示例#1
0
def get_dataloader():
    # TODO(xwd): Adaptive normalization by some large image.
    # E.g. In medical image processing, WSI image is very large and different to ordinary images.

    value_scale = 255
    mean = [0.485, 0.456, 0.406]
    mean = [item * value_scale for item in mean]
    std = [0.229, 0.224, 0.225]
    std = [item * value_scale for item in std]

    train_transform = transform.Compose([
        transform.RandomScale([cfg['scale_min'], cfg['scale_max']]),
        transform.RandomRotate([cfg['rotate_min'], cfg['rotate_max']],
                               padding=mean,
                               ignore_label=cfg['ignore_label']),
        transform.RandomGaussianBlur(),
        transform.RandomHorizontallyFlip(),
        transform.RandomCrop([cfg['train_h'], cfg['train_w']],
                             crop_type='rand',
                             padding=mean,
                             ignore_label=cfg['ignore_label']),
        transform.ToTensor(),
        transform.Normalize(mean=mean, std=std)
    ])

    train_data = cityscapes.Cityscapes(cfg['data_path'],
                                       split='train',
                                       transform=train_transform)

    # Use data sampler to make sure each GPU loads specific parts of dataset to avoid data reduntant.
    train_sampler = DistributedSampler(train_data)

    train_loader = DataLoader(train_data,
                              batch_size=cfg['batch_size'] //
                              cfg['world_size'],
                              shuffle=(train_sampler is None),
                              num_workers=4,
                              pin_memory=True,
                              sampler=train_sampler,
                              drop_last=True)

