def evaluate(data, model, device, class_no):
model.eval()
with torch.no_grad():
#
f1 = 0
test_iou = 0
test_h_dist = 0
recall = 0
precision = 0
#
# for index in evaluate_index:
for j, (testimg, testlabel, testimgname) in enumerate(data):
# ===========================================================
# ===========================================================
testimg = testimg.to(device=device, dtype=torch.float32)
testlabel = testlabel.to(device=device, dtype=torch.float32)
testoutput = model(testimg)
if class_no == 2:
#
testoutput = torch.sigmoid(testoutput)
testoutput = (testoutput > 0.5).float()
#
else:
#
_, testoutput = torch.max(testoutput, dim=1)
#
# mean_iu_ = segmentation_scores(testlabel.cpu().detach().numpy(), testoutput.cpu().detach().numpy(), class_no)
mean_iu_ = intersectionAndUnion(testoutput.cpu().detach(), testlabel.cpu().detach(), class_no)
f1_, recall_, precision_ = f1_score(testlabel.cpu().detach().numpy(), testoutput.cpu().detach().numpy(), class_no)
f1 += f1_
test_iou += mean_iu_
recall += recall_
precision += precision_
# return test_iou / len(evaluate_index), f1 / len(evaluate_index), recall / len(evaluate_index), precision / len(evaluate_index)
return test_iou / (j + 1), f1 / (j + 1), recall / (j + 1), precision / (j + 1)
def trainSingleModel(model, model_name, num_epochs, learning_rate, datasettag,
train_dataset, train_batchsize, trainloader,
validateloader, testdata, reverse_mode, lr_schedule,
class_no):
# change log names
training_amount = len(train_dataset)
iteration_amount = training_amount // train_batchsize
iteration_amount = iteration_amount - 1
device = torch.device('cuda')
lr_str = str(learning_rate)
epoches_str = str(num_epochs)
save_model_name = model_name + '_' + datasettag + '_e' + epoches_str + '_lr' + lr_str
saved_information_path = './Results'
try:
os.mkdir(saved_information_path)
except OSError as exc:
if exc.errno != errno.EEXIST:
raise
pass
saved_information_path = saved_information_path + '/' + save_model_name
try:
os.mkdir(saved_information_path)
except OSError as exc:
if exc.errno != errno.EEXIST:
raise
pass
saved_model_path = saved_information_path + '/trained_models'
try:
os.mkdir(saved_model_path)
except OSError as exc:
if exc.errno != errno.EEXIST:
raise
pass
print('The current model is:')
print(save_model_name)
print('\n')
writer = SummaryWriter('./Results/Log_' + datasettag + '/' +
save_model_name)
model.to(device)
threshold = torch.tensor([0.5],
dtype=torch.float32,
device=device,
requires_grad=False)
upper = torch.tensor([1.0],
dtype=torch.float32,
device=device,
requires_grad=False)
lower = torch.tensor([0.0],
dtype=torch.float32,
device=device,
requires_grad=False)
optimizer = torch.optim.AdamW(model.parameters(),
lr=learning_rate,
betas=(0.9, 0.999),
eps=1e-8,
weight_decay=1e-5)
if lr_schedule is True:
# scheduler = lr_scheduler.ReduceLROnPlateau(optimizer, mode='max', factor=0.2, patience=10, threshold=0.001)
scheduler = lr_scheduler.MultiStepLR(
optimizer,
milestones=[num_epochs // 2, 3 * num_epochs // 4],
gamma=0.1)
start = timeit.default_timer()
for epoch in range(num_epochs):
model.train()
train_iou = []
train_loss = []
# j: index of iteration
for j, (images, labels, imagename) in enumerate(trainloader):
optimizer.zero_grad()
images = images.to(device=device, dtype=torch.float32)
if class_no == 2:
labels = labels.to(device=device, dtype=torch.float32)
else:
labels = labels.to(device=device, dtype=torch.long)
outputs = model(images)
if class_no == 2:
prob_outputs = torch.sigmoid(outputs)
loss = dice_loss(prob_outputs, labels)
class_outputs = torch.where(prob_outputs > threshold, upper,
