def train_c(epoch,netd_c,optd_c,loader,step,opt,Q):
netd_c.train()
pbar = tqdm(enumerate(loader))
for _, (image_c, label) in pbar:
index = label[:, 1]
index = Variable(index).cuda()
label = label[:, 0]
# print(image_c.size())
# plt.figure(0)
# if torch.sum(label==1)>1:
# plt.imshow(np.transpose((image_c[label == 1][0].cpu().numpy() + 1) / 2, [1, 2, 0]))
# plt.show()
# print(image_c.max(), image_c.min())
real_label = label.cuda().long()
real_loss_c = torch.zeros(1).cuda()
if torch.sum(torch.ones(real_label.size())[index==1])+ torch.sum(torch.ones(real_label.size())[index==0])>0:
real_input_c = Variable(image_c).cuda()
_, real_cls = netd_c(real_input_c)
if torch.sum(torch.ones(real_label.size())[index==1]) > 0:
real_loss_c += clip_cross_entropy(real_cls[index == 1], real_label[index == 1]) #
# print(real_loss_c)
if torch.sum(torch.ones(real_label.size())[index==0]) > 0:
real_loss_c += forward_loss(real_cls[index == 0], real_label[index == 0],Q) #
optd_c.zero_grad()
real_loss_c.backward()
optd_c.step()
pbar.set_description(
'Loss: {:.6f}'.format(real_loss_c[0]))
torch.save(netd_c.state_dict(), os.path.join(opt.savingroot, opt.dataset,
str(opt.p1 * 100) + '%complementary/' + str(
opt.p1) + f'_chkpts/d_{epoch:03d}.pth'))
return step
def train_forward(args, model, device, loader, optimizer, epoch, T):
model.train()
train_loss = 0
correct = 0
for data, target in loader:
data, target = data.to(device), target.to(device)
optimizer.zero_grad()
output = model(data)
loss = forward_loss(output, target, T)
loss.backward()
optimizer.step()
train_loss += data.size(0) * loss.item()
pred = output.argmax(
dim=1, keepdim=True) # get the index of the max log-probability
correct += pred.eq(target.view_as(pred)).sum().item()
train_loss /= len(loader.dataset)
print(
'Epoch: {}/{}\nTraining loss: {:.4f}, Training accuracy: {}/{} ({:.2f}%)'
.format(epoch, args.epochs, train_loss, correct, len(loader.dataset),
100. * correct / len(loader.dataset)))
def train_c(epoch, netd_c, optd_c, loader, step, opt):
netd_c.train()
for _, (image_c, label) in enumerate(loader):
# plt.imshow(np.transpose((image[0].cpu().numpy()+1)/2,[1,2,0]))
# plt.show()
# print(image.max(),image.min())
index = label[:, 1]
index = Variable(index).cuda()
label = label[:, 0]
real_label = label.cuda()
real_loss_c = torch.zeros(1).cuda()
if sum(index == 1) + sum(index == 0) > 0:
real_input_c = Variable(image_c).cuda()
_, real_cls = netd_c(real_input_c)
if sum(index == 1) > 0:
real_loss_c += F.cross_entropy(real_cls[index == 1],
real_label[index == 1]) #
elif sum(index == 0) > 0:
real_loss_c += forward_loss(real_cls[index == 0],
real_label[index == 0]) #
optd_c.zero_grad()
real_loss_c.backward()
optd_c.step()
torch.save(
netd_c.state_dict(),
os.path.join(
opt.savingroot, opt.dataset,
str(opt.p1 * 100) + '%complementary/' + str(opt.p1) +
f'_chkpts/d_{epoch:03d}.pth'))
return step
def train_data_g(netd, netg, optd, epoch, step, opt, loader):
netg.eval()
netd.train()
for _, (image_g, image_c, label) in enumerate(loader):
# plt.imshow(np.transpose((image[0].cpu().numpy()+1)/2,[1,2,0]))
# plt.show()
# print(image.max(),image.min())
index = label[:, 1]
index = Variable(index).cuda()
label = label[:, 0]
real_label = label.cuda()
real_loss_c = torch.zeros(1).cuda()
if sum(index == 1) + sum(index == 0) > 0:
real_input_c = Variable(image_c).cuda()
_, real_cls = netd(real_input_c)
if sum(index == 1) > 0:
real_loss_c += F.cross_entropy(real_cls[index == 1],
real_label[index == 1]) #
elif sum(index == 0) > 0:
real_loss_c += forward_loss(real_cls[index == 0],
real_label[index == 0]) #
#######################
# fake input and label
#######################
noise = Variable(torch.Tensor(opt.batch_size,
