_xyz = torch.cat([part_xyz1,part_xyz2],-1)
part_xyz -= torch.mean(part_xyz,-1).unsqueeze(-1)
part_xyz11 = part_xyz1 - torch.mean(part_xyz1,-1).unsqueeze(-1)
part_xyz22 = part_xyz2 - torch.mean(part_xyz2,-1).unsqueeze(-1)
part_xyz11 /=part_xyz11.norm(dim=1).max(dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
part_xyz22 /=part_xyz22.norm(dim=1).max(dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
part_xyz /=part_xyz.norm(dim=1).max(dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
#save data
if cur_xyz_pool.shape[0] <= 32:
context_idx1 = torch.index_select(inter_matrix_full,dim=0,index=sub_part_idx[:,0])
context_idx2 = torch.index_select(inter_matrix_full,dim=0,index=sub_part_idx[:,1])
context_mask1 = (torch.matmul(context_idx1.float(), cur_mask_pool)>0).float()
context_mask2 = (torch.matmul(context_idx2.float(), cur_mask_pool)>0).float()
context_mask = ((context_mask1+context_mask2)>0).float()
context_xyz, xyz_mean = mask_to_xyz(pc, context_mask, sample_num=2048)
context_xyz = context_xyz - xyz_mean
context_xyz /= context_xyz.norm(dim=1).max(dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
sub_context_context_xyz_pool = torch.cat([sub_context_context_xyz_pool, context_xyz.clone()], dim=0)
sub_context_xyz_pool1 = torch.cat([sub_context_xyz_pool1, part_xyz1.clone()], dim=0)
sub_context_xyz_pool2 = torch.cat([sub_context_xyz_pool2, part_xyz2.clone()], dim=0)
sub_context_label_pool = torch.cat([sub_context_label_pool, siamese_label_gt.clone().float()], dim=0)
sub_context_purity_pool = torch.cat([sub_context_purity_pool, box_purity.clone()], dim=0)
#at the very beginning, we group pairs according to ground-truth
if (cur_epoch == 1 and iteration < 128) or (cur_checkpoint == 'no_checkpoint'):
siamese_label = (part_label1 == part_label2)
#if we have many sub-parts in the pool, we use the binary branch to predict
elif cur_xyz_pool.shape[0] > 32:
logits1 = model_merge(part_xyz11,'backbone')
logits2 = model_merge(part_xyz22,'backbone')
merge_logits = model_merge(torch.cat([part_xyz, torch.cat([logits1.unsqueeze(-1).expand(-1,-1,part_xyz1.shape[-1]), logits2.unsqueeze(-1).expand(-1,-1,part_xyz2.shape[-1])], dim=-1)], dim=1), 'head')
_, p = torch.max(merge_logits, 1)
siamese_label = p
#if there are too few sub-parts in the pool, we use the context branch to predict
else:
logits1 = model_merge(part_xyz11,'backbone')
logits2 = model_merge(part_xyz22,'backbone')
context_logits = model_merge(context_xyz,'backbone2')
merge_logits = model_merge(torch.cat([part_xyz, torch.cat([logits1.unsqueeze(-1).expand(-1,-1,part_xyz1.shape[-1]), logits2.unsqueeze(-1).expand(-1,-1,part_xyz2.shape[-1])], dim=-1), torch.cat([context_logits.unsqueeze(-1).expand(-1,-1,part_xyz.shape[-1])], dim=-1)], dim=1), 'head2')
_, p = torch.max(merge_logits, 1)
siamese_label = p
#group sub-parts according to the prediction
merge_idx1 = torch.index_select(sub_part_idx[:,0], dim=0, index=siamese_label.nonzero().squeeze())
merge_idx2 = torch.index_select(sub_part_idx[:,1], dim=0, index=siamese_label.nonzero().squeeze())
merge_idx = torch.unique(torch.cat([merge_idx1, merge_idx2], dim=0))
nonmerge_idx1 = torch.index_select(sub_part_idx[:,0], dim=0, index=(1-siamese_label).nonzero().squeeze())
nonmerge_idx2 = torch.index_select(sub_part_idx[:,1], dim=0, index=(1-siamese_label).nonzero().squeeze())
part_mask1 = torch.index_select(cur_mask_pool, dim=0, index=merge_idx1)
part_mask2 = torch.index_select(cur_mask_pool, dim=0, index=merge_idx2)
new_part_mask = 1-(1-part_mask1)*(1-part_mask2)
new_part_label = torch.index_select(part_label1, dim=0, index=siamese_label.nonzero().squeeze()).long()
new_part_label_invalid = torch.index_select(siamese_label_gt, dim=0, index=siamese_label.nonzero().squeeze()).long()
new_part_label = new_part_label*new_part_label_invalid + -1*(1-new_part_label_invalid)
#sometimes, we may obtain several identical sub-parts
#for those, we only keep one
equal_matrix = torch.matmul(new_part_mask,1-new_part_mask.transpose(0,1))+torch.matmul(1-new_part_mask,new_part_mask.transpose(0,1))
equal_matrix[torch.eye(equal_matrix.shape[0]).byte()]=1
fid = (equal_matrix==0).nonzero()
if fid.shape[0] > 0:
flag = torch.ones(equal_matrix.shape[0])
for k in range(flag.shape[0]):
if flag[k] != 0:
flag[fid[:,1][fid[:,0]==k]] = 0
new_part_mask = torch.index_select(new_part_mask, dim=0, index=flag.nonzero().squeeze().cuda())
new_part_label = torch.index_select(new_part_label, dim=0, index=flag.nonzero().squeeze().cuda())
new_part_xyz, xyz_mean = mask_to_xyz(pc, new_part_mask)
#when there are too few pairs, update the policy score matrix so that we do not need to calculate the whole matrix everytime
if small_flag and (new_part_mask.shape[0] > 0):
overlap_idx = (torch.matmul(cur_mask_pool, new_part_mask.transpose(0,1))>minimum_overlap_pc_num).nonzero().squeeze()
if overlap_idx.shape[0] > 0:
if len(overlap_idx.shape) == 1:
overlap_idx = overlap_idx.unsqueeze(0)
part_xyz1 = torch.index_select(cur_xyz_pool, dim=0, index=overlap_idx[:,0])
part_xyz2 = tile(new_part_xyz, 0, overlap_idx.shape[0])
part_xyz = torch.cat([part_xyz1,part_xyz2],-1)
part_xyz -= torch.mean(part_xyz,-1).unsqueeze(-1)
part_norm = part_xyz.norm(dim=1).max(dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
part_xyz /= part_norm
overlap_purity_scores = model_merge(part_xyz, 'purity').squeeze()
part_xyz11 = part_xyz1 - torch.mean(part_xyz1,-1).unsqueeze(-1)
part_xyz22 = part_xyz2 - torch.mean(part_xyz2,-1).unsqueeze(-1)
part_xyz11 /= part_norm
part_xyz22 /= part_norm
logits11 = model_merge(part_xyz11, 'policy')
logits22 = model_merge(part_xyz22, 'policy')
overlap_policy_scores = model_merge(torch.cat([logits11, logits22],dim=-1), 'policy_head').squeeze()
tmp_purity_arr = torch.zeros([purity_matrix.shape[0]]).cuda()
tmp_policy_arr = torch.zeros([policy_matrix.shape[0]]).cuda()
tmp_purity_arr[overlap_idx[:,0]] = overlap_purity_scores
tmp_policy_arr[overlap_idx[:,0]] = overlap_policy_scores
purity_matrix = torch.cat([purity_matrix,tmp_purity_arr.unsqueeze(1)],dim=1)
policy_matrix = torch.cat([policy_matrix,tmp_policy_arr.unsqueeze(1)],dim=1)
purity_matrix = torch.cat([purity_matrix,torch.zeros(purity_matrix.shape[1]).cuda().unsqueeze(0)])
policy_matrix = torch.cat([policy_matrix,torch.zeros(policy_matrix.shape[1]).cuda().unsqueeze(0)])
else:
purity_matrix = torch.cat([purity_matrix,torch.zeros(purity_matrix.shape[0]).cuda().unsqueeze(1)],dim=1)
policy_matrix = torch.cat([policy_matrix,torch.zeros(policy_matrix.shape[0]).cuda().unsqueeze(1)],dim=1)
purity_matrix = torch.cat([purity_matrix,torch.zeros(purity_matrix.shape[1]).cuda().unsqueeze(0)])
policy_matrix = torch.cat([policy_matrix,torch.zeros(policy_matrix.shape[1]).cuda().unsqueeze(0)])
#update cur_pool, add new parts, pick out merged input pairs
cur_mask_pool = torch.cat([cur_mask_pool, new_part_mask], dim=0)
cur_xyz_pool = torch.cat([cur_xyz_pool, new_part_xyz], dim=0)
centroid_label = torch.cat([centroid_label, new_part_label], dim=0)
cur_pool_size = cur_mask_pool.shape[0]
new_mask = torch.ones([cur_pool_size])
new_mask[merge_idx] = 0
new_idx = new_mask.nonzero().squeeze().cuda()
cur_xyz_pool = torch.index_select(cur_xyz_pool, dim=0, index=new_idx)