lower)
else:
prob_outputs = torch.softmax(outputs, dim=1)
# loss = nn.CrossEntropyLoss(reduction='mean')(prob_outputs, labels)
loss = nn.CrossEntropyLoss(reduction='mean')(prob_outputs,
labels.squeeze(1))
_, class_outputs = torch.max(outputs, dim=1)
loss.backward()
optimizer.step()
mean_iu_, _, __ = segmentation_scores(labels, class_outputs,
class_no)
train_iou.append(mean_iu_)
train_loss.append(loss.item())
if lr_schedule is True:
# scheduler.step(validate_iou)
scheduler.step()
else:
pass
model.eval()
with torch.no_grad():
validate_iou = []
validate_f1 = []
validate_h_dist = []
for i, (val_images, val_label,
imagename) in enumerate(validateloader):
val_img = val_images.to(device=device, dtype=torch.float32)
if class_no == 2:
val_label = val_label.to(device=device,
dtype=torch.float32)
else:
val_label = val_label.to(device=device, dtype=torch.long)
assert torch.max(val_label) != 100.0
val_outputs = model(val_img)
if class_no == 2:
val_class_outputs = torch.sigmoid(val_outputs)
val_class_outputs = (val_class_outputs > 0.5).float()
else:
val_class_outputs = torch.softmax(val_outputs, dim=1)
_, val_class_outputs = torch.max(val_class_outputs, dim=1)
# b, c, h, w = val_label.size()
# val_class_outputs = val_class_outputs.reshape(b, c, h, w)
eval_mean_iu_, _, __ = segmentation_scores(
val_label, val_class_outputs, class_no)
eval_f1_, eval_recall_, eval_precision_, eTP, eTN, eFP, eFN, eP, eN = f1_score(
val_label, val_class_outputs, class_no)
validate_iou.append(eval_mean_iu_)
validate_f1.append(eval_f1_)
if (val_class_outputs == 1).sum() > 1 and (
val_label == 1).sum() > 1 and class_no == 2:
v_dist_ = hd95(val_class_outputs, val_label, class_no)
validate_h_dist.append(v_dist_)
print('Step [{}/{}], '
'Train loss: {:.4f}, '
'Train iou: {:.4f}, '
'val iou:{:.4f}, '.format(epoch + 1, num_epochs,
np.nanmean(train_loss),
np.nanmean(train_iou),
np.nanmean(validate_iou)))
writer.add_scalars(
'acc metrics', {
'train iou': np.nanmean(train_iou),
'val iou': np.nanmean(validate_iou),
'val f1': np.nanmean(validate_f1)
}, epoch + 1)
if epoch > num_epochs - 10:
save_model_name_full = saved_model_path + '/epoch' + str(epoch)
save_model_name_full = save_model_name_full + '.pt'
path_model = save_model_name_full
torch.save(model, path_model)
test(testdata,
saved_model_path,
device,
reverse_mode=reverse_mode,
class_no=class_no,
save_path=saved_model_path)
# save model
stop = timeit.default_timer()
print('Time: ', stop - start)
print('\nTraining finished and model saved\n')
return model
def test(testdata, models_path, device, reverse_mode, class_no, save_path):
all_models = glob.glob(os.path.join(models_path, '*.pt'))
# with torch.no_grad():
test_f1 = []
test_iou = []
test_h_dist = []
test_acc = []
test_w_acc = []
test_recall = []
test_precision = []
test_bf = []
test_iou_adv = []
test_h_dist_adv = []
for model in all_models:
model = torch.load(model)
model.eval()
for j, (testimg, testlabel, testname) in enumerate(testdata):
# validate batch size will be set up as 2
# testimg = torch.from_numpy(testimg).to(device=device, dtype=torch.float32)
# testlabel = torch.from_numpy(testlabel).to(device=device, dtype=torch.float32)
testimg = testimg.to(device=device, dtype=torch.float32)
if class_no == 2:
testlabel = testlabel.to(device=device, dtype=torch.float32)
else:
testlabel = testlabel.to(device=device, dtype=torch.long)
# b, c, h, w = testimg.size()
# testimg = testimg[:, 0, :, :].view(b, 1, h, w).contiguous()
# testlabel = testlabel[:, 0, :, :].view(b, 1, h, w).contiguous()
if torch.max(testlabel) == 255.:
testlabel = testlabel / 255.