    return train_loader, train_sampler
示例#2
0
def main(train_args):
    print('No of classes', doc.num_classes)
    if train_args['network'] == 'psp':
        net = PSPNet(num_classes=doc.num_classes,
                     resnet=resnet,
                     res_path=res_path).cuda()
    elif train_args['network'] == 'mfcn':
        net = MFCN(num_classes=doc.num_classes, use_aux=True).cuda()
    elif train_args['network'] == 'psppen':
        net = PSPNet(num_classes=doc.num_classes,
                     resnet=resnet,
                     res_path=res_path).cuda()
    print("number of cuda devices = ", torch.cuda.device_count())
    if len(train_args['snapshot']) == 0:
        curr_epoch = 1
        train_args['best_record'] = {
            'epoch': 0,
            'val_loss': 1e10,
            'acc': 0,
            'acc_cls': 0,
            'mean_iu': 0,
            'fwavacc': 0
        }
    else:
        print('training resumes from ' + train_args['snapshot'])
        net.load_state_dict(
            torch.load(
                os.path.join(ckpt_path, 'model_' + exp_name,
                             train_args['snapshot'])))
        split_snapshot = train_args['snapshot'].split('_')
        curr_epoch = int(split_snapshot[1]) + 1
        train_args['best_record'] = {
            'epoch': int(split_snapshot[1]),
            'val_loss': float(split_snapshot[3]),
            'acc': float(split_snapshot[5]),
            'acc_cls': float(split_snapshot[7]),
            'mean_iu': float(split_snapshot[9]),
            'fwavacc': float(split_snapshot[11])
        }
    net = torch.nn.DataParallel(net,
                                device_ids=list(
                                    range(torch.cuda.device_count())))
    net.train()
    mean_std = ([0.9584, 0.9588, 0.9586], [0.1246, 0.1223, 0.1224])
    weight = torch.FloatTensor(doc.num_classes)
    #weight[0] = 1.0/0.5511 # background
    train_simul_transform = simul_transforms.Compose([
        simul_transforms.RandomSized(train_args['input_size']),
        simul_transforms.RandomRotate(3),
        #simul_transforms.RandomHorizontallyFlip()
        simul_transforms.Scale(train_args['input_size']),
        simul_transforms.CenterCrop(train_args['input_size'])
    ])
    val_simul_transform = simul_transforms.Scale(train_args['input_size'])
    train_input_transform = standard_transforms.Compose([
        extended_transforms.RandomGaussianBlur(),
        standard_transforms.ToTensor(),
        standard_transforms.Normalize(*mean_std)
    ])
    val_input_transform = standard_transforms.Compose([
        standard_transforms.ToTensor(),
        standard_transforms.Normalize(*mean_std)
    ])
    target_transform = extended_transforms.MaskToTensor()
    train_set = doc.DOC('train',
                        Dataroot,
                        joint_transform=train_simul_transform,
                        transform=train_input_transform,
                        target_transform=target_transform)
    train_loader = DataLoader(train_set,
                              batch_size=train_args['train_batch_size'],
                              num_workers=1,
                              shuffle=True,
                              drop_last=True)
    train_loader_temp = DataLoader(train_set,
                                   batch_size=1,
                                   num_workers=1,
                                   shuffle=True,
                                   drop_last=True)
    train_args['No_train_images'] = len(train_loader_temp)
    del train_loader_temp
    if train_args['No_train_images'] == 87677:
        train_args['Type_of_train_image'] = 'All Synthetic slide image'
    elif train_args['No_train_images'] == 150:
        train_args['Type_of_train_image'] = 'Real image'
    elif train_args['No_train_images'] == 84641:
        train_args['Type_of_train_image'] = 'Synthetic image'
    elif train_args['No_train_images'] == 151641:
        train_args['Type_of_train_image'] = 'Real + Synthetic image'
    val_set = doc.DOC('val',
                      Dataroot,
                      joint_transform=val_simul_transform,
                      transform=val_input_transform,
                      target_transform=target_transform)
    val_loader = DataLoader(val_set,
                            batch_size=1,
                            num_workers=1,
                            shuffle=False,
                            drop_last=True)
    #criterion = CrossEntropyLoss2d(weight = weight, size_average = True, ignore_index = doc.ignore_label).cuda()
    criterion = CrossEntropyLoss2d(size_average=True,
                                   ignore_index=doc.ignore_label).cuda()
    optimizer = optim.SGD([{
        'params': [
            param
            for name, param in net.named_parameters() if name[-4:] == 'bias'
        ],
        'lr':
        2 * train_args['lr']
    }, {
        'params': [
            param
            for name, param in net.named_parameters() if name[-4:] != 'bias'
        ],
        'lr':
        train_args['lr'],
        'weight_decay':
        train_args['weight_decay']
    }],
                          momentum=train_args['momentum'])
    if len(train_args['snapshot']) > 0:
        optimizer.load_state_dict(
            torch.load(
                os.path.join(ckpt_path, 'model_' + exp_name,
                             'opt_' + train_args['snapshot'])))
        optimizer.param_groups[0]['lr'] = 2 * train_args['lr']
        optimizer.param_groups[1]['lr'] = train_args['lr']
    check_mkdir(ckpt_path)
    check_mkdir(os.path.join(ckpt_path, exp_name))
    open(
        os.path.join(ckpt_path, exp_name,
                     str(datetime.datetime.now()) + '.txt'),
        'w').write(str(train_args) + '\n\n')
    train(train_loader, net, criterion, optimizer, curr_epoch, train_args,
          val_loader)
def main(train_args):
    net = PSPNet(num_classes=voc.num_classes).cuda()

    if len(train_args['snapshot']) == 0:
        curr_epoch = 1
        train_args['best_record'] = {'epoch': 0, 'val_loss': 1e10, 'acc': 0, 'acc_cls': 0, 'mean_iu': 0, 'fwavacc': 0}
    else:
        print ('training resumes from ' + train_args['snapshot'])
        net.load_state_dict(torch.load(os.path.join(ckpt_path, exp_name, train_args['snapshot'])))
        split_snapshot = train_args['snapshot'].split('_')
        curr_epoch = int(split_snapshot[1]) + 1
        train_args['best_record'] = {'epoch': int(split_snapshot[1]), 'val_loss': float(split_snapshot[3]),
                                     'acc': float(split_snapshot[5]), 'acc_cls': float(split_snapshot[7]),
                                     'mean_iu': float(split_snapshot[9]), 'fwavacc': float(split_snapshot[11])}

    net.train()

    mean_std = ([0.485, 0.456, 0.406], [0.229, 0.224, 0.225])