cur_mask_pool = torch.index_select(cur_mask_pool, dim=0, index=new_idx)
centroid_label = torch.index_select(centroid_label, dim=0, index=new_idx)
inter_matrix = torch.matmul(cur_mask_pool, cur_mask_pool.transpose(0, 1))
inter_matrix_full = inter_matrix.clone()>minimum_overlap_pc_num
#update zero_matrix
zero_matrix = torch.zeros([cur_pool_size, cur_pool_size])
zero_matrix[zero_pair[:,0], zero_pair[:,1]] = 1
zero_matrix[nonmerge_idx1, nonmerge_idx2] = 1
zero_matrix[nonmerge_idx2, nonmerge_idx1] = 1
zero_matrix = torch.index_select(zero_matrix, dim=0, index=new_idx.cpu())
zero_matrix = torch.index_select(zero_matrix, dim=1, index=new_idx.cpu())
zero_pair = zero_matrix.nonzero()
inter_matrix[zero_pair[:,0], zero_pair[:,1]] = 0
inter_matrix[torch.eye(inter_matrix.shape[0]).byte()] = 0
pair_idx = (inter_matrix.triu()>minimum_overlap_pc_num).nonzero()
if small_flag == True:
purity_matrix = torch.index_select(purity_matrix, dim=0, index=new_idx)
purity_matrix = torch.index_select(purity_matrix, dim=1, index=new_idx)
policy_matrix = torch.index_select(policy_matrix, dim=0, index=new_idx)
policy_matrix = torch.index_select(policy_matrix, dim=1, index=new_idx)
score_matrix = torch.zeros(purity_matrix.shape).cuda()
score_idx = pair_idx
score_matrix[score_idx[:,0], score_idx[:,1]] = softmax(purity_matrix[score_idx[:,0], score_idx[:,1]] * policy_matrix[score_idx[:,0], score_idx[:,1]])
final_pool_size = negative_num + positive_num
meters.update(final_pool_size=final_pool_size,negative_num=negative_num, positive_num=positive_num)
xyz_pool1 = torch.cat([xyz_pool1, sub_xyz_pool1.cpu().clone()],dim=0)
xyz_pool2 = torch.cat([xyz_pool2, sub_xyz_pool2.cpu().clone()],dim=0)
label_pool = torch.cat([label_pool, sub_label_pool.cpu().clone()], dim=0)
context_context_xyz_pool = torch.cat([context_context_xyz_pool, sub_context_context_xyz_pool.cpu().clone()],dim=0)
context_xyz_pool1 = torch.cat([context_xyz_pool1, sub_context_xyz_pool1.cpu().clone()],dim=0)
context_xyz_pool2 = torch.cat([context_xyz_pool2, sub_context_xyz_pool2.cpu().clone()],dim=0)
context_label_pool = torch.cat([context_label_pool, sub_context_label_pool.cpu().clone()], dim=0)
context_purity_pool = torch.cat([context_purity_pool, sub_context_purity_pool.cpu().clone()], dim=0)
purity_purity_pool = torch.cat([purity_purity_pool, sub_purity_pool.cpu().clone()], dim=0)
purity_xyz_pool = torch.cat([purity_xyz_pool, sub_purity_xyz_pool.cpu().clone()], dim=0)
policy_purity_pool = torch.cat([policy_purity_pool, sub_policy_purity_pool.cpu().clone()], dim=0)
policy_reward_pool = torch.cat([policy_reward_pool, sub_policy_reward_pool.cpu().clone()], dim=0)
policy_xyz_pool1 = torch.cat([policy_xyz_pool1, sub_policy_xyz_pool1.cpu().clone()], dim=0)
policy_xyz_pool2 = torch.cat([policy_xyz_pool2, sub_policy_xyz_pool2.cpu().clone()], dim=0)
produce_time = time.time() - end
#condition
if context_xyz_pool1.shape[0] > 10000:
rbuffer = dict()
rbuffer['xyz_pool1'] = xyz_pool1
rbuffer['xyz_pool2'] = xyz_pool2
rbuffer['context_xyz_pool1'] = context_xyz_pool1
rbuffer['context_xyz_pool2'] = context_xyz_pool2
rbuffer['context_context_xyz_pool'] = context_context_xyz_pool
rbuffer['context_label_pool'] = context_label_pool
rbuffer['context_purity_pool'] = context_purity_pool
rbuffer['label_pool'] = label_pool
rbuffer['purity_purity_pool'] = purity_purity_pool
rbuffer['purity_xyz_pool'] = purity_xyz_pool
rbuffer['policy_purity_pool'] = policy_purity_pool
rbuffer['policy_reward_pool'] = policy_reward_pool
rbuffer['policy_xyz_pool1'] = policy_xyz_pool1
rbuffer['policy_xyz_pool2'] = policy_xyz_pool2
torch.save(rbuffer, os.path.join(output_dir_merge, 'buffer', '%d_%d.pt'%(cur_epoch, iteration)))
buffer_f = open(buffer_txt, 'w')
buffer_f.write('%d_%d'%(cur_epoch, iteration))
buffer_f.close()
p = Popen('rm -rf %s'%(os.path.join(output_dir_merge, 'buffer', '%d_%d.pt'%(cur_epoch, old_iteration))), shell=True)
old_iteration = iteration
p = Popen('rm -rf %s_*'%(os.path.join(output_dir_merge, 'buffer', '%d'%(cur_epoch-1))), shell=True)
xyz_pool1 = torch.zeros([0,3,1024]).float()
xyz_pool2 = torch.zeros([0,3,1024]).float()
context_xyz_pool1 = torch.zeros([0,3,1024]).float()
context_xyz_pool2 = torch.zeros([0,3,1024]).float()
context_context_xyz_pool = torch.zeros([0,3,2048]).float()
context_label_pool = torch.zeros([0]).float()
context_purity_pool = torch.zeros([0]).float()
label_pool = torch.zeros([0]).float()
purity_purity_pool = torch.zeros([0]).float()
purity_xyz_pool = torch.zeros([0,3,1024]).float()
policy_purity_pool = torch.zeros([0,policy_update_bs]).float()
policy_reward_pool = torch.zeros([0,policy_update_bs]).float()
policy_xyz_pool1 = torch.zeros([0,policy_update_bs,3,1024]).float()
policy_xyz_pool2 = torch.zeros([0,policy_update_bs,3,1024]).float()
batch_time = time.time() - end
end = time.time()
meters.update(data_time=data_time, produce_time=produce_time)
if log_period > 0 and iteration % log_period == 0:
logger.info(
meters.delimiter.join(
[
'iter: {iter:4d}',
'{meters}',
'max mem: {memory:.0f}',
]
).format(
iter=iteration,
meters=str(meters),
memory=torch.cuda.max_memory_allocated() / (1024.0 ** 2),
)
)
return meters
def train(cfg, local_rank, distributed):
logger = logging.getLogger("SelfSupervised.trainer")
logger.info("Start training")
feature_extractor = build_feature_extractor(cfg)
device = torch.device(cfg.MODEL.DEVICE)
feature_extractor.to(device)
classifier = build_classifier(cfg)
classifier.to(device)
if local_rank == 0:
print(feature_extractor)
print(classifier)
batch_size = cfg.SOLVER.BATCH_SIZE
if distributed:
pg1 = torch.distributed.new_group(
range(torch.distributed.get_world_size()))
batch_size = int(cfg.SOLVER.BATCH_SIZE /
torch.distributed.get_world_size())
if not cfg.MODEL.FREEZE_BN:
feature_extractor = torch.nn.SyncBatchNorm.convert_sync_batchnorm(
feature_extractor)
feature_extractor = torch.nn.parallel.DistributedDataParallel(
feature_extractor,
device_ids=[local_rank],
output_device=local_rank,
find_unused_parameters=True,
process_group=pg1)
pg2 = torch.distributed.new_group(
range(torch.distributed.get_world_size()))
classifier = torch.nn.parallel.DistributedDataParallel(
classifier,
device_ids=[local_rank],
output_device=local_rank,
find_unused_parameters=True,
process_group=pg2)
torch.autograd.set_detect_anomaly(True)
torch.distributed.barrier()
optimizer_fea = torch.optim.SGD(feature_extractor.parameters(),
lr=cfg.SOLVER.BASE_LR,
momentum=cfg.SOLVER.MOMENTUM,
weight_decay=cfg.SOLVER.WEIGHT_DECAY)
optimizer_fea.zero_grad()
optimizer_cls = torch.optim.SGD(classifier.parameters(),
lr=cfg.SOLVER.BASE_LR * 10,
momentum=cfg.SOLVER.MOMENTUM,
weight_decay=cfg.SOLVER.WEIGHT_DECAY)
optimizer_cls.zero_grad()
output_dir = cfg.OUTPUT_DIR
save_to_disk = local_rank == 0
iteration = 0
if cfg.resume:
logger.info("Loading checkpoint from {}".format(cfg.resume))
checkpoint = torch.load(cfg.resume, map_location=torch.device('cpu'))
model_weights = checkpoint[
'feature_extractor'] if distributed else strip_prefix_if_present(
checkpoint['feature_extractor'], 'module.')
feature_extractor.load_state_dict(model_weights)
classifier_weights = checkpoint[
'classifier'] if distributed else strip_prefix_if_present(
checkpoint['classifier'], 'module.')