testimg.requires_grad = True
threshold = torch.tensor([0.5],
dtype=torch.float32,
device=device,
requires_grad=False)
upper = torch.tensor([1.0],
dtype=torch.float32,
device=device,
requires_grad=False)
lower = torch.tensor([0.0],
dtype=torch.float32,
device=device,
requires_grad=False)
# c, h, w = testimg.size()
# testimg = testimg.expand(1, c, h, w)
testoutput = model(testimg)
if class_no == 2:
prob_testoutput = torch.sigmoid(testoutput)
testoutput = (prob_testoutput > 0.5).float()
else:
prob_testoutput = torch.softmax(testoutput, dim=1)
_, testoutput = torch.max(prob_testoutput, dim=1)
# attack testing data:
if class_no == 2:
loss = dice_loss(prob_testoutput, testlabel)
else:
loss = nn.CrossEntropyLoss(reduction='mean')(
prob_testoutput, testlabel.squeeze(1))
model.zero_grad()
loss.backward()
data_grad = testimg.grad.data
perturbed_data = fgsm_attack(testimg, 0.2, data_grad)
output_attack = model(perturbed_data)
if class_no == 2:
output_attack = torch.sigmoid(output_attack)
output_attack = (output_attack > 0.5).float()
else:
output_attack = torch.softmax(output_attack, dim=1)
_, output_attack = torch.max(output_attack, dim=1)
mean_iu_, acc_, w_acc_ = segmentation_scores(
testlabel, testoutput, class_no)
test_iou.append(mean_iu_)
test_acc.append(acc_)
test_w_acc.append(w_acc_)
mean_iu_adv_, _, __ = segmentation_scores(testlabel, output_attack,
class_no)
test_iou_adv.append(mean_iu_adv_)
if (testoutput == 1).sum() > 1 and (
testlabel == 1).sum() > 1 and class_no == 2:
h_dis95_ = hd95(testoutput, testlabel, class_no)
test_h_dist.append(h_dis95_)
if (output_attack == 1).sum() > 1 and (
testlabel == 1).sum() > 1 and class_no == 2:
h_dis95_attack_ = hd95(output_attack, testlabel, class_no)
test_h_dist_adv.append(h_dis95_attack_)
f1_, recall_, precision_, TP, TN, FP, FN, P, N = f1_score(
testlabel, testoutput, class_no)
bf_ = 2 * precision_ * recall_ / (recall_ + precision_)
test_f1.append(f1_)
test_recall.append(recall_)
test_precision.append(precision_)
test_bf.append(bf_)
prediction_map_path = save_path + '/Test'
try:
os.mkdir(prediction_map_path)
except OSError as exc:
if exc.errno != errno.EEXIST:
raise
pass
result_dictionary = {
'Test IoU mean': str(np.mean(test_iou)),
'Test IoU std': str(np.std(test_iou)),
'Test Acc mean': str(np.mean(test_acc)),
'Test Acc std': str(np.std(test_acc)),
'Test W ACC mean': str(np.mean(test_w_acc)),
'Test W ACC std': str(np.std(test_w_acc)),
'Test BF mean': str(np.mean(test_bf)),
'Test BF std': str(np.std(test_bf)),
'Test f1 mean': str(np.mean(test_f1)),
'Test f1 std': str(np.std(test_f1)),
'Test H-dist mean': str(np.mean(test_h_dist)),
'Test H-dist std': str(np.std(test_h_dist)),
'Test precision mean': str(np.mean(test_precision)),
'Test precision std': str(np.std(test_precision)),
'Test recall mean': str(np.mean(test_recall)),
'Test recall std': str(np.std(test_recall)),
'Test IoU attack mean': str(np.mean(test_iou_adv)),
'Test IoU attack std': str(np.std(test_iou_adv)),
'Test H-dist attack mean': str(np.mean(test_h_dist_adv)),
'Test H-dist attack std': str(np.std(test_h_dist_adv)),
}
ff_path = prediction_map_path + '/test_result_data.txt'
ff = open(ff_path, 'w')
ff.write(str(result_dictionary))
ff.close()
print('Test h-dist: {:.4f}, '
'Test iou: {:.4f}, '.format(np.mean(test_h_dist), np.mean(test_iou)))
def evaluate(evaluatedata, model, device, reverse_mode, class_no):
model.eval()
f1 = 0
test_iou = 0
test_h_dist = 0
recall = 0
precision = 0
FPs_Ns = 0
FNs_Ps = 0
FPs_Ps = 0
FNs_Ns = 0
TPs = 0
TNs = 0
FNs = 0
FPs = 0
Ps = 0
Ns = 0
test_iou_attack = 0
test_h_dist_attack = 0
effective_h = 0
effective_h_attack = 0
for j, (testimg, testlabel, testname) in enumerate(evaluatedata):
# validate batch size will be set up as 2
# j will be close enough to the
# testimg = testimg.to(device=device, dtype=torch.float32)
testimg = testimg.to(device=device, dtype=torch.float32)
testlabel = testlabel.to(device=device, dtype=torch.float32)