    train_simul_transform = simul_transforms.Compose([
        simul_transforms.RandomSized(train_args['input_size']),
        simul_transforms.RandomRotate(10),
        simul_transforms.RandomHorizontallyFlip()
    ])
    val_simul_transform = simul_transforms.Scale(train_args['input_size'])
    train_input_transform = standard_transforms.Compose([
        extended_transforms.RandomGaussianBlur(),
        standard_transforms.ToTensor(),
        standard_transforms.Normalize(*mean_std)
    ])
    val_input_transform = standard_transforms.Compose([
        standard_transforms.ToTensor(),
        standard_transforms.Normalize(*mean_std)
    ])
    target_transform = extended_transforms.MaskToTensor()
    restore_transform = standard_transforms.Compose([
        extended_transforms.DeNormalize(*mean_std),
        standard_transforms.ToPILImage(),
    ])
    visualize = standard_transforms.Compose([
        standard_transforms.Scale(400),
        standard_transforms.CenterCrop(400),
        standard_transforms.ToTensor()
    ])

    train_set = voc.VOC('train', joint_transform=train_simul_transform, transform=train_input_transform,
                        target_transform=target_transform)
    train_loader = DataLoader(train_set, batch_size=train_args['train_batch_size'], num_workers=8, shuffle=True)
    val_set = voc.VOC('val', joint_transform=val_simul_transform, transform=val_input_transform,
                      target_transform=target_transform)
    val_loader = DataLoader(val_set, batch_size=1, num_workers=8, shuffle=False)

    criterion = CrossEntropyLoss2d(size_average=True, ignore_index=voc.ignore_label).cuda()

    optimizer = optim.SGD([
        {'params': [param for name, param in net.named_parameters() if name[-4:] == 'bias'],
         'lr': 2 * train_args['lr']},
        {'params': [param for name, param in net.named_parameters() if name[-4:] != 'bias'],
         'lr': train_args['lr'], 'weight_decay': train_args['weight_decay']}
    ], momentum=train_args['momentum'])

    if len(train_args['snapshot']) > 0:
        optimizer.load_state_dict(torch.load(os.path.join(ckpt_path, exp_name, 'opt_' + train_args['snapshot'])))
        optimizer.param_groups[0]['lr'] = 2 * train_args['lr']
        optimizer.param_groups[1]['lr'] = train_args['lr']

    check_mkdir(ckpt_path)
    check_mkdir(os.path.join(ckpt_path, exp_name))
    open(os.path.join(ckpt_path, exp_name, str(datetime.datetime.now()) + '.txt'), 'w').write(str(train_args) + '\n\n')

    train(train_loader, net, criterion, optimizer, curr_epoch, train_args, val_loader, restore_transform, visualize)
def main():
    """Create the model and start the training."""
    or_nyu_dict = {
        0: 255,
        1: 16,
        2: 40,
        3: 39,
        4: 7,
        5: 14,
        6: 39,
        7: 12,
        8: 38,
        9: 40,
        10: 10,
        11: 6,
        12: 40,
        13: 39,
        14: 39,
        15: 40,
        16: 18,
        17: 40,
        18: 4,
        19: 40,
        20: 40,
        21: 5,
        22: 40,
        23: 40,
        24: 30,
        25: 36,
        26: 38,
        27: 40,
        28: 3,
        29: 40,
        30: 40,
        31: 9,
        32: 38,
        33: 40,
        34: 40,
        35: 40,
        36: 34,
        37: 37,
        38: 40,
        39: 40,
        40: 39,
        41: 8,
        42: 3,
        43: 1,
        44: 2,
        45: 22
    }
    or_nyu_map = lambda x: or_nyu_dict.get(x, x) - 1
    or_nyu_map = np.vectorize(or_nyu_map)

    device = torch.device("cuda" if not args.cpu else "cpu")

    w, h = map(int, args.input_size.split(','))
    input_size = (w, h)

    w, h = map(int, args.input_size_target.split(','))
    input_size_target = (w, h)

    cudnn.enabled = True
    args.or_nyu_map = or_nyu_map
    # Create network
    if args.model == 'DeepLab':
        model = DeeplabMulti(num_classes=args.num_classes)
        if args.restore_from[:4] == 'http':
            saved_state_dict = model_zoo.load_url(args.restore_from)
        elif args.restore_from == "":
            saved_state_dict = None
        else:
            saved_state_dict = torch.load(args.restore_from)