opt.nz).normal_(0, 1)).cuda()
fake_label = Variable(torch.LongTensor(
opt.batch_size).random_(10)).cuda()
optd.zero_grad()
fake_input = netg(noise, fake_label)
# print(fake_input.min(),fake_input.max())
#
# img = np.transpose((fake_input[0].cpu().detach().numpy()+1)/2,[1,2,0])
# if img.shape[2] == 1:
# img = np.concatenate([img,img,img],axis=2)
# plt.imshow(img)
# plt.show()
# print(fake_label[0])
# time.sleep(1)
fake_pred, fake_cls = netd(fake_input.detach())
fake_loss_c = F.cross_entropy(fake_cls, fake_label) #
# if epoch >=80:
# fake_loss = fake_loss + cep(fake_cls, fake_label)
c_loss = fake_loss_c + real_loss_c
c_loss.backward()
optd.step()
log_value('c_f_loss', c_loss, step)
torch.save(
netd.state_dict(),
os.path.join(
opt.savingroot, opt.dataset,
str(opt.p1 * 100) + '%complementary/' + str(opt.p1) +
f'_chkpts_fake_data/d_{epoch:03d}.pth'))
return step
def train_data_g(netd,netg,optd,epoch,step,opt,loader,Q):
netg.eval()
requires_grad(netg, False)
netd.train()
for _, (image_c, label) in enumerate(loader):
# plt.imshow(np.transpose((image[0].cpu().numpy()+1)/2,[1,2,0]))
# plt.show()
# print(image.max(),image.min())
index = label[:, 1]
index = Variable(index).cuda()
label = label[:, 0]
real_label = label.cuda()
real_loss_c = torch.zeros(1).cuda()
if sum(index == 1) + sum(index == 0) > 0:
real_input_c = Variable(image_c).cuda()
_, real_cls = netd(real_input_c)
if sum(index == 1) > 0:
real_loss_c += F.cross_entropy(real_cls[index == 1], real_label[index == 1]) #
elif sum(index == 0) > 0:
real_loss_c += forward_loss(real_cls[index == 0], real_label[index == 0],Q=Q) #
#######################
# fake input and label
#######################
noise = torch.randn(opt.batch_size, opt.nz).cuda()
fake_label = torch.multinomial(
torch.ones(opt.num_class), opt.batch_size, replacement=True
).cuda()
optd.zero_grad()
fake_input = netg(noise,fake_label)
# print(fake_input.min(),fake_input.max())
#
# img = np.transpose((fake_input[0].cpu().detach().numpy()+1)/2,[1,2,0])
# plt.imshow(img)
# plt.show()
# print(fake_label[0])
# time.sleep(1)
fake_pred, fake_cls = netd(fake_input.detach())
fake_loss_c = F.cross_entropy(fake_cls,fake_label) #
# if epoch >=80:
# fake_loss = fake_loss + cep(fake_cls, fake_label)
c_loss = fake_loss_c+real_loss_c
c_loss.backward()
optd.step()
log_value('c_f_loss', c_loss, step)
torch.save(netd.state_dict(), os.path.join(opt.savingroot,opt.dataset,str(opt.p1 * 100) + '%complementary/' + str(opt.p1)+f'_chkpts_fake_data/Nd_{epoch:03d}.pth'))
return step
def train_c(epoch,
netd_c,
optd_c,
loader,
step,
opt,
co_data=torch.Tensor([]).cuda()):
data_iter = iter(loader)
iters = len(loader)
extra_iters = 0
if len(co_data) > 0:
if len(co_data[0]) % 128 == 0:
extra_iters = math.floor(len(co_data[0]) / 128)
else:
extra_iters = math.floor(len(co_data[0]) / 128) + 1
co_label = co_data[1]
co_datas = co_data[0]
netd_c.train()
i = 0
print('iters:', iters, 'extra_iters:', extra_iters, 'sum of both:',
iters + extra_iters)
while i < iters + extra_iters:
#for _, (image_c, label) in enumerate(loader):
# plt.imshow(np.transpose((image[0].cpu().numpy()+1)/2,[1,2,0]))
# plt.show()
# print(image.max(),image.min())
real_loss_c = torch.zeros(1).cuda()
if i < iters:
labeled_data = data_iter.next()
image_c, label = labeled_data
index = label[:, 1]
index = Variable(index).cuda()
label = label[:, 0]
real_label = label.cuda()
if sum(index == 1) + sum(index == 0) > 0:
real_input_c = Variable(image_c).cuda()
_, real_cls = netd_c(real_input_c)
if sum(index == 1) > 0:
real_loss_c += F.cross_entropy(real_cls[index == 1],
real_label[index == 1]) #
if sum(index == 0) > 0:
real_loss_c += forward_loss(real_cls[index == 0],