# b, c, h, w = testimg.size()
# testimg = testimg[:, 0, :, :].view(b, 1, h, w).contiguous()
# testlabel = testlabel[:, 0, :, :].view(b, 1, h, w).contiguous()
# if torch.max(testlabel) == 255.:
# testlabel = testlabel / 255.
testimg.requires_grad = True
# testlabel = testlabel.to(device=device, dtype=torch.float32)
threshold = torch.tensor([0.5],
dtype=torch.float32,
device=device,
requires_grad=False)
upper = torch.tensor([1.0],
dtype=torch.float32,
device=device,
requires_grad=False)
lower = torch.tensor([0.0],
dtype=torch.float32,
device=device,
requires_grad=False)
testoutput = model(testimg)
prob_testoutput = torch.sigmoid(testoutput)
# attack testing data:
loss = dice_loss(prob_testoutput, testlabel)
model.zero_grad()
loss.backward()
data_grad = testimg.grad.data
perturbed_data = fgsm_attack(testimg, 0.2, data_grad)
output_attack = model(perturbed_data)
output_attack = torch.sigmoid(output_attack)
if reverse_mode is True:
testoutput = torch.where(prob_testoutput < threshold, upper, lower)
output_attack = torch.where(output_attack < threshold, upper,
lower)
else:
testoutput = torch.where(prob_testoutput > threshold, upper, lower)
output_attack = torch.where(output_attack > threshold, upper,
lower)
mean_iu_, _, __ = segmentation_scores(testlabel, testoutput, class_no)
mean_iu_attack_, _, __ = segmentation_scores(testlabel, output_attack,
class_no)
if (testoutput == 1).sum() > 1 and (testlabel == 1).sum() > 1:
h_dis95_ = hd95(testoutput, testlabel, class_no)
test_h_dist += h_dis95_
effective_h = effective_h + 1
if (output_attack == 1).sum() > 1 and (testlabel == 1).sum() > 1:
h_dis95_attack_ = hd95(output_attack, testlabel, class_no)
effective_h_attack = effective_h_attack + 1
test_h_dist_attack += h_dis95_attack_
f1_, recall_, precision_, TP, TN, FP, FN, P, N = f1_score(
testlabel, testoutput, class_no)
f1 += f1_
test_iou += mean_iu_
recall += recall_
precision += precision_
TPs += TP
TNs += TN
FPs += FP
FNs += FN
Ps += P
Ns += N
FNs_Ps += (FN + 1e-10) / (P + 1e-10)
FPs_Ns += (FP + 1e-10) / (N + 1e-10)
FNs_Ns += (FN + 1e-10) / (N + 1e-10)
FPs_Ps += (FP + 1e-10) / (P + 1e-10)
test_iou_attack += mean_iu_attack_
return test_iou / (j + 1), f1 / (j + 1), recall / (j + 1), precision / (
j +
1), FPs_Ns / (j + 1), FPs_Ps / (j + 1), FNs_Ns / (j + 1), FNs_Ps / (
j + 1), FPs / (j + 1), FNs / (j + 1), TPs / (j + 1), TNs / (
j + 1), Ps / (j + 1), Ns / (j + 1), test_h_dist / (
effective_h + 1), test_iou_attack / (
j + 1), test_h_dist_attack / (effective_h_attack + 1)
def test1(data_1, model, device, class_no, save_location):
model.eval()
data_1_testoutputs = []
with torch.no_grad():
f1_1 = 0
test_iou_1 = 0
# test_h_dist_1 = 0
recall_1 = 0
precision_1 = 0
mse_1 = 0
# ==============================================
evaluate_index_all_1 = range(0, len(data_1) - 1)
#
# ==============================================
# evaluate_index_all_2 = range(0, len(data_2) - 1)
#
for j, (testimg, testlabel, testimgname) in enumerate(data_1):
# extract a few random indexs every time in a range of the data
# ========================================================================
# ========================================================================
testimg = torch.from_numpy(testimg).to(device=device, dtype=torch.float32)
testlabel = torch.from_numpy(testlabel).to(device=device, dtype=torch.float32)
c, h, w = testimg.size()
testimg = testimg.expand(1, c, h, w)
testoutput_original = model(testimg)
if class_no == 2:
testoutput = torch.sigmoid(testoutput_original.view(1, h, w))
testoutput = (testoutput > 0.5).float()
data_1_testoutputs.append(testoutput)
#
else:
#
_, testoutput = torch.max(testoutput_original, dim=1)
#
mean_iu_ = intersectionAndUnion(testoutput.cpu().detach(), testlabel.cpu().detach(), class_no)
f1_, recall_, precision_ = f1_score(testlabel.cpu().detach().numpy(), testoutput.cpu().detach().numpy(), class_no)