        new_params = model.state_dict().copy()
        for i in saved_state_dict:
            # Scale.layer5.conv2d_list.3.weight
            i_parts = i.split('.')
            # print i_parts
            if not args.num_classes == 40 or not i_parts[1] == 'layer5':
                new_params['.'.join(i_parts[1:])] = saved_state_dict[i]
                # print i_parts
        model.load_state_dict(new_params)

    model.train()
    model.to(device)

    cudnn.benchmark = True
    if args.mode != "baseline" and args.mode != "baseline_tar":
        # init D
        model_D1 = FCDiscriminator(num_classes=args.num_classes).to(device)
        model_D2 = FCDiscriminator(num_classes=args.num_classes).to(device)

        model_D1.train()
        model_D1.to(device)

        model_D2.train()
        model_D2.to(device)

    if not os.path.exists(args.snapshot_dir):
        os.makedirs(args.snapshot_dir)

    scale_min = 0.5
    scale_max = 2.0
    rotate_min = -10
    rotate_max = 10
    ignore_label = 255
    value_scale = 255
    mean = [0.485, 0.456, 0.406]
    mean = [item * value_scale for item in mean]
    std = [0.229, 0.224, 0.225]
    std = [item * value_scale for item in std]

    args.width = w
    args.height = h
    train_transform = transforms.Compose([
        # et.ExtResize( 512 ),
        transforms.RandScale([scale_min, scale_max]),
        transforms.RandRotate([rotate_min, rotate_max],
                              padding=IMG_MEAN_RGB,
                              ignore_label=ignore_label),
        transforms.RandomGaussianBlur(),
        transforms.RandomHorizontalFlip(),
        transforms.Crop([args.height + 1, args.width + 1],
                        crop_type='rand',
                        padding=IMG_MEAN_RGB,
                        ignore_label=ignore_label),
        #et.ExtRandomCrop(size=(opts.crop_size, opts.crop_size)),
        #et.ExtColorJitter(brightness=0.5, contrast=0.5, saturation=0.5),
        #et.ExtRandomHorizontalFlip(),
        transforms.ToTensor(),
        transforms.Normalize(mean=IMG_MEAN, std=[1, 1, 1]),
    ])

    val_transform = transforms.Compose([
        # et.ExtResize( 512 ),
        transforms.Crop([args.height + 1, args.width + 1],
                        crop_type='center',
                        padding=IMG_MEAN_RGB,
                        ignore_label=ignore_label),
        transforms.ToTensor(),
        transforms.Normalize(mean=IMG_MEAN, std=[1, 1, 1]),
    ])
    if args.mode != "baseline_tar":
        src_train_dst = OpenRoomsSegmentation(root=args.data_dir,
                                              opt=args,
                                              split='train',
                                              transform=train_transform,
                                              imWidth=args.width,
                                              imHeight=args.height,
                                              remap_labels=args.or_nyu_map)
    else:
        src_train_dst = NYU_Labelled(root=args.data_dir_target,
                                     opt=args,
                                     split='train',
                                     transform=train_transform,
                                     imWidth=args.width,
                                     imHeight=args.height,
                                     phase="TRAIN",
                                     randomize=True)
    tar_train_dst = NYU(root=args.data_dir_target,
                        opt=args,
                        split='train',
                        transform=train_transform,
                        imWidth=args.width,
                        imHeight=args.height,
                        phase="TRAIN",
                        randomize=True,
                        mode=args.mode)
    tar_val_dst = NYU(root=args.data_dir,
                      opt=args,
                      split='val',
                      transform=val_transform,
                      imWidth=args.width,
                      imHeight=args.height,
                      phase="TRAIN",
                      randomize=False)
    trainloader = data.DataLoader(src_train_dst,
                                  batch_size=args.batch_size,
                                  shuffle=True,
                                  num_workers=args.num_workers,
                                  pin_memory=True)

    trainloader_iter = enumerate(trainloader)

    targetloader = data.DataLoader(tar_train_dst,
                                   batch_size=args.batch_size,
                                   shuffle=True,
                                   num_workers=args.num_workers,
                                   pin_memory=True)

    targetloader_iter = enumerate(targetloader)