classifier.load_state_dict(classifier_weights)
src_train_data = build_dataset(cfg, mode='train', is_source=True)
if distributed:
train_sampler = torch.utils.data.distributed.DistributedSampler(
src_train_data)
else:
train_sampler = None
train_loader = torch.utils.data.DataLoader(src_train_data,
batch_size=batch_size,
shuffle=(train_sampler is None),
num_workers=4,
pin_memory=True,
sampler=train_sampler,
drop_last=True)
ce_criterion = torch.nn.CrossEntropyLoss(ignore_index=255)
max_iters = cfg.SOLVER.MAX_ITER
logger.info("Start training")
meters = MetricLogger(delimiter=" ")
feature_extractor.train()
classifier.train()
start_training_time = time.time()
end = time.time()
for i, (src_input, src_label, _) in enumerate(train_loader):
data_time = time.time() - end
current_lr = adjust_learning_rate(cfg.SOLVER.LR_METHOD,
cfg.SOLVER.BASE_LR,
iteration,
max_iters,
power=cfg.SOLVER.LR_POWER)
for index in range(len(optimizer_fea.param_groups)):
optimizer_fea.param_groups[index]['lr'] = current_lr
for index in range(len(optimizer_cls.param_groups)):
optimizer_cls.param_groups[index]['lr'] = current_lr * 10
optimizer_fea.zero_grad()
optimizer_cls.zero_grad()
src_input = src_input.cuda(non_blocking=True)
src_label = src_label.cuda(non_blocking=True).long()
size = src_label.shape[-2:]
pred = classifier(feature_extractor(src_input), size)
loss = ce_criterion(pred, src_label)
loss.backward()
optimizer_fea.step()
optimizer_cls.step()
meters.update(loss_seg=loss.item())
iteration += 1
batch_time = time.time() - end
end = time.time()
meters.update(time=batch_time, data=data_time)
eta_seconds = meters.time.global_avg * (cfg.SOLVER.STOP_ITER -
iteration)
eta_string = str(datetime.timedelta(seconds=int(eta_seconds)))
if iteration % 20 == 0 or iteration == max_iters:
logger.info(
meters.delimiter.join([
"eta: {eta}",
"iter: {iter}",
"{meters}",
"lr: {lr:.6f}",
"max mem: {memory:.2f} GB",
]).format(
eta=eta_string,
iter=iteration,
meters=str(meters),
lr=optimizer_fea.param_groups[0]["lr"],
memory=torch.cuda.max_memory_allocated() / 1024.0 /
1024.0 / 1024.0,
))
if (iteration % cfg.SOLVER.CHECKPOINT_PERIOD == 0
or iteration == max_iters) and save_to_disk:
filename = os.path.join(output_dir,
"model_iter{:06d}.pth".format(iteration))
torch.save(
{
'iteration': iteration,
'feature_extractor': feature_extractor.state_dict(),
'classifier': classifier.state_dict(),
'optimizer_fea': optimizer_fea.state_dict(),
'optimizer_cls': optimizer_cls.state_dict()
}, filename)
if iteration == cfg.SOLVER.MAX_ITER:
break
if iteration == cfg.SOLVER.STOP_ITER:
break
total_training_time = time.time() - start_training_time
total_time_str = str(datetime.timedelta(seconds=total_training_time))
logger.info("Total training time: {} ({:.4f} s / it)".format(
total_time_str, total_training_time / cfg.SOLVER.STOP_ITER))
return feature_extractor, classifier
def train_one_epoch(model,
loss_fn,
metric,
dataloader,
optimizer,
max_grad_norm=0.0,
freezer=None,
log_period=-1):
logger = logging.getLogger('shaper.train')
meters = MetricLogger(delimiter=' ')
# reset metrics
metric.reset()
meters.bind(metric)
# set training mode
model.train()
if freezer is not None:
freezer.freeze()
loss_fn.train()
metric.train()
end = time.time()
for iteration, data_batch in enumerate(dataloader):
data_time = time.time() - end
data_batch = {
k: v.cuda(non_blocking=True)
for k, v in data_batch.items()
}
preds = model(data_batch)
# backward
optimizer.zero_grad()
loss_dict = loss_fn(preds, data_batch)
total_loss = sum(loss_dict.values())
# It is slightly faster to update metrics and meters before backward
meters.update(loss=total_loss, **loss_dict)
with torch.no_grad():
metric.update_dict(preds, data_batch)
total_loss.backward()
if max_grad_norm > 0:
# CAUTION: built-in clip_grad_norm_ clips the total norm.
nn.utils.clip_grad_norm_(model.parameters(),
max_norm=max_grad_norm)
optimizer.step()
batch_time = time.time() - end
end = time.time()
meters.update(time=batch_time, data=data_time)
if log_period > 0 and iteration % log_period == 0:
logger.info(
meters.delimiter.join([
'iter: {iter:4d}',
'{meters}',
'lr: {lr:.2e}',
'max mem: {memory:.0f}',
]).format(
iter=iteration,
meters=str(meters),
lr=optimizer.param_groups[0]['lr'],
memory=torch.cuda.max_memory_allocated() / (1024.0**2),
))
return meters
def train_one_epoch(model_merge,
cur_epoch,
optimizer_embed,
output_dir_merge,
max_grad_norm=0.0,
freezer=None,
log_period=-1):
global xyz_pool1
global xyz_pool2
global context_xyz_pool1
global context_xyz_pool2
global context_context_xyz_pool
global context_label_pool
global context_purity_pool
global label_pool
global purity_purity_pool
global purity_xyz_pool
global policy_purity_pool
global policy_reward_pool
global policy_xyz_pool1
global policy_xyz_pool2
global cur_buffer
global rbuffer
global count
logger = logging.getLogger('shaper.train')
meters = MetricLogger(delimiter=' ')
softmax = nn.Softmax()
end = time.time()
model_merge.train()
sys.stdout.flush()
BS = policy_update_bs
print('epoch: %d' % cur_epoch)
#delete older models
if cur_epoch > 2:
if (cur_epoch - 2) % 400 != 0:
p = Popen('rm %s' %
(os.path.join(output_dir_merge, 'model_%03d.pth' %
(cur_epoch - 2))),
shell=True)
#keep reading newest data generated by producer
while True:
buffer_txt = os.path.join(output_dir_merge, 'last_buffer')
buffer_file = open(buffer_txt, 'r')
new_buffer = buffer_file.read()
buffer_file.close()
if new_buffer != 'start':
if cur_buffer != new_buffer:
count = 0
cur_buffer = new_buffer
print('read data from %s' % cur_buffer)
rbuffer = torch.load(
os.path.join(output_dir_merge, 'buffer',
'%s.pt' % cur_buffer))
break
count += 1
if count <= 2:
break
time.sleep(10)
#read data
xyz_pool1 = rbuffer['xyz_pool1']
xyz_pool2 = rbuffer['xyz_pool2']
context_xyz_pool1 = rbuffer['context_xyz_pool1']
context_xyz_pool2 = rbuffer['context_xyz_pool2']
context_context_xyz_pool = rbuffer['context_context_xyz_pool']
context_label_pool = rbuffer['context_label_pool']
context_purity_pool = rbuffer['context_purity_pool']
label_pool = rbuffer['label_pool']
purity_purity_pool = rbuffer['purity_purity_pool']
purity_xyz_pool = rbuffer['purity_xyz_pool']
policy_purity_pool = rbuffer['policy_purity_pool']
policy_reward_pool = rbuffer['policy_reward_pool']
policy_xyz_pool1 = rbuffer['policy_xyz_pool1']
policy_xyz_pool2 = rbuffer['policy_xyz_pool2']
for i in range(20):
bs2 = 64
TRAIN_LEN = 1024
UP_policy = 2048
TRAIN_LEN_policy = 32
bs_policy = int(128 / policy_update_bs)
#train binary branch
cur_len = xyz_pool1.shape[0]
cur_train_len = TRAIN_LEN if cur_len > TRAIN_LEN else cur_len
perm_idx = torch.randperm(cur_len)
logits1_all = torch.zeros([0]).type(torch.LongTensor).cuda()
sub_xyz_pool1 = torch.index_select(xyz_pool1,
dim=0,
index=perm_idx[:cur_train_len])
sub_xyz_pool2 = torch.index_select(xyz_pool2,
dim=0,
index=perm_idx[:cur_train_len])
sub_label_pool = torch.index_select(label_pool,
dim=0,
index=perm_idx[:cur_train_len])
perm_idx = torch.arange(cur_train_len)
for i in range(int(cur_train_len / bs2)):
optimizer_embed.zero_grad()
part_xyz1 = torch.index_select(sub_xyz_pool1,
dim=0,
index=perm_idx[i * bs2:(i + 1) *
bs2]).cuda()
part_xyz2 = torch.index_select(sub_xyz_pool2,
dim=0,
index=perm_idx[i * bs2:(i + 1) *
bs2]).cuda()
siamese_label = torch.index_select(sub_label_pool,
dim=0,
index=perm_idx[i * bs2:(i + 1) *
bs2]).cuda()
part_xyz = torch.cat([part_xyz1, part_xyz2], -1)
part_xyz -= torch.mean(part_xyz, -1).unsqueeze(-1)
part_xyz1 -= torch.mean(part_xyz1, -1).unsqueeze(-1)
part_xyz2 -= torch.mean(part_xyz2, -1).unsqueeze(-1)
part_xyz1 /= part_xyz1.norm(dim=1).max(
dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
part_xyz2 /= part_xyz2.norm(dim=1).max(
dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
part_xyz /= part_xyz.norm(dim=1).max(
dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
logits1 = model_merge(part_xyz1, 'backbone')
logits2 = model_merge(part_xyz2, 'backbone')
merge_logits = model_merge(
torch.cat([
part_xyz,
torch.cat([
logits1.unsqueeze(-1).expand(-1, -1,
part_xyz1.shape[-1]),
logits2.unsqueeze(-1).expand(-1, -1,
part_xyz2.shape[-1])
],
dim=-1)
],
dim=1), 'head')
_, p = torch.max(merge_logits, 1)
logits1_all = torch.cat([logits1_all, p], dim=0)
merge_acc_arr = (p == siamese_label.long()).float()
meters.update(meters_acc=torch.mean(merge_acc_arr))
if torch.sum(siamese_label) != 0:
merge_pos_acc = torch.mean(
torch.index_select(
merge_acc_arr,
dim=0,
index=(siamese_label == 1).nonzero().squeeze()))
meters.update(merge_pos_acc=merge_pos_acc)
if torch.sum(1 - siamese_label) != 0:
merge_neg_acc = torch.mean(
torch.index_select(
merge_acc_arr,
dim=0,
index=(siamese_label == 0).nonzero().squeeze()))