mse_ = (np.square(testlabel.cpu().detach().numpy() - testoutput.cpu().detach().numpy())).mean()
f1_1 += f1_
test_iou_1 += mean_iu_
recall_1 += recall_
precision_1 += precision_
mse_1 += mse_
#
# # Plotting segmentation:
# testoutput_original = np.asarray(testoutput_original.cpu().detach().numpy(), dtype=np.uint8)
# testoutput_original = np.squeeze(testoutput_original, axis=0)
# testoutput_original = np.repeat(testoutput_original[:, :, np.newaxis], 3, axis=2)
# #
# if class_no == 2:
# segmentation_map = np.zeros((h, w, 3), dtype=np.uint8)
# #
# segmentation_map[:, :, 0][np.logical_and(testoutput_original[:, :, 0] == 1, testoutput_original[:, :, 1] == 1, testoutput_original[:, :, 2] == 1)] = 255
# segmentation_map[:, :, 1][np.logical_and(testoutput_original[:, :, 0] == 1, testoutput_original[:, :, 1] == 1, testoutput_original[:, :, 2] == 1)] = 0
# segmentation_map[:, :, 2][np.logical_and(testoutput_original[:, :, 0] == 1, testoutput_original[:, :, 1] == 1, testoutput_original[:, :, 2] == 1)] = 0
# #
# else:
# segmentation_map = np.zeros((h, w, 3), dtype=np.uint8)
# if class_no == 4:
# # multi class for brats 2018
# segmentation_map[:, :, 0][np.logical_and(testoutput_original[:, :, 0] == 1, testoutput_original[:, :, 1] == 1, testoutput_original[:, :, 2] == 1)] = 255
# segmentation_map[:, :, 1][np.logical_and(testoutput_original[:, :, 0] == 1, testoutput_original[:, :, 1] == 1, testoutput_original[:, :, 2] == 1)] = 0
# segmentation_map[:, :, 2][np.logical_and(testoutput_original[:, :, 0] == 1, testoutput_original[:, :, 1] == 1, testoutput_original[:, :, 2] == 1)] = 0
# #
# segmentation_map[:, :, 0][np.logical_and(testoutput_original[:, :, 0] == 2, testoutput_original[:, :, 1] == 2, testoutput_original[:, :, 2] == 2)] = 0
# segmentation_map[:, :, 1][np.logical_and(testoutput_original[:, :, 0] == 2, testoutput_original[:, :, 1] == 2, testoutput_original[:, :, 2] == 2)] = 255
# segmentation_map[:, :, 2][np.logical_and(testoutput_original[:, :, 0] == 2, testoutput_original[:, :, 1] == 2, testoutput_original[:, :, 2] == 2)] = 0
# #
# segmentation_map[:, :, 0][np.logical_and(testoutput_original[:, :, 0] == 3, testoutput_original[:, :, 1] == 3, testoutput_original[:, :, 2] == 3)] = 0
# segmentation_map[:, :, 1][np.logical_and(testoutput_original[:, :, 0] == 3, testoutput_original[:, :, 1] == 3, testoutput_original[:, :, 2] == 3)] = 0
# segmentation_map[:, :, 2][np.logical_and(testoutput_original[:, :, 0] == 3, testoutput_original[:, :, 1] == 3, testoutput_original[:, :, 2] == 3)] = 255
# #
# elif class_no == 8:
# # multi class for cityscapes
# segmentation_map[:, :, 0][np.logical_and(testoutput_original[:, :, 0] == 0, testoutput_original[:, :, 1] == 0, testoutput_original[:, :, 2] == 0)] = 255
# segmentation_map[:, :, 1][np.logical_and(testoutput_original[:, :, 0] == 0, testoutput_original[:, :, 1] == 0, testoutput_original[:, :, 2] == 0)] = 0
# segmentation_map[:, :, 2][np.logical_and(testoutput_original[:, :, 0] == 0, testoutput_original[:, :, 1] == 0, testoutput_original[:, :, 2] == 0)] = 0
# #
# segmentation_map[:, :, 0][np.logical_and(testoutput_original[:, :, 0] == 1, testoutput_original[:, :, 1] == 1, testoutput_original[:, :, 2] == 1)] = 0
# segmentation_map[:, :, 1][np.logical_and(testoutput_original[:, :, 0] == 1, testoutput_original[:, :, 1] == 1, testoutput_original[:, :, 2] == 1)] = 255
# segmentation_map[:, :, 2][np.logical_and(testoutput_original[:, :, 0] == 1, testoutput_original[:, :, 1] == 1, testoutput_original[:, :, 2] == 1)] = 0
# #
# segmentation_map[:, :, 0][np.logical_and(testoutput_original[:, :, 0] == 2, testoutput_original[:, :, 1] == 2, testoutput_original[:, :, 2] == 2)] = 0
# segmentation_map[:, :, 1][np.logical_and(testoutput_original[:, :, 0] == 2, testoutput_original[:, :, 1] == 2, testoutput_original[:, :, 2] == 2)] = 0
# segmentation_map[:, :, 2][np.logical_and(testoutput_original[:, :, 0] == 2, testoutput_original[:, :, 1] == 