real_label[index == 0]) #
optd_c.zero_grad()
real_loss_c.backward()
optd_c.step()
i += 1
else:
if i != iters + extra_iters - 1:
co_labels = co_label[128 * (i - iters):(127 + 128 *
(i - iters)), 0]
real_input_c = Variable(
co_datas[128 * (i - iters):(127 + 128 *
(i - iters))]).cuda()
print(co_labels.size(), real_input_c.size())
_, real_cls = netd_c(real_input_c)
real_loss_c += F.cross_entropy(real_cls, co_labels.long())
else:
co_labels = co_label[128 * (i - iters):, 0]
print(co_labels, co_datas[128 * (i - iters):].size())
real_input_c = Variable(co_datas[128 * (i - iters):]).cuda()
_, real_cls = netd_c(real_input_c)
real_loss_c += F.cross_entropy(real_cls, co_labels.long())
optd_c.zero_grad()
real_loss_c.backward()
optd_c.step()
i += 1
torch.save(
netd_c.state_dict(),
os.path.join(
opt.savingroot, opt.dataset,
str(opt.p1 * 100) + '%complementary/' + str(opt.p1) +
'_chkpts/d_epoch{:03d}.pth'.format(epoch)))
return step
def co_train_c(epoch, netd_c1, optd_c1, netd_c2, optd_c2, loader,
unlabel_loader, step, opt):
netd_c1.train() # 将本层及子层的training设定为True
netd_c2.train()
min_dataloader = min(len(loader), len(unlabel_loader))
max_dataloader = max(len(loader), len(unlabel_loader))
data_iter = iter(loader)
unlabel_data_iter = iter(unlabel_loader)
i = 0
#for _, (image_g,image_c, label) in enumerate(loader):
# image_c:torch.size([128,1,32,32])
# label:torch.size([128,2])
while i < min_dataloader:
real_loss_c = torch.zeros(1).cuda()
labeled_data = data_iter.next() # labeled data (include 0,1 labels)
image_g, image_c, label = labeled_data
index = label[:, 1]
index = Variable(index).cuda()
label = label[:, 0]
real_label = label.cuda()
if sum(index == 1) + sum(index == 0) > 0:
real_input_c = Variable(image_c).cuda()
_, real_cls1 = netd_c1(
real_input_c) #real_cls:torch.size([128,10])
_, real_cls2 = netd_c2(real_input_c)
if sum(index == 1) > 0:
real_loss_c += F.cross_entropy(real_cls1[index == 1],
real_label[index == 1]) #
real_loss_c += F.cross_entropy(real_cls2[index == 1],
real_label[index == 1])
if i % 20 == 0:
print(real_loss_c)
if sum(index == 0) > 0: ### I have 'elif' changed to 'if' here
real_loss_c += forward_loss(real_cls1[index == 0],
real_label[index == 0]) #
real_loss_c += forward_loss(real_cls2[index == 0],
real_label[index == 0])
if i % 20 == 0:
print(real_loss_c)
unlabel_data = unlabel_data_iter.next() # unlabeled data (-1 label)
image_u, label_u = unlabel_data
unlabel_input_u = Variable(image_u).cuda()
_, unlabel_cls1 = netd_c1(
unlabel_input_u) #unlabel_cls:torch.size([128,10])
_, unlabel_cls2 = netd_c2(unlabel_input_u)
probt1 = F.softmax(unlabel_cls1, dim=1)
out1 = torch.log(probt1)
probt2 = F.softmax(unlabel_cls2, dim=1)
out2 = torch.log(probt2)
Qx = (out1 + out2) / 2
T = (probt1 + probt2) / 2
KLDiv = sum(sum((probt1.mul(out1 - Qx) + probt2.mul(out2 - Qx)) /
2)) / (len(probt1))
#KLDiv = sum(sum( probt1.mul(out1-out2) ))/(len(probt1))*0.5
#KLDiv = sum(sum(-T*Qx-( -probt1*out1 - probt2*out2 )/2))/(len(probt1))
if i % 20 == 0:
print(KLDiv)
real_loss_c = real_loss_c + KLDiv
#real_loss_c +=( F.kl_div((out1+out2)/2,probt1) + F.kl_div((out1+out2)/2,probt2 ) )/2
#real_loss_c +=( torch.nn.KLDivLoss(out1,(probt1+probt2)/2) + torch.nn.KLDivLoss(out2,(probt1+probt2)/2) )/2
optd_c1.zero_grad()
optd_c2.zero_grad()
real_loss_c.backward()
optd_c1.step()
optd_c2.step()
i += 1
torch.save(
netd_c1.state_dict(),
os.path.join(
opt.savingroot, opt.dataset,
str(opt.p1 * 100) + '%complementary/' + str(opt.p1) +
'_chkpts/d1_epoch{:03d}.pth'.format(epoch)))
torch.save(
netd_c2.state_dict(),
os.path.join(
opt.savingroot, opt.dataset,
str(opt.p1 * 100) + '%complementary/' + str(opt.p1) +
'_chkpts/d2_epoch{:03d}.pth'.format(epoch)))
return step