meters.update(merge_neg_acc=merge_neg_acc)
loss_sim = cross_entropy(merge_logits, siamese_label.long())
loss_dict_embed = {
'loss_sim': loss_sim,
}
meters.update(**loss_dict_embed)
total_loss_embed = sum(loss_dict_embed.values())
total_loss_embed.backward()
optimizer_embed.step()
#train context branch
cur_len = context_xyz_pool1.shape[0]
cur_train_len = TRAIN_LEN if cur_len > TRAIN_LEN else cur_len
perm_idx = torch.randperm(cur_len)
logits1_all = torch.zeros([0]).type(torch.LongTensor).cuda()
sub_xyz_pool1 = torch.index_select(context_xyz_pool1,
dim=0,
index=perm_idx[:cur_train_len])
sub_xyz_pool2 = torch.index_select(context_xyz_pool2,
dim=0,
index=perm_idx[:cur_train_len])
sub_label_pool = torch.index_select(context_label_pool,
dim=0,
index=perm_idx[:cur_train_len])
sub_context_context_xyz_pool = torch.index_select(
context_context_xyz_pool, dim=0, index=perm_idx[:cur_train_len])
perm_idx = torch.arange(cur_train_len)
for i in range(int(cur_train_len / bs2)):
optimizer_embed.zero_grad()
part_xyz1 = torch.index_select(sub_xyz_pool1,
dim=0,
index=perm_idx[i * bs2:(i + 1) *
bs2]).cuda()
part_xyz2 = torch.index_select(sub_xyz_pool2,
dim=0,
index=perm_idx[i * bs2:(i + 1) *
bs2]).cuda()
siamese_label = torch.index_select(sub_label_pool,
dim=0,
index=perm_idx[i * bs2:(i + 1) *
bs2]).cuda()
part_xyz = torch.cat([part_xyz1, part_xyz2], -1)
part_xyz -= torch.mean(part_xyz, -1).unsqueeze(-1)
part_xyz1 -= torch.mean(part_xyz1, -1).unsqueeze(-1)
part_xyz2 -= torch.mean(part_xyz2, -1).unsqueeze(-1)
part_xyz1 /= part_xyz1.norm(dim=1).max(
dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
part_xyz2 /= part_xyz2.norm(dim=1).max(
dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
part_xyz /= part_xyz.norm(dim=1).max(
dim=-1)[0].unsqueeze(-1).unsqueeze(-1)
logits1 = model_merge(part_xyz1, 'backbone')
logits2 = model_merge(part_xyz2, 'backbone')
context_xyz = torch.index_select(sub_context_context_xyz_pool,
dim=0,
index=perm_idx[i * bs2:(i + 1) *
bs2]).cuda()
context_logits = model_merge(context_xyz, 'backbone2')
merge_logits = model_merge(
torch.cat([
part_xyz,
torch.cat([
logits1.detach().unsqueeze(-1).expand(
-1, -1, part_xyz1.shape[-1]),
logits2.detach().unsqueeze(-1).expand(
-1, -1, part_xyz2.shape[-1])
],
dim=-1),
torch.cat([
context_logits.unsqueeze(-1).expand(
-1, -1, part_xyz.shape[-1])
],
dim=-1)
],
dim=1), 'head2')
_, p = torch.max(merge_logits, 1)
logits1_all = torch.cat([logits1_all, p], dim=0)
merge_acc_arr = (p == siamese_label.long()).float()
meters.update(meters_acc_context=torch.mean(merge_acc_arr))
if torch.sum(siamese_label) != 0:
merge_pos_acc = torch.mean(
torch.index_select(
merge_acc_arr,
dim=0,
index=(siamese_label == 1).nonzero().squeeze()))
meters.update(merge_pos_acc_context=merge_pos_acc)
if torch.sum(1 - siamese_label) != 0:
merge_neg_acc = torch.mean(
torch.index_select(
merge_acc_arr,
dim=0,
index=(siamese_label == 0).nonzero().squeeze()))
meters.update(merge_neg_acc_context=merge_neg_acc)
loss_sim = cross_entropy(merge_logits, siamese_label.long())
loss_dict_embed = {
'loss_sim_context': loss_sim,
}
meters.update(**loss_dict_embed)
total_loss_embed = sum(loss_dict_embed.values())
total_loss_embed.backward()
optimizer_embed.step()
#train purity network
cur_len = purity_purity_pool.shape[0]
cur_train_len = TRAIN_LEN if cur_len > TRAIN_LEN else cur_len
perm_idx = torch.randperm(cur_len)
sub_purity_pool = torch.index_select(purity_purity_pool,
dim=0,
index=perm_idx[:cur_train_len])
sub_purity_xyz_pool = torch.index_select(
purity_xyz_pool, dim=0, index=perm_idx[:cur_train_len])
perm_idx = torch.arange(cur_train_len)
for i in range(int(cur_train_len / bs2)):
optimizer_embed.zero_grad()
part_xyz = torch.index_select(sub_purity_xyz_pool,
dim=0,
index=perm_idx[i * bs2:(i + 1) *
bs2]).cuda()
logits_purity = model_merge(part_xyz, 'purity')
siamese_label_l2 = torch.index_select(
sub_purity_pool, dim=0,
index=perm_idx[i * bs2:(i + 1) * bs2]).cuda()
loss_purity = l2_loss(logits_purity.squeeze(), siamese_label_l2)
loss_dict_embed = {
'loss_purity2': loss_purity,
}
meters.update(**loss_dict_embed)
total_loss_embed = sum(loss_dict_embed.values())
total_loss_embed.backward()
optimizer_embed.step()
#train policy network
cur_len = policy_xyz_pool1.shape[0]
cur_train_len = TRAIN_LEN_policy if cur_len > TRAIN_LEN_policy else cur_len
perm_idx = torch.randperm(cur_len)
logits1_all = torch.zeros([0]).type(torch.LongTensor).cuda()
sub_xyz_pool1 = torch.index_select(policy_xyz_pool1,
dim=0,
index=perm_idx[:cur_train_len])
sub_xyz_pool2 = torch.index_select(policy_xyz_pool2,
dim=0,
index=perm_idx[:cur_train_len])
sub_purity_pool = torch.index_select(policy_purity_pool,
dim=0,
index=perm_idx[:cur_train_len])
sub_reward_pool = torch.index_select(policy_reward_pool,
dim=0,
index=perm_idx[:cur_train_len])
perm_idx = torch.arange(cur_train_len)
for i in range(int(cur_train_len / bs_policy)):
optimizer_embed.zero_grad()
part_xyz1 = torch.index_select(
sub_xyz_pool1,
dim=0,
index=perm_idx[i * bs_policy:(i + 1) * bs_policy]).cuda()
part_xyz2 = torch.index_select(
sub_xyz_pool2,
dim=0,
index=perm_idx[i * bs_policy:(i + 1) * bs_policy]).cuda()
purity_arr = torch.index_select(
sub_purity_pool,
dim=0,
index=perm_idx[i * bs_policy:(i + 1) * bs_policy]).cuda()
reward_arr = torch.index_select(
sub_reward_pool,
dim=0,
index=perm_idx[i * bs_policy:(i + 1) * bs_policy]).cuda()
logits11 = model_merge(
part_xyz1.reshape([bs_policy * BS, 3, 1024]), 'policy')
logits22 = model_merge(
part_xyz2.reshape([bs_policy * BS, 3, 1024]), 'policy')
policy_arr = model_merge(torch.cat([logits11, logits22], dim=-1),
'policy_head').squeeze()
policy_arr = policy_arr.reshape([bs_policy, BS])
score_arr = softmax(policy_arr * purity_arr)
loss_policy = torch.mean(-torch.sum(score_arr * reward_arr, dim=1))
meters.update(loss_policy=loss_policy)
loss_policy.backward()
optimizer_embed.step()
if max_grad_norm > 0:
nn.utils.clip_grad_norm_(model.parameters(),
max_norm=max_grad_norm)
train_time = time.time() - end
meters.update(train_time=train_time)
logger.info(
meters.delimiter.join([
'{meters}',
'lr_embed: {lr_embed:.4e}',
]).format(
meters=str(meters),
lr_embed=optimizer_embed.param_groups[0]['lr'],
))
meters.update(lr_embed=optimizer_embed.param_groups[0]['lr'])
return meters
def train_one_epoch(model,
loss_fn,
metric,
dataloader,
optimizer,
max_grad_norm=0.0,
freezer=None,
log_period=-1):
logger = logging.getLogger('shaper.train')
meters = MetricLogger(delimiter=' ')
metric.reset()
meters.bind(metric)
model.train()
if freezer is not None:
freezer.freeze()
loss_fn.train()
end = time.time()
for iteration, data_batch in enumerate(dataloader):
data_time = time.time() - end
data_batch = {
k: v.cuda(non_blocking=True)
for k, v in data_batch.items()
}
preds = model(data_batch)
optimizer.zero_grad()
loss_dict = loss_fn(preds, data_batch)
total_loss = sum(loss_dict.values())
meters.update(loss=total_loss, **loss_dict)
meters.update(node_acc=preds['node_acc'],
node_pos_acc=preds['node_pos_acc'],
node_neg_acc=preds['node_neg_acc'],
center_valid_ratio=preds['center_valid_ratio'])
with torch.no_grad():
# TODO add loss_dict hack
metric.update_dict(preds, data_batch)
total_loss.backward()
if max_grad_norm > 0:
nn.utils.clip_grad_norm_(model.parameters(),
max_norm=max_grad_norm)
optimizer.step()
batch_time = time.time() - end
end = time.time()
meters.update(time=batch_time, data=data_time)
if log_period > 0 and iteration % log_period == 0:
logger.info(
meters.delimiter.join([
'iter: {iter:4d}',
'{meters}',
'lr: {lr:.2e}',
'max mem: {memory:.0f}',
]).format(
iter=iteration,
meters=str(meters),
lr=optimizer.param_groups[0]['lr'],
memory=torch.cuda.max_memory_allocated() / (1024.0**2),
))
return meters
def semantic_dist_init(cfg):
logger = logging.getLogger("semantic_dist_init.trainer")
_, backbone_name = cfg.MODEL.NAME.split('_')
feature_num = 2048 if backbone_name.startswith('resnet') else 1024
feat_estimator = semantic_dist_estimator(feature_num=feature_num, cfg=cfg)
out_estimator = semantic_dist_estimator(feature_num=cfg.MODEL.NUM_CLASSES,
cfg=cfg)
feature_extractor = build_feature_extractor(cfg)
device = torch.device(cfg.MODEL.DEVICE)
feature_extractor.to(device)
classifier = build_classifier(cfg)
classifier.to(device)
torch.cuda.empty_cache()
# load checkpoint
if cfg.resume:
logger.info("Loading checkpoint from {}".format(cfg.resume))
checkpoint = torch.load(cfg.resume, map_location=torch.device('cpu'))
feature_extractor_weights = strip_prefix_if_present(
checkpoint['feature_extractor'], 'module.')
feature_extractor.load_state_dict(feature_extractor_weights)
classifier_weights = strip_prefix_if_present(checkpoint['classifier'],
'module.')