    # implement model.optim_parameters(args) to handle different models' lr setting

    optimizer = optim.SGD(model.optim_parameters(args),
                          lr=args.learning_rate,
                          momentum=args.momentum,
                          weight_decay=args.weight_decay)
    optimizer.zero_grad()
    if args.mode != "baseline" and args.mode != "baseline_tar":
        optimizer_D1 = optim.Adam(model_D1.parameters(),
                                  lr=args.learning_rate_D,
                                  betas=(0.9, 0.99))
        optimizer_D1.zero_grad()

        optimizer_D2 = optim.Adam(model_D2.parameters(),
                                  lr=args.learning_rate_D,
                                  betas=(0.9, 0.99))
        optimizer_D2.zero_grad()

    if args.gan == 'Vanilla':
        bce_loss = torch.nn.BCEWithLogitsLoss()
    elif args.gan == 'LS':
        bce_loss = torch.nn.MSELoss()
    seg_loss = torch.nn.CrossEntropyLoss(ignore_index=255)

    interp = nn.Upsample(size=(input_size[1] + 1, input_size[0] + 1),
                         mode='bilinear',
                         align_corners=True)
    interp_target = nn.Upsample(size=(input_size_target[1] + 1,
                                      input_size_target[0] + 1),
                                mode='bilinear',
                                align_corners=True)

    # labels for adversarial training
    source_label = 0
    target_label = 1

    # set up tensor board
    if args.tensorboard:
        if not os.path.exists(args.log_dir):
            os.makedirs(args.log_dir)

        writer = SummaryWriter(args.log_dir)

    for i_iter in range(args.num_steps):

        loss_seg_value1 = 0
        loss_seg_value1_tar = 0
        loss_adv_target_value1 = 0
        loss_D_value1 = 0

        loss_seg_value2 = 0
        loss_seg_value2_tar = 0
        loss_adv_target_value2 = 0
        loss_D_value2 = 0

        optimizer.zero_grad()
        adjust_learning_rate(optimizer, i_iter)
        if args.mode != "baseline" and args.mode != "baseline_tar":
            optimizer_D1.zero_grad()
            optimizer_D2.zero_grad()
            adjust_learning_rate_D(optimizer_D1, i_iter)
            adjust_learning_rate_D(optimizer_D2, i_iter)
        sample_src = None
        sample_tar = None
        sample_res_src = None
        sample_res_tar = None
        sample_gt_src = None
        sample_gt_tar = None
        for sub_i in range(args.iter_size):

            # train G
            if args.mode != "baseline" and args.mode != "baseline_tar":
                # don't accumulate grads in D
                for param in model_D1.parameters():
                    param.requires_grad = False

                for param in model_D2.parameters():
                    param.requires_grad = False

            # train with source
            try:
                _, batch = trainloader_iter.__next__()
            except:
                trainloader_iter = enumerate(trainloader)
                _, batch = trainloader_iter.__next__()
            images, labels, _ = batch
            sample_src = images.clone()
            sample_gt_src = labels.clone()

            images = images.to(device)
            labels = labels.long().to(device)

            pred1, pred2 = model(images)
            pred1 = interp(pred1)
            pred2 = interp(pred2)
            sample_pred_src = pred2.detach().cpu()

            loss_seg1 = seg_loss(pred1, labels)
            loss_seg2 = seg_loss(pred2, labels)
            loss = loss_seg2 + args.lambda_seg * loss_seg1

            # proper normalization
            loss = loss / args.iter_size
            loss.backward()
            loss_seg_value1 += loss_seg1.item() / args.iter_size
            loss_seg_value2 += loss_seg2.item() / args.iter_size