2, testoutput_original[:, :, 2] == 2)] = 255
# #
# segmentation_map[:, :, 0][np.logical_and(testoutput_original[:, :, 0] == 3, testoutput_original[:, :, 1] == 3, testoutput_original[:, :, 2] == 3)] = 255
# segmentation_map[:, :, 1][np.logical_and(testoutput_original[:, :, 0] == 3, testoutput_original[:, :, 1] == 3, testoutput_original[:, :, 2] == 3)] = 255
# segmentation_map[:, :, 2][np.logical_and(testoutput_original[:, :, 0] == 3, testoutput_original[:, :, 1] == 3, testoutput_original[:, :, 2] == 3)] = 0
# #
# segmentation_map[:, :, 0][np.logical_and(testoutput_original[:, :, 0] == 4, testoutput_original[:, :, 1] == 4, testoutput_original[:, :, 2] == 4)] = 153
# segmentation_map[:, :, 1][np.logical_and(testoutput_original[:, :, 0] == 4, testoutput_original[:, :, 1] == 4, testoutput_original[:, :, 2] == 4)] = 51
# segmentation_map[:, :, 2][np.logical_and(testoutput_original[:, :, 0] == 4, testoutput_original[:, :, 1] == 4, testoutput_original[:, :, 2] == 4)] = 255
# #
# segmentation_map[:, :, 0][np.logical_and(testoutput_original[:, :, 0] == 5, testoutput_original[:, :, 1] == 5, testoutput_original[:, :, 2] == 5)] = 255
# segmentation_map[:, :, 1][np.logical_and(testoutput_original[:, :, 0] == 5, testoutput_original[:, :, 1] == 5, testoutput_original[:, :, 2] == 5)] = 102
# segmentation_map[:, :, 2][np.logical_and(testoutput_original[:, :, 0] == 5, testoutput_original[:, :, 1] == 5, testoutput_original[:, :, 2] == 5)] = 178
# #
# segmentation_map[:, :, 0][np.logical_and(testoutput_original[:, :, 0] == 6, testoutput_original[:, :, 1] == 6, testoutput_original[:, :, 2] == 6)] = 102
# segmentation_map[:, :, 1][np.logical_and(testoutput_original[:, :, 0] == 6, testoutput_original[:, :, 1] == 6, testoutput_original[:, :, 2] == 6)] = 255
# segmentation_map[:, :, 2][np.logical_and(testoutput_original[:, :, 0] == 6, testoutput_original[:, :, 1] == 6, testoutput_original[:, :, 2] == 6)] = 102
# #
# prediction_name = 'seg_' + test_imagename + '.png'
# full_error_map_name = os.path.join(prediction_map_path, prediction_name)
# imageio.imsave(full_error_map_name, segmentation_map)
#
prediction_map_path = save_location + '/' + 'Results_map'
#
try:
os.mkdir(prediction_map_path)
except OSError as exc:
if exc.errno != errno.EEXIST:
raise
pass
# save numerical results:
result_dictionary = {'Test IoU data 1': str(test_iou_1 / len(evaluate_index_all_1)),
'Test f1 data 1': str(f1_1 / len(evaluate_index_all_1)),
'Test recall data 1': str(recall_1 / len(evaluate_index_all_1)),
'Test Precision data 1': str(precision_1 / len(evaluate_index_all_1)),
'Test MSE data 1': str(mse_1 / len(evaluate_index_all_1))
}
ff_path = prediction_map_path + '/test_result_data.txt'
ff = open(ff_path, 'w')
ff.write(str(result_dictionary))
ff.close()
return test_iou_1 / len(evaluate_index_all_1), f1_1 / len(evaluate_index_all_1), recall_1 / len(evaluate_index_all_1), precision_1 / len(evaluate_index_all_1), mse_1 / len(evaluate_index_all_1), \
data_1_testoutputs
def trainSingleModel(model,
model_name,
num_epochs,
learning_rate,
datasettag,
train_dataset,
train_batchsize,
trainloader,
validateloader,
testdata,
reverse_mode,
lr_schedule,
class_no):
# change log names
training_amount = len(train_dataset)
iteration_amount = training_amount // train_batchsize
iteration_amount = iteration_amount - 1
device = torch.device('cuda')
lr_str = str(learning_rate)
epoches_str = str(num_epochs)
save_model_name = model_name + '_' + datasettag + '_e' + epoches_str + '_lr' + lr_str
saved_information_path = './Results'
try:
os.mkdir(saved_information_path)
except OSError as exc:
if exc.errno != errno.EEXIST:
raise
pass
saved_information_path = saved_information_path + '/' + save_model_name
try:
os.mkdir(saved_information_path)
except OSError as exc:
if exc.errno != errno.EEXIST:
raise
pass
saved_model_path = saved_information_path + '/trained_models'
try:
os.mkdir(saved_model_path)
except OSError as exc:
if exc.errno != errno.EEXIST:
raise
pass
print('The current model is:')
print(save_model_name)
print('\n')
writer = SummaryWriter('./Results/Log_' + datasettag + '/' + save_model_name)
model.to(device)
threshold = torch.tensor([0.5], dtype=torch.float32, device=device, requires_grad=False)
upper = torch.tensor([1.0], dtype=torch.float32, device=device, requires_grad=False)
lower = torch.tensor([0.0], dtype=torch.float32, device=device, requires_grad=False)
optimizer = torch.optim.AdamW(model.parameters(), lr=learning_rate, betas=(0.9, 0.999), eps=1e-8, weight_decay=1e-5)
if lr_schedule is True:
# scheduler = lr_scheduler.ReduceLROnPlateau(optimizer, mode='max', factor=0.2, patience=10, threshold=0.001)
scheduler = lr_scheduler.MultiStepLR(optimizer, milestones=[num_epochs // 2, 3*num_epochs // 4], gamma=0.1)
start = timeit.default_timer()
for epoch in range(num_epochs):
model.train()
h_dists = 0
f1 = 0
accuracy_iou = 0
running_loss = 0
recall = 0
precision = 0
t_FPs_Ns = 0
t_FPs_Ps = 0
t_FNs_Ns = 0
t_FNs_Ps = 0
t_FPs = 0
t_FNs = 0
t_TPs = 0
t_TNs = 0
t_Ps = 0
t_Ns = 0
effective_h = 0
# j: index of iteration
for j, (images, labels, imagename) in enumerate(trainloader):
# check training data:
# image = images[0, :, :, :].squeeze().detach().cpu().numpy()
# label = labels[0, :, :, :].squeeze().detach().cpu().numpy()
# image = np.transpose(image, (1, 2, 0))
# label = np.expand_dims(label, axis=2)
# label = np.concatenate((label, label, label), axis=2)
# plt.imshow(0.5*image + 0.5*label)
# plt.show()
optimizer.zero_grad()
images = images.to(device=device, dtype=torch.float32)
labels = labels.to(device=device, dtype=torch.float32)
images.requires_grad = True
if reverse_mode is True:
inverse_labels = torch.ones_like(labels)
inverse_labels = inverse_labels.to(device=device, dtype=torch.float32)
inverse_labels = inverse_labels - labels
else:
pass
outputs = model(images)
prob_outputs = torch.sigmoid(outputs)
if reverse_mode is True:
loss = dice_loss(prob_outputs, inverse_labels)
else:
loss = dice_loss(prob_outputs, labels)
loss.backward()
optimizer.step()
# The taks of binary segmentation is too easy, to compensate the simplicity of the task,
# we add adversarial noises in the testing images:
data_grad = images.grad.data
perturbed_data = fgsm_attack(images, 0.2, data_grad)
prob_outputs = model(perturbed_data)
prob_outputs = torch.sigmoid(prob_outputs)
if reverse_mode is True:
class_outputs = torch.where(prob_outputs < threshold, upper, lower)
else:
class_outputs = torch.where(prob_outputs > threshold, upper, lower)
if class_no == 2:
# hasudorff distance is for binary
if (class_outputs == 1).sum() > 1 and (labels == 1).sum() > 1:
dist_ = hd95(class_outputs, labels, class_no)
h_dists += dist_
effective_h = effective_h + 1
else:
pass
else:
pass
mean_iu_ = segmentation_scores(labels, class_outputs, class_no)
f1_, recall_, precision_, TPs_, TNs_, FPs_, FNs_, Ps_, Ns_ = f1_score(labels, class_outputs, class_no)
running_loss += loss
f1 += f1_
accuracy_iou += mean_iu_
recall += recall_
precision += precision_
t_TPs += TPs_
t_TNs += TNs_
t_FPs += FPs_
t_FNs += FNs_
t_Ps += Ps_
t_Ns += Ns_
t_FNs_Ps += (FNs_ + 1e-8) / (Ps_ + 1e-8)
t_FPs_Ns += (FPs_ + 1e-8) / (Ns_ + 1e-8)
t_FNs_Ns += (FNs_ + 1e-8) / (Ns_ + 1e-8)
t_FPs_Ps += (FPs_ + 1e-8) / (Ps_ + 1e-8)
if (j + 1) % iteration_amount == 0:
validate_iou, validate_f1, validate_recall, validate_precision, v_FPs_Ns, v_FPs_Ps, v_FNs_Ns, v_FNs_Ps, v_FPs, v_FNs, v_TPs, v_TNs, v_Ps, v_Ns, v_h_dist = evaluate(validateloader, model, device, reverse_mode=reverse_mode, class_no=class_no)
print(
'Step [{}/{}], Train loss: {:.4f}, '
'Train iou: {:.4f}, '
'Train h-dist:{:.4f}, '
'Val iou: {:.4f},'
'Val h-dist: {:.4f}'.format(epoch + 1, num_epochs,
running_loss / (j + 1),
accuracy_iou / (j + 1),
h_dists / (effective_h + 1),
validate_iou,
v_h_dist))