classifier.load_state_dict(classifier_weights)
src_train_data = build_dataset(cfg,
mode='train',
is_source=True,
epochwise=True)
src_train_loader = torch.utils.data.DataLoader(
src_train_data,
batch_size=cfg.SOLVER.BATCH_SIZE_VAL,
shuffle=False,
num_workers=4,
pin_memory=True,
drop_last=False)
iteration = 0
feature_extractor.eval()
classifier.eval()
end = time.time()
start_time = time.time()
max_iters = len(src_train_loader)
meters = MetricLogger(delimiter=" ")
logger.info(
">>>>>>>>>>>>>>>> Initialize semantic distributions >>>>>>>>>>>>>>>>")
logger.info(max_iters)
with torch.no_grad():
for i, (src_input, src_label, _) in enumerate(src_train_loader):
data_time = time.time() - end
src_input = src_input.cuda(non_blocking=True)
src_label = src_label.cuda(non_blocking=True).long()
src_feat = feature_extractor(src_input)
src_out = classifier(src_feat)
B, N, Hs, Ws = src_feat.size()
_, C, _, _ = src_out.size()
# source mask: downsample the ground-truth label
src_mask = F.interpolate(src_label.unsqueeze(0).float(),
size=(Hs, Ws),
mode='nearest').squeeze(0).long()
src_mask = src_mask.contiguous().view(B * Hs * Ws, )
# feature level
src_feat = src_feat.permute(0, 2, 3,
1).contiguous().view(B * Hs * Ws, N)
feat_estimator.update(features=src_feat.detach().clone(),
labels=src_mask)
# output level
src_out = src_out.permute(0, 2, 3,
1).contiguous().view(B * Hs * Ws, C)
out_estimator.update(features=src_out.detach().clone(),
labels=src_mask)
batch_time = time.time() - end
end = time.time()
meters.update(time=batch_time, data=data_time)
iteration = iteration + 1
eta_seconds = meters.time.global_avg * (max_iters - iteration)
eta_string = str(datetime.timedelta(seconds=int(eta_seconds)))
if iteration % 20 == 0 or iteration == max_iters:
logger.info(
meters.delimiter.join([
"eta: {eta}", "iter: {iter}", "{meters}",
"max mem: {memory:.02f}"
]).format(eta=eta_string,
iter=iteration,
meters=str(meters),
memory=torch.cuda.max_memory_allocated() /
1024.0 / 1024.0 / 1024.0))
if iteration == max_iters:
feat_estimator.save(name='feat_dist.pth')
out_estimator.save(name='out_dist.pth')
total_time = time.time() - start_time
total_time_str = str(datetime.timedelta(seconds=total_time))
logger.info("Total training time: {} ({:.4f} s / it)".format(
total_time_str, total_time / max_iters))
class Trainer(object):
def __init__(self, args, logger):
self.args = args
self.logger = logger
if get_rank() == 0:
TBWriter.init(
os.path.join(args.project_dir, args.task_dir, "tbevents")
)
self.device = torch.device(args.device)
self.meters = MetricLogger(delimiter=" ")
# image transform
input_transform = transforms.Compose(
[
transforms.ToTensor(),
transforms.Normalize(
[0.485, 0.456, 0.406], [0.229, 0.224, 0.225]
),
]
)
# dataset and dataloader
data_kwargs = {
"transform": input_transform,
"base_size": args.base_size,
"crop_size": args.crop_size,
"root": args.dataroot,
}
train_dataset = get_segmentation_dataset(
args.dataset, split="train", mode="train", **data_kwargs
)
val_dataset = get_segmentation_dataset(
args.dataset, split="val", mode="val", **data_kwargs
)
args.iters_per_epoch = len(train_dataset) // (
args.num_gpus * args.batch_size
)
args.max_iters = args.epochs * args.iters_per_epoch
train_sampler = make_data_sampler(
train_dataset, shuffle=True, distributed=args.distributed
)
train_batch_sampler = make_batch_data_sampler(
train_sampler, args.batch_size, args.max_iters
)
val_sampler = make_data_sampler(val_dataset, False, args.distributed)
val_batch_sampler = make_batch_data_sampler(
val_sampler, args.batch_size
)
self.train_loader = data.DataLoader(
dataset=train_dataset,
batch_sampler=train_batch_sampler,
num_workers=args.workers,
pin_memory=True,
)
self.val_loader = data.DataLoader(
dataset=val_dataset,
batch_sampler=val_batch_sampler,
num_workers=args.workers,
pin_memory=True,
)
# create network
BatchNorm2d = nn.SyncBatchNorm if args.distributed else nn.BatchNorm2d
self.model = get_segmentation_model(
model=args.model,
dataset=args.dataset,
backbone=args.backbone,
aux=args.aux,
jpu=args.jpu,
norm_layer=BatchNorm2d,
).to(self.device)
# resume checkpoint if needed
if args.resume:
if os.path.isfile(args.resume):
name, ext = os.path.splitext(args.resume)
assert (
ext == ".pkl" or ".pth"
), "Sorry only .pth and .pkl files supported."
print("Resuming training, loading {}...".format(args.resume))
self.model.load_state_dict(
torch.load(
args.resume, map_location=lambda storage, loc: storage
)
)
# create criterion
self.criterion = get_segmentation_loss(
args.model,
use_ohem=args.use_ohem,
aux=args.aux,
aux_weight=args.aux_weight,
ignore_index=-1,
).to(self.device)
# optimizer, for model just includes pretrained, head and auxlayer
params_list = list()
if hasattr(self.model, "pretrained"):
params_list.append(
{"params": self.model.pretrained.parameters(), "lr": args.lr}
)
if hasattr(self.model, "exclusive"):
for module in self.model.exclusive:
params_list.append(
{
"params": getattr(self.model, module).parameters(),
"lr": args.lr * args.lr_scale,
}
)
self.optimizer = torch.optim.SGD(
params_list,
lr=args.lr,
momentum=args.momentum,
weight_decay=args.weight_decay,
)
# lr scheduling
self.lr_scheduler = get_lr_scheduler(self.optimizer, args)
if args.distributed:
self.model = nn.parallel.DistributedDataParallel(
self.model,
device_ids=[args.local_rank],
output_device=args.local_rank,
)
# evaluation metrics
self.metric = SegmentationMetric(train_dataset.num_class)
self.best_pred = 0.0
def train(self):
save_to_disk = get_rank() == 0
epochs, max_iters = self.args.epochs, self.args.max_iters
log_per_iters, val_per_iters = (
self.args.log_iter,
self.args.val_epoch * self.args.iters_per_epoch,
)
save_per_iters = self.args.save_epoch * self.args.iters_per_epoch
start_time = time.time()
self.logger.info(
"Start training, Total Epochs: {:d} = Total Iterations {:d}".format(
epochs, max_iters
)
)
self.model.train()
end = time.time()
for iteration, (images, targets, _) in enumerate(self.train_loader):
iteration = iteration + 1
self.lr_scheduler.step()
data_time = time.time() - end
images = images.to(self.device)
targets = targets.to(self.device)
outputs = self.model(images)
loss_dict = self.criterion(outputs, targets)
losses = sum(loss for loss in loss_dict.values())
# reduce losses over all GPUs for logging purposes
loss_dict_reduced = reduce_loss_dict(loss_dict)
losses_reduced = sum(loss for loss in loss_dict_reduced.values())
self.optimizer.zero_grad()
losses.backward()
self.optimizer.step()
batch_time = time.time() - end
end = time.time()
self.meters.update(
data_time=data_time, batch_time=batch_time, loss=losses_reduced
)
eta_seconds = ((time.time() - start_time) / iteration) * (
max_iters - iteration
)
eta_string = str(datetime.timedelta(seconds=int(eta_seconds)))
if iteration % log_per_iters == 0 and save_to_disk:
self.logger.info(
self.meters.delimiter.join(
[
"eta: {eta}",
"iter: {iter}",
"{meters}",
"lr: {lr:.6f}",
"max mem: {memory:.0f}",
]
).format(
eta=eta_string,
iter=iteration,
meters=(self.meters),
lr=self.optimizer.param_groups[0]["lr"],
memory=torch.cuda.max_memory_allocated()
/ 1024.0
/ 1024.0,
)
)
if is_main_process():
# write train loss and lr
TBWriter.write_scalar(
["train/loss", "train/lr", "train/mem"],
[
losses_reduced,
self.optimizer.param_groups[0]["lr"],
torch.cuda.max_memory_allocated() / 1024.0 / 1024.0,
],
iter=iteration,
)
# write time
TBWriter.write_scalars(
["train/time"],
[self.meters.get_metric(["data_time", "batch_time"])],
iter=iteration,
)
if iteration % save_per_iters == 0 and save_to_disk:
save_checkpoint(self.model, self.args, is_best=False)
if not self.args.skip_val and iteration % val_per_iters == 0:
pixAcc, mIoU = self.validation()
reduced_pixAcc = reduce_tensor(pixAcc)
reduced_mIoU = reduce_tensor(mIoU)
new_pred = (reduced_pixAcc + reduced_mIoU) / 2
new_pred = float(new_pred.cpu().numpy())
if new_pred > self.best_pred:
is_best = True
self.best_pred = new_pred
if is_main_process():
TBWriter.write_scalar(
["val/PixelACC", "val/mIoU"],
[
reduced_pixAcc.cpu().numpy(),
reduced_mIoU.cpu().numpy(),
],
iter=iteration,
)
save_checkpoint(self.model, self.args, is_best)
synchronize()
self.model.train()
if is_main_process():
save_checkpoint(self.model, self.args, is_best=False)
total_training_time = time.time() - start_time
total_training_str = str(
datetime.timedelta(seconds=total_training_time)
)
self.logger.info(
"Total training time: {} ({:.4f}s / it)".format(
total_training_str, total_training_time / max_iters
)
)
def validation(self):
# total_inter, total_union, total_correct, total_label = 0, 0, 0, 0
is_best = False
self.metric.reset()
if self.args.distributed:
model = self.model.module
else:
model = self.model
torch.cuda.empty_cache() # TODO check if it helps
model.eval()
for i, (image, target, filename) in enumerate(self.val_loader):
image = image.to(self.device)
target = target.to(self.device)
with torch.no_grad():
outputs = model(image)
self.metric.update(outputs[0], target)
# pixAcc, mIoU = self.metric.get()
# logger.info(
# "Sample: {:d}, Validation pixAcc: {:.3f}, mIoU: {:.3f}".format(
# i + 1, pixAcc, mIoU
# )
# )
pixAcc, mIoU = self.metric.get()
return (
torch.tensor(pixAcc).to(self.device),
torch.tensor(mIoU).to(self.device),
)
def test(cfg, output_dir=''):
logger = logging.getLogger('shaper.test')
# build model
model, loss_fn, metric = build_model(cfg)
model = nn.DataParallel(model).cuda()
# model = model.cuda()
# build checkpointer
checkpointer = Checkpointer(model, save_dir=output_dir, logger=logger)
if cfg.TEST.WEIGHT:
# load weight if specified
weight_path = cfg.TEST.WEIGHT.replace('@', output_dir)
checkpointer.load(weight_path, resume=False)
else:
# load last checkpoint
checkpointer.load(None, resume=True)
# build data loader
test_dataloader = build_dataloader(cfg, mode='test')
test_dataset = test_dataloader.dataset
# ---------------------------------------------------------------------------- #
# Test
# ---------------------------------------------------------------------------- #
model.eval()
loss_fn.eval()
metric.eval()
set_random_seed(cfg.RNG_SEED)
evaluator = Evaluator(test_dataset.class_names)
if cfg.TEST.VOTE.NUM_VOTE > 1:
# remove old transform
test_dataset.transform = None
if cfg.TEST.VOTE.TYPE == 'AUGMENTATION':
tmp_cfg = cfg.clone()
tmp_cfg.defrost()
tmp_cfg.TEST.AUGMENTATION = tmp_cfg.TEST.VOTE.AUGMENTATION
transform = T.Compose([T.ToTensor()] +
parse_augmentations(tmp_cfg, False) +
[T.Transpose()])
transform_list = [transform] * cfg.TEST.VOTE.NUM_VOTE
elif cfg.TEST.VOTE.TYPE == 'MULTI_VIEW':
# build new transform
transform_list = []
for view_ind in range(cfg.TEST.VOTE.NUM_VOTE):
aug_type = T.RotateByAngleWithNormal if cfg.INPUT.USE_NORMAL else T.RotateByAngle
rotate_by_angle = aug_type(
cfg.TEST.VOTE.MULTI_VIEW.AXIS,
2 * np.pi * view_ind / cfg.TEST.VOTE.NUM_VOTE)
t = [T.ToTensor(), rotate_by_angle, T.Transpose()]
if cfg.TEST.VOTE.MULTI_VIEW.SHUFFLE:
# Some non-deterministic algorithms, like PointNet++, benefit from shuffle.
t.insert(-1, T.Shuffle())
transform_list.append(T.Compose(t))
else:
raise NotImplementedError('Unsupported voting method.')
with torch.no_grad():
tmp_dataloader = DataLoader(test_dataset,
num_workers=1,
collate_fn=lambda x: x[0])
start_time = time.time()
end = start_time
for ind, data in enumerate(tmp_dataloader):
data_time = time.time() - end
points = data['points']
# convert points into tensor
points_batch = [t(points.copy()) for t in transform_list]
points_batch = torch.stack(points_batch, dim=0)
points_batch = points_batch.cuda(non_blocking=True)
preds = model({'points': points_batch})
cls_logit_batch = preds['cls_logit'].cpu().numpy(
) # (batch_size, num_classes)
cls_logit_ensemble = np.mean(cls_logit_batch, axis=0)
pred_label = np.argmax(cls_logit_ensemble)
evaluator.update(pred_label, data['cls_label'])
batch_time = time.time() - end
end = time.time()
if cfg.TEST.LOG_PERIOD > 0 and ind % cfg.TEST.LOG_PERIOD == 0:
logger.info('iter: {:4d} time:{:.4f} data:{:.4f}'.format(
ind, batch_time, data_time))
test_time = time.time() - start_time
logger.info('Test total time: {:.2f}s'.format(test_time))
else:
test_meters = MetricLogger(delimiter=' ')
test_meters.bind(metric)
with torch.no_grad():
start_time = time.time()
end = start_time
for iteration, data_batch in enumerate(test_dataloader):
data_time = time.time() - end
cls_label_batch = data_batch['cls_label'].numpy()
data_batch = {
k: v.cuda(non_blocking=True)
for k, v in data_batch.items()
}
preds = model(data_batch)
loss_dict = loss_fn(preds, data_batch)
total_loss = sum(loss_dict.values())
test_meters.update(loss=total_loss, **loss_dict)
metric.update_dict(preds, data_batch)
cls_logit_batch = preds['cls_logit'].cpu().numpy(
) # (batch_size, num_classes)
pred_label_batch = np.argmax(cls_logit_batch, axis=1)
evaluator.batch_update(pred_label_batch, cls_label_batch)
batch_time = time.time() - end
end = time.time()
test_meters.update(time=batch_time, data=data_time)
if cfg.TEST.LOG_PERIOD > 0 and iteration % cfg.TEST.LOG_PERIOD == 0:
logger.info(
test_meters.delimiter.join([
'iter: {iter:4d}',
'{meters}',
]).format(
iter=iteration,
meters=str(test_meters),
))
test_time = time.time() - start_time
logger.info('Test {} total time: {:.2f}s'.format(
test_meters.summary_str, test_time))
# evaluate
logger.info('overall accuracy={:.2f}%'.format(100.0 *
evaluator.overall_accuracy))
logger.info('average class accuracy={:.2f}%.\n{}'.format(
100.0 * np.nanmean(evaluator.class_accuracy), evaluator.print_table()))
evaluator.save_table(osp.join(output_dir, 'eval.cls.tsv'))
def train(cfg, local_rank, distributed):
logger = logging.getLogger("FADA.trainer")
logger.info("Start training")
feature_extractor = build_feature_extractor(cfg, adv=True)
device = torch.device(cfg.MODEL.DEVICE)
feature_extractor.to(device)
classifier = build_classifier(cfg)
classifier.to(device)
model_D = build_adversarial_discriminator(cfg)
model_D.to(device)
if local_rank == 0:
print(feature_extractor)
print(model_D)
batch_size = cfg.SOLVER.BATCH_SIZE // 2
if distributed:
pg1 = torch.distributed.new_group(
range(torch.distributed.get_world_size()))
batch_size = int(
cfg.SOLVER.BATCH_SIZE / torch.distributed.get_world_size()) // 2
if not cfg.MODEL.FREEZE_BN:
feature_extractor = torch.nn.SyncBatchNorm.convert_sync_batchnorm(
feature_extractor)
feature_extractor = torch.nn.parallel.DistributedDataParallel(
feature_extractor,
device_ids=[local_rank],
output_device=local_rank,
find_unused_parameters=True,
process_group=pg1)
pg2 = torch.distributed.new_group(
range(torch.distributed.get_world_size()))
classifier = torch.nn.parallel.DistributedDataParallel(
classifier,
device_ids=[local_rank],
output_device=local_rank,
find_unused_parameters=True,
process_group=pg2)
pg3 = torch.distributed.new_group(
range(torch.distributed.get_world_size()))
model_D = torch.nn.parallel.DistributedDataParallel(
model_D,
device_ids=[local_rank],
output_device=local_rank,
find_unused_parameters=True,
process_group=pg3)
torch.autograd.set_detect_anomaly(True)
torch.distributed.barrier()
optimizer_fea = torch.optim.SGD(feature_extractor.parameters(),
lr=cfg.SOLVER.BASE_LR,
momentum=cfg.SOLVER.MOMENTUM,
weight_decay=cfg.SOLVER.WEIGHT_DECAY)
optimizer_fea.zero_grad()
optimizer_cls = torch.optim.SGD(classifier.parameters(),
lr=cfg.SOLVER.BASE_LR * 10,
momentum=cfg.SOLVER.MOMENTUM,
weight_decay=cfg.SOLVER.WEIGHT_DECAY)
optimizer_cls.zero_grad()
optimizer_D = torch.optim.Adam(model_D.parameters(),
lr=cfg.SOLVER.BASE_LR_D,
betas=(0.9, 0.99))
optimizer_D.zero_grad()
output_dir = cfg.OUTPUT_DIR
save_to_disk = local_rank == 0
start_epoch = 0
iteration = 0
if cfg.resume:
logger.info("Loading checkpoint from {}".format(cfg.resume))
checkpoint = torch.load(cfg.resume, map_location=torch.device('cpu'))
model_weights = checkpoint[
'feature_extractor'] if distributed else strip_prefix_if_present(
checkpoint['feature_extractor'], 'module.')
feature_extractor.load_state_dict(model_weights)
classifier_weights = checkpoint[
'classifier'] if distributed else strip_prefix_if_present(
checkpoint['classifier'], 'module.')
classifier.load_state_dict(classifier_weights)
if "model_D" in checkpoint:
logger.info("Loading model_D from {}".format(cfg.resume))
model_D_weights = checkpoint[
'model_D'] if distributed else strip_prefix_if_present(
checkpoint['model_D'], 'module.')