            # train with target
            try:
                _, batch = targetloader_iter.__next__()
            except:
                targetloader_iter = enumerate(targetloader)
                _, batch = targetloader_iter.__next__()
            images, tar_labels, _, labelled = batch
            n_labelled = labelled.sum().detach().item()
            batch_size = images.shape[0]
            sample_tar = images.clone()
            sample_gt_tar = tar_labels.clone()
            images = images.to(device)

            pred_target1, pred_target2 = model(images)
            pred_target1 = interp_target(pred_target1)
            pred_target2 = interp_target(pred_target2)
            #print("N_labelled {}".format(n_labelled))
            if args.mode == "sda" and n_labelled != 0:
                labelled = labelled.to(device) == 1
                tar_labels = tar_labels.to(device)
                loss_seg1_tar = seg_loss(pred_target1[labelled],
                                         tar_labels[labelled])
                loss_seg2_tar = seg_loss(pred_target2[labelled],
                                         tar_labels[labelled])
                loss_tar_labelled = loss_seg2_tar + args.lambda_seg * loss_seg1_tar
                loss_tar_labelled = loss_tar_labelled / args.iter_size
                loss_seg_value1_tar += loss_seg1_tar.item() / args.iter_size
                loss_seg_value2_tar += loss_seg2_tar.item() / args.iter_size
            else:
                loss_tar_labelled = torch.zeros(
                    1, requires_grad=True).float().to(device)
            # proper normalization
            sample_pred_tar = pred_target2.detach().cpu()
            if args.mode != "baseline" and args.mode != "baseline_tar":
                D_out1 = model_D1(F.softmax(pred_target1))
                D_out2 = model_D2(F.softmax(pred_target2))

                loss_adv_target1 = bce_loss(
                    D_out1,
                    torch.FloatTensor(
                        D_out1.data.size()).fill_(source_label).to(device))

                loss_adv_target2 = bce_loss(
                    D_out2,
                    torch.FloatTensor(
                        D_out2.data.size()).fill_(source_label).to(device))

                loss = args.lambda_adv_target1 * loss_adv_target1 + args.lambda_adv_target2 * loss_adv_target2
                loss = loss / args.iter_size + loss_tar_labelled
                #loss = loss_tar_labelled
                loss.backward()
                loss_adv_target_value1 += loss_adv_target1.item(
                ) / args.iter_size
                loss_adv_target_value2 += loss_adv_target2.item(
                ) / args.iter_size
                # train D

                # bring back requires_grad
                for param in model_D1.parameters():
                    param.requires_grad = True

                for param in model_D2.parameters():
                    param.requires_grad = True

                # train with source
                pred1 = pred1.detach()
                pred2 = pred2.detach()

                D_out1 = model_D1(F.softmax(pred1))
                D_out2 = model_D2(F.softmax(pred2))

                loss_D1 = bce_loss(
                    D_out1,
                    torch.FloatTensor(
                        D_out1.data.size()).fill_(source_label).to(device))

                loss_D2 = bce_loss(
                    D_out2,
                    torch.FloatTensor(
                        D_out2.data.size()).fill_(source_label).to(device))

                loss_D1 = loss_D1 / args.iter_size / 2
                loss_D2 = loss_D2 / args.iter_size / 2

                loss_D1.backward()
                loss_D2.backward()

                loss_D_value1 += loss_D1.item()
                loss_D_value2 += loss_D2.item()

                # train with target
                pred_target1 = pred_target1.detach()
                pred_target2 = pred_target2.detach()

                D_out1 = model_D1(F.softmax(pred_target1))
                D_out2 = model_D2(F.softmax(pred_target2))

                loss_D1 = bce_loss(
                    D_out1,
                    torch.FloatTensor(
                        D_out1.data.size()).fill_(target_label).to(device))

                loss_D2 = bce_loss(
                    D_out2,
                    torch.FloatTensor(
                        D_out2.data.size()).fill_(target_label).to(device))

                loss_D1 = loss_D1 / args.iter_size / 2
                loss_D2 = loss_D2 / args.iter_size / 2

                loss_D1.backward()
                loss_D2.backward()

                loss_D_value1 += loss_D1.item()
                loss_D_value2 += loss_D2.item()

        optimizer.step()
        if args.mode != "baseline" and args.mode != "baseline_tar":
            optimizer_D1.step()
            optimizer_D2.step()
        if args.tensorboard:
            scalar_info = {
                'loss_seg1': loss_seg_value1,
                'loss_seg2': loss_seg_value2,
                'loss_adv_target1': loss_adv_target_value1,
                'loss_adv_target2': loss_adv_target_value2,
                'loss_D1': loss_D_value1,
                'loss_D2': loss_D_value2,
                'loss_seg1_tar': loss_seg_value1_tar,
                'loss_seg2_tar': loss_seg_value2_tar,
            }