model_D.load_state_dict(model_D_weights)
# if "optimizer_fea" in checkpoint:
# logger.info("Loading optimizer_fea from {}".format(cfg.resume))
# optimizer_fea.load_state_dict(checkpoint['optimizer_fea'])
# if "optimizer_cls" in checkpoint:
# logger.info("Loading optimizer_cls from {}".format(cfg.resume))
# optimizer_cls.load_state_dict(checkpoint['optimizer_cls'])
# if "optimizer_D" in checkpoint:
# logger.info("Loading optimizer_D from {}".format(cfg.resume))
# optimizer_D.load_state_dict(checkpoint['optimizer_D'])
# if "iteration" in checkpoint:
# iteration = checkpoint['iteration']
src_train_data = build_dataset(cfg, mode='train', is_source=True)
tgt_train_data = build_dataset(cfg, mode='train', is_source=False)
if distributed:
src_train_sampler = torch.utils.data.distributed.DistributedSampler(
src_train_data)
tgt_train_sampler = torch.utils.data.distributed.DistributedSampler(
tgt_train_data)
else:
src_train_sampler = None
tgt_train_sampler = None
src_train_loader = torch.utils.data.DataLoader(
src_train_data,
batch_size=batch_size,
shuffle=(src_train_sampler is None),
num_workers=4,
pin_memory=True,
sampler=src_train_sampler,
drop_last=True)
tgt_train_loader = torch.utils.data.DataLoader(
tgt_train_data,
batch_size=batch_size,
shuffle=(tgt_train_sampler is None),
num_workers=4,
pin_memory=True,
sampler=tgt_train_sampler,
drop_last=True)
criterion = torch.nn.CrossEntropyLoss(ignore_index=255)
bce_loss = torch.nn.BCELoss(reduction='none')
max_iters = cfg.SOLVER.MAX_ITER
source_label = 0
target_label = 1
logger.info("Start training")
meters = MetricLogger(delimiter=" ")
feature_extractor.train()
classifier.train()
model_D.train()
start_training_time = time.time()
end = time.time()
for i, ((src_input, src_label, src_name),
(tgt_input, _,
_)) in enumerate(zip(src_train_loader, tgt_train_loader)):
# torch.distributed.barrier()
data_time = time.time() - end
current_lr = adjust_learning_rate(cfg.SOLVER.LR_METHOD,
cfg.SOLVER.BASE_LR,
iteration,
max_iters,
power=cfg.SOLVER.LR_POWER)
current_lr_D = adjust_learning_rate(cfg.SOLVER.LR_METHOD,
cfg.SOLVER.BASE_LR_D,
iteration,
max_iters,
power=cfg.SOLVER.LR_POWER)
for index in range(len(optimizer_fea.param_groups)):
optimizer_fea.param_groups[index]['lr'] = current_lr
for index in range(len(optimizer_cls.param_groups)):
optimizer_cls.param_groups[index]['lr'] = current_lr * 10
for index in range(len(optimizer_D.param_groups)):
optimizer_D.param_groups[index]['lr'] = current_lr_D
# torch.distributed.barrier()
optimizer_fea.zero_grad()
optimizer_cls.zero_grad()
optimizer_D.zero_grad()
src_input = src_input.cuda(non_blocking=True)
src_label = src_label.cuda(non_blocking=True).long()
tgt_input = tgt_input.cuda(non_blocking=True)
src_size = src_input.shape[-2:]
tgt_size = tgt_input.shape[-2:]
inp = torch.cat(
[src_input, F.interpolate(tgt_input.detach(), src_size)])
# try:
src_fea = feature_extractor(inp)[:batch_size]
src_pred = classifier(src_fea, src_size)
temperature = 1.8
src_pred = src_pred.div(temperature)
loss_seg = criterion(src_pred, src_label)
loss_seg.backward()
# torch.distributed.barrier()
# generate soft labels
src_soft_label = F.softmax(src_pred, dim=1).detach()
src_soft_label[src_soft_label > 0.9] = 0.9
tgt_fea = feature_extractor(tgt_input)
tgt_pred = classifier(tgt_fea, tgt_size)
tgt_pred = tgt_pred.div(temperature)
tgt_soft_label = F.softmax(tgt_pred, dim=1)
tgt_soft_label = tgt_soft_label.detach()
tgt_soft_label[tgt_soft_label > 0.9] = 0.9
tgt_D_pred = model_D(tgt_fea, tgt_size)
loss_adv_tgt = 0.001 * soft_label_cross_entropy(
tgt_D_pred,
torch.cat(
(tgt_soft_label, torch.zeros_like(tgt_soft_label)), dim=1))
loss_adv_tgt.backward()
optimizer_fea.step()
optimizer_cls.step()
optimizer_D.zero_grad()
# torch.distributed.barrier()
src_D_pred = model_D(src_fea.detach(), src_size)
loss_D_src = 0.5 * soft_label_cross_entropy(
src_D_pred,
torch.cat(
(src_soft_label, torch.zeros_like(src_soft_label)), dim=1))
loss_D_src.backward()
tgt_D_pred = model_D(tgt_fea.detach(), tgt_size)
loss_D_tgt = 0.5 * soft_label_cross_entropy(
tgt_D_pred,
torch.cat(
(torch.zeros_like(tgt_soft_label), tgt_soft_label), dim=1))
loss_D_tgt.backward()
# torch.distributed.barrier()
optimizer_D.step()
meters.update(loss_seg=loss_seg.item())
meters.update(loss_adv_tgt=loss_adv_tgt.item())
meters.update(loss_D=(loss_D_src.item() + loss_D_tgt.item()))
meters.update(loss_D_src=loss_D_src.item())
meters.update(loss_D_tgt=loss_D_tgt.item())
iteration = iteration + 1
n = src_input.size(0)
batch_time = time.time() - end
end = time.time()
meters.update(time=batch_time, data=data_time)
eta_seconds = meters.time.global_avg * (cfg.SOLVER.STOP_ITER -
iteration)
eta_string = str(datetime.timedelta(seconds=int(eta_seconds)))
if iteration % 20 == 0 or iteration == max_iters:
logger.info(
meters.delimiter.join([
"eta: {eta}",
"iter: {iter}",
"{meters}",
"lr: {lr:.6f}",
"max mem: {memory:.0f}",
]).format(
eta=eta_string,
iter=iteration,
meters=str(meters),
lr=optimizer_fea.param_groups[0]["lr"],
memory=torch.cuda.max_memory_allocated() / 1024.0 / 1024.0,
))
if (iteration == cfg.SOLVER.MAX_ITER or iteration %
cfg.SOLVER.CHECKPOINT_PERIOD == 0) and save_to_disk:
filename = os.path.join(output_dir,
"model_iter{:06d}.pth".format(iteration))
torch.save(
{
'iteration': iteration,
'feature_extractor': feature_extractor.state_dict(),
'classifier': classifier.state_dict(),
'model_D': model_D.state_dict(),
'optimizer_fea': optimizer_fea.state_dict(),
'optimizer_cls': optimizer_cls.state_dict(),
'optimizer_D': optimizer_D.state_dict()
}, filename)
if iteration == cfg.SOLVER.MAX_ITER:
break
if iteration == cfg.SOLVER.STOP_ITER:
break
total_training_time = time.time() - start_training_time
total_time_str = str(datetime.timedelta(seconds=total_training_time))
logger.info("Total training time: {} ({:.4f} s / it)".format(
total_time_str, total_training_time / (cfg.SOLVER.MAX_ITER)))
return feature_extractor, classifier
def train(cfg, local_rank, distributed):
logger = logging.getLogger("BCDM.trainer")
logger.info("Start training")
feature_extractor = build_feature_extractor(cfg)
device = torch.device(cfg.MODEL.DEVICE)
feature_extractor.to(device)
classifier = build_classifier(cfg)
classifier.to(device)
classifier_2 = build_classifier(cfg)
classifier_2.to(device)
if local_rank == 0:
print(feature_extractor)
batch_size = cfg.SOLVER.BATCH_SIZE // 2
if distributed:
pg1 = torch.distributed.new_group(
range(torch.distributed.get_world_size()))
batch_size = int(
cfg.SOLVER.BATCH_SIZE / torch.distributed.get_world_size()) // 2
if not cfg.MODEL.FREEZE_BN:
feature_extractor = torch.nn.SyncBatchNorm.convert_sync_batchnorm(
feature_extractor)
feature_extractor = torch.nn.parallel.DistributedDataParallel(
feature_extractor,
device_ids=[local_rank],
output_device=local_rank,
find_unused_parameters=True,
process_group=pg1)
pg2 = torch.distributed.new_group(
range(torch.distributed.get_world_size()))
classifier = torch.nn.parallel.DistributedDataParallel(
classifier,
device_ids=[local_rank],
output_device=local_rank,
find_unused_parameters=True,
process_group=pg2)
pg3 = torch.distributed.new_group(
range(torch.distributed.get_world_size()))
classifier_2 = torch.nn.parallel.DistributedDataParallel(
classifier_2,
device_ids=[local_rank],
output_device=local_rank,
find_unused_parameters=True,
process_group=pg3)
torch.autograd.set_detect_anomaly(True)
torch.distributed.barrier()
optimizer_fea = torch.optim.SGD(feature_extractor.parameters(),
lr=cfg.SOLVER.BASE_LR,
momentum=cfg.SOLVER.MOMENTUM,
weight_decay=cfg.SOLVER.WEIGHT_DECAY)
optimizer_fea.zero_grad()
optimizer_cls = torch.optim.SGD(list(classifier.parameters()) +
list(classifier_2.parameters()),
lr=cfg.SOLVER.BASE_LR * 10,
momentum=cfg.SOLVER.MOMENTUM,
weight_decay=cfg.SOLVER.WEIGHT_DECAY)
optimizer_cls.zero_grad()
output_dir = cfg.OUTPUT_DIR
save_to_disk = local_rank == 0
iteration = 0
if cfg.resume:
logger.info("Loading checkpoint from {}".format(cfg.resume))
checkpoint = torch.load(cfg.resume, map_location=torch.device('cpu'))
model_weights = checkpoint[
'feature_extractor'] if distributed else strip_prefix_if_present(
checkpoint['feature_extractor'], 'module.')
feature_extractor.load_state_dict(model_weights)
classifier_weights = checkpoint[
'classifier'] if distributed else strip_prefix_if_present(
checkpoint['classifier'], 'module.')
classifier.load_state_dict(classifier_weights)
classifier_2_weights = checkpoint[
'classifier'] if distributed else strip_prefix_if_present(
checkpoint['classifier_2'], 'module.')