            if i_iter % 10 == 0:
                for key, val in scalar_info.items():
                    writer.add_scalar(key, val, i_iter)
            if i_iter % 1000 == 0:
                img = sample_src.cpu()[:, [2, 1, 0], :, :] + torch.from_numpy(
                    np.array(IMG_MEAN_RGB).reshape(1, 3, 1, 1)).float()
                img = img.type(torch.uint8)
                writer.add_images("Src/Images", img, i_iter)
                label = tar_train_dst.decode_target(sample_gt_src).transpose(
                    0, 3, 1, 2)
                writer.add_images("Src/Labels", label, i_iter)
                preds = sample_pred_src.permute(0, 2, 3, 1).cpu().numpy()
                preds = np.asarray(np.argmax(preds, axis=3), dtype=np.uint8)
                preds = tar_train_dst.decode_target(preds).transpose(
                    0, 3, 1, 2)
                writer.add_images("Src/Preds", preds, i_iter)

                tar_img = sample_tar.cpu()[:,
                                           [2, 1, 0], :, :] + torch.from_numpy(
                                               np.array(IMG_MEAN_RGB).reshape(
                                                   1, 3, 1, 1)).float()
                tar_img = tar_img.type(torch.uint8)
                writer.add_images("Tar/Images", tar_img, i_iter)
                tar_label = tar_train_dst.decode_target(
                    sample_gt_tar).transpose(0, 3, 1, 2)
                writer.add_images("Tar/Labels", tar_label, i_iter)
                tar_preds = sample_pred_tar.permute(0, 2, 3, 1).cpu().numpy()
                tar_preds = np.asarray(np.argmax(tar_preds, axis=3),
                                       dtype=np.uint8)
                tar_preds = tar_train_dst.decode_target(tar_preds).transpose(
                    0, 3, 1, 2)
                writer.add_images("Tar/Preds", tar_preds, i_iter)
        print('exp = {}'.format(args.snapshot_dir))
        print(
            'iter = {0:8d}/{1:8d}, loss_seg1 = {2:.3f} loss_seg2 = {3:.3f} loss_adv1 = {4:.3f}, loss_adv2 = {5:.3f} loss_D1 = {6:.3f} loss_D2 = {7:.3f} loss_seg1_tar={8:.3f} loss_seg2_tar={9:.3f}'
            .format(i_iter, args.num_steps, loss_seg_value1, loss_seg_value2,
                    loss_adv_target_value1, loss_adv_target_value2,
                    loss_D_value1, loss_D_value2, loss_seg_value1_tar,
                    loss_seg_value2_tar))

        if i_iter >= args.num_steps_stop - 1:
            print('save model ...')
            torch.save(
                model.state_dict(),
                osp.join(args.snapshot_dir,
                         'OR_' + str(args.num_steps_stop) + '.pth'))
            if args.mode != "baseline" and args.mode != "baseline_tar":
                torch.save(
                    model_D1.state_dict(),
                    osp.join(args.snapshot_dir,
                             'OR_' + str(args.num_steps_stop) + '_D1.pth'))
                torch.save(
                    model_D2.state_dict(),
                    osp.join(args.snapshot_dir,
                             'OR_' + str(args.num_steps_stop) + '_D2.pth'))
            break

        if i_iter % args.save_pred_every == 0 and i_iter != 0:
            print('taking snapshot ...')
            torch.save(
                model.state_dict(),
                osp.join(args.snapshot_dir, 'OR_' + str(i_iter) + '.pth'))
            if args.mode != "baseline" and args.mode != "baseline_tar":
                torch.save(
                    model_D1.state_dict(),
                    osp.join(args.snapshot_dir,
                             'OR_' + str(i_iter) + '_D1.pth'))
                torch.save(
                    model_D2.state_dict(),
                    osp.join(args.snapshot_dir,
                             'OR_' + str(i_iter) + '_D2.pth'))

    if args.tensorboard:
        writer.close()