classifier_2.load_state_dict(classifier_2_weights)
# if "optimizer_fea" in checkpoint:
# logger.info("Loading optimizer_fea from {}".format(cfg.resume))
# optimizer_fea.load_state_dict(checkpoint['optimizer_fea'])
# if "optimizer_cls" in checkpoint:
# logger.info("Loading optimizer_cls from {}".format(cfg.resume))
# optimizer_cls.load_state_dict(checkpoint['optimizer_cls'])
# if "iteration" in checkpoint:
# iteration = checkpoint['iteration']
src_train_data = build_dataset(cfg, mode='train', is_source=True)
tgt_train_data = build_dataset(cfg, mode='train', is_source=False)
if distributed:
src_train_sampler = torch.utils.data.distributed.DistributedSampler(
src_train_data)
tgt_train_sampler = torch.utils.data.distributed.DistributedSampler(
tgt_train_data)
else:
src_train_sampler = None
tgt_train_sampler = None
src_train_loader = torch.utils.data.DataLoader(
src_train_data,
batch_size=batch_size,
shuffle=(src_train_sampler is None),
num_workers=4,
pin_memory=True,
sampler=src_train_sampler,
drop_last=True)
tgt_train_loader = torch.utils.data.DataLoader(
tgt_train_data,
batch_size=batch_size,
shuffle=(tgt_train_sampler is None),
num_workers=4,
pin_memory=True,
sampler=tgt_train_sampler,
drop_last=True)
criterion = torch.nn.CrossEntropyLoss(ignore_index=255)
max_iters = cfg.SOLVER.MAX_ITER
logger.info("Start training")
meters = MetricLogger(delimiter=" ")
feature_extractor.train()
classifier.train()
classifier_2.train()
start_training_time = time.time()
end = time.time()
for i, ((src_input, src_label, src_name),
(tgt_input, _,
_)) in enumerate(zip(src_train_loader, tgt_train_loader)):
data_time = time.time() - end
current_lr = adjust_learning_rate(cfg.SOLVER.LR_METHOD,
cfg.SOLVER.BASE_LR,
iteration,
max_iters,
power=cfg.SOLVER.LR_POWER)
for index in range(len(optimizer_fea.param_groups)):
optimizer_fea.param_groups[index]['lr'] = current_lr
for index in range(len(optimizer_cls.param_groups)):
optimizer_cls.param_groups[index]['lr'] = current_lr * 10
# Step A: train on source (CE loss) and target (Ent loss)
optimizer_fea.zero_grad()
optimizer_cls.zero_grad()
src_input = src_input.cuda(non_blocking=True)
src_label = src_label.cuda(non_blocking=True).long()
tgt_input = tgt_input.cuda(non_blocking=True)
src_size = src_input.shape[-2:]
tgt_size = tgt_input.shape[-2:]
src_fea = feature_extractor(src_input)
src_pred = classifier(src_fea, src_size)
src_pred_2 = classifier_2(src_fea, src_size)
temperature = 1.8
src_pred = src_pred.div(temperature)
src_pred_2 = src_pred_2.div(temperature)
# source segmentation loss
loss_seg = criterion(src_pred, src_label) + criterion(
src_pred_2, src_label)
tgt_fea = feature_extractor(tgt_input)
tgt_pred = classifier(tgt_fea, tgt_size)
tgt_pred_2 = classifier_2(tgt_fea, tgt_size)
tgt_pred = F.softmax(tgt_pred)
tgt_pred_2 = F.softmax(tgt_pred_2)
loss_ent = entropy_loss(tgt_pred) + entropy_loss(tgt_pred_2)
total_loss = loss_seg + cfg.SOLVER.ENT_LOSS * loss_ent
total_loss.backward()
# torch.distributed.barrier()
optimizer_fea.step()
optimizer_cls.step()
# Step B: train bi-classifier to maximize loss_cdd
optimizer_fea.zero_grad()
optimizer_cls.zero_grad()
src_fea = feature_extractor(src_input)
src_pred = classifier(src_fea, src_size)
src_pred_2 = classifier_2(src_fea, src_size)
temperature = 1.8
src_pred = src_pred.div(temperature)
src_pred_2 = src_pred_2.div(temperature)
loss_seg = criterion(src_pred, src_label) + criterion(
src_pred_2, src_label)
tgt_fea = feature_extractor(tgt_input)
tgt_pred = classifier(tgt_fea, tgt_size)
tgt_pred_2 = classifier_2(tgt_fea, tgt_size)
tgt_pred = F.softmax(tgt_pred)
tgt_pred_2 = F.softmax(tgt_pred_2)
loss_ent = entropy_loss(tgt_pred) + entropy_loss(tgt_pred_2)
loss_cdd = discrepancy_calc(tgt_pred, tgt_pred_2)
total_loss = loss_seg - cfg.SOLVER.CDD_LOSS * loss_cdd + cfg.SOLVER.ENT_LOSS * loss_ent
total_loss.backward()
optimizer_cls.step()
# Step C: train feature extractor to min loss_cdd
for k in range(cfg.SOLVER.NUM_K):
optimizer_fea.zero_grad()
optimizer_cls.zero_grad()
tgt_fea = feature_extractor(tgt_input)
tgt_pred = classifier(tgt_fea, tgt_size)
tgt_pred_2 = classifier_2(tgt_fea, tgt_size)
tgt_pred = F.softmax(tgt_pred)
tgt_pred_2 = F.softmax(tgt_pred_2)
loss_ent = entropy_loss(tgt_pred) + entropy_loss(tgt_pred_2)
loss_cdd = discrepancy_calc(tgt_pred, tgt_pred_2)
total_loss = cfg.SOLVER.CDD_LOSS * loss_cdd + cfg.SOLVER.ENT_LOSS * loss_ent
total_loss.backward()
optimizer_fea.zero_grad()
meters.update(loss_seg=loss_seg.item())
meters.update(loss_cdd=loss_cdd.item())
meters.update(loss_ent=loss_ent.item())
iteration = iteration + 1
n = src_input.size(0)
batch_time = time.time() - end
end = time.time()
meters.update(time=batch_time, data=data_time)
eta_seconds = meters.time.global_avg * (cfg.SOLVER.STOP_ITER -
iteration)
eta_string = str(datetime.timedelta(seconds=int(eta_seconds)))
if iteration % 20 == 0 or iteration == max_iters:
logger.info(
meters.delimiter.join([
"eta: {eta}",
"iter: {iter}",
"{meters}",
"lr: {lr:.6f}",
"max mem: {memory:.0f}",
]).format(
eta=eta_string,
iter=iteration,
meters=str(meters),
lr=optimizer_fea.param_groups[0]["lr"],
memory=torch.cuda.max_memory_allocated() / 1024.0 / 1024.0,
))
if (iteration == cfg.SOLVER.MAX_ITER or iteration %
cfg.SOLVER.CHECKPOINT_PERIOD == 0) and save_to_disk:
filename = os.path.join(output_dir,
"model_iter{:06d}.pth".format(iteration))
torch.save(
{
'iteration': iteration,
'feature_extractor': feature_extractor.state_dict(),
'classifier': classifier.state_dict(),
'classifier_2': classifier_2.state_dict(),
'optimizer_fea': optimizer_fea.state_dict(),
'optimizer_cls': optimizer_cls.state_dict()
}, filename)
if iteration == cfg.SOLVER.MAX_ITER:
break
if iteration == cfg.SOLVER.STOP_ITER:
break
total_training_time = time.time() - start_training_time
total_time_str = str(datetime.timedelta(seconds=total_training_time))
logger.info("Total training time: {} ({:.4f} s / it)".format(
total_time_str, total_training_time / cfg.SOLVER.MAX_ITER))
return feature_extractor, classifier, classifier_2
def __init__(self, args, logger):
self.args = args
self.logger = logger
if get_rank() == 0:
TBWriter.init(
os.path.join(args.project_dir, args.task_dir, "tbevents")
)
self.device = torch.device(args.device)
self.meters = MetricLogger(delimiter=" ")
# image transform
input_transform = transforms.Compose(
[
transforms.ToTensor(),
transforms.Normalize(
[0.485, 0.456, 0.406], [0.229, 0.224, 0.225]
),
]
)
# dataset and dataloader
data_kwargs = {
"transform": input_transform,
"base_size": args.base_size,
"crop_size": args.crop_size,
"root": args.dataroot,
}
train_dataset = get_segmentation_dataset(
args.dataset, split="train", mode="train", **data_kwargs
)
val_dataset = get_segmentation_dataset(
args.dataset, split="val", mode="val", **data_kwargs
)
args.iters_per_epoch = len(train_dataset) // (
args.num_gpus * args.batch_size
)
args.max_iters = args.epochs * args.iters_per_epoch
train_sampler = make_data_sampler(
train_dataset, shuffle=True, distributed=args.distributed
)
train_batch_sampler = make_batch_data_sampler(
train_sampler, args.batch_size, args.max_iters
)
val_sampler = make_data_sampler(val_dataset, False, args.distributed)
val_batch_sampler = make_batch_data_sampler(
val_sampler, args.batch_size
)
self.train_loader = data.DataLoader(
dataset=train_dataset,
batch_sampler=train_batch_sampler,
num_workers=args.workers,
pin_memory=True,
)
self.val_loader = data.DataLoader(
dataset=val_dataset,
batch_sampler=val_batch_sampler,
num_workers=args.workers,
pin_memory=True,
)
# create network
BatchNorm2d = nn.SyncBatchNorm if args.distributed else nn.BatchNorm2d
self.model = get_segmentation_model(
model=args.model,
dataset=args.dataset,
backbone=args.backbone,
aux=args.aux,
jpu=args.jpu,
norm_layer=BatchNorm2d,
).to(self.device)
# resume checkpoint if needed
if args.resume:
if os.path.isfile(args.resume):
name, ext = os.path.splitext(args.resume)
assert (
ext == ".pkl" or ".pth"
), "Sorry only .pth and .pkl files supported."
print("Resuming training, loading {}...".format(args.resume))
self.model.load_state_dict(
torch.load(
args.resume, map_location=lambda storage, loc: storage
)
)
# create criterion
self.criterion = get_segmentation_loss(
args.model,
use_ohem=args.use_ohem,
aux=args.aux,
aux_weight=args.aux_weight,
ignore_index=-1,
).to(self.device)
# optimizer, for model just includes pretrained, head and auxlayer
params_list = list()
if hasattr(self.model, "pretrained"):
params_list.append(
{"params": self.model.pretrained.parameters(), "lr": args.lr}
)
if hasattr(self.model, "exclusive"):
for module in self.model.exclusive:
params_list.append(
{
"params": getattr(self.model, module).parameters(),
"lr": args.lr * args.lr_scale,
}
)
self.optimizer = torch.optim.SGD(
params_list,
lr=args.lr,
momentum=args.momentum,
weight_decay=args.weight_decay,
)
# lr scheduling
self.lr_scheduler = get_lr_scheduler(self.optimizer, args)
if args.distributed:
self.model = nn.parallel.DistributedDataParallel(
self.model,
device_ids=[args.local_rank],
output_device=args.local_rank,
)
# evaluation metrics
self.metric = SegmentationMetric(train_dataset.num_class)
self.best_pred = 0.0