# # # ================================================================== #
# # # TensorboardX Logging #
# # # # ================================================================ #
writer.add_scalars('acc metrics', {'train iou': accuracy_iou / (j+1),
'train hausdorff dist': h_dists / (effective_h+1),
'val iou': validate_iou,
'val hasudorff distance': v_h_dist,
'loss': running_loss / (j+1)}, epoch + 1)
writer.add_scalars('train confusion matrices analysis', {'train FPs/Ns': t_FPs_Ns / (j+1),
'train FNs/Ps': t_FNs_Ps / (j+1),
'train FPs/Ps': t_FPs_Ps / (j+1),
'train FNs/Ns': t_FNs_Ns / (j+1),
'train FNs': t_FNs / (j+1),
'train FPs': t_FPs / (j+1),
'train TNs': t_TNs / (j+1),
'train TPs': t_TPs / (j+1),
'train Ns': t_Ns / (j+1),
'train Ps': t_Ps / (j+1),
'train imbalance': t_Ps / (t_Ps + t_Ns)}, epoch + 1)
writer.add_scalars('val confusion matrices analysis', {'val FPs/Ns': v_FPs_Ns,
'val FNs/Ps': v_FNs_Ps,
'val FPs/Ps': v_FPs_Ps,
'val FNs/Ns': v_FNs_Ns,
'val FNs': v_FNs,
'val FPs': v_FPs,
'val TNs': v_TNs,
'val TPs': v_TPs,
'val Ns': v_Ns,
'val Ps': v_Ps,
'val imbalance': v_Ps / (v_Ps + v_Ns)}, epoch + 1)
else:
pass
# A learning rate schedule plan for fn attention:
# we ramp-up linearly inside of each iteration
# without the warm-up, it is hard to train sometimes
if 'fn' in model_name or 'FN' in model_name:
if reverse_mode is True:
if epoch < 10:
for param_group in optimizer.param_groups:
param_group['lr'] = learning_rate * (j / len(trainloader))
else:
pass
else:
pass
else:
pass
if lr_schedule is True:
scheduler.step()
else:
pass
# save models at last 10 epochs
if epoch >= (num_epochs - 10):
save_model_name_full = saved_model_path + '/' + save_model_name + '_epoch' + str(epoch) + '.pt'
path_model = save_model_name_full
torch.save(model, path_model)
# Test on all models and average them:
test(testdata,
saved_model_path,
device,
reverse_mode=reverse_mode,
class_no=class_no,
save_path=saved_information_path)
# save model
stop = timeit.default_timer()
print('Time: ', stop - start)
print('\n')
print('\nTraining finished and model saved\n')
return model
def test(
testdata,
models_path,
device,
reverse_mode,
class_no,
save_path):
all_models = glob.glob(os.path.join(models_path, '*.pt'))
test_f1 = []
test_iou = []
test_h_dist = []
test_recall = []
test_precision = []
test_iou_adv = []
test_h_dist_adv = []
for model in all_models:
model = torch.load(model)
model.eval()
for j, (testimg, testlabel, testname) in enumerate(testdata):
# validate batch size will be set up as 2
# testimg = torch.from_numpy(testimg).to(device=device, dtype=torch.float32)
# testlabel = torch.from_numpy(testlabel).to(device=device, dtype=torch.float32)
testimg = testimg.to(device=device, dtype=torch.float32)
testimg.requires_grad = True
testlabel = testlabel.to(device=device, dtype=torch.float32)
threshold = torch.tensor([0.5], dtype=torch.float32, device=device, requires_grad=False)
upper = torch.tensor([1.0], dtype=torch.float32, device=device, requires_grad=False)
lower = torch.tensor([0.0], dtype=torch.float32, device=device, requires_grad=False)
# c, h, w = testimg.size()
# testimg = testimg.expand(1, c, h, w)
testoutput = model(testimg)
# (todo) add for multi-class
prob_testoutput = torch.sigmoid(testoutput)
if class_no == 2:
if reverse_mode is True:
testoutput = torch.where(prob_testoutput < threshold, upper, lower)
else:
testoutput = torch.where(prob_testoutput > threshold, upper, lower)
# metrics before attack:
mean_iu_ = segmentation_scores(testlabel, testoutput, class_no)
test_iou.append(mean_iu_)
if (testoutput == 1).sum() > 1 and (testlabel == 1).sum() > 1:
h_dis95_ = hd95(testoutput, testlabel, class_no)
test_h_dist.append(h_dis95_)
f1_, recall_, precision_, TP, TN, FP, FN, P, N = f1_score(testlabel, testoutput, class_no)
test_f1.append(f1_)
test_recall.append(recall_)
test_precision.append(precision_)
# attack testing data:
loss = dice_loss(prob_testoutput, testlabel)
model.zero_grad()
loss.backward()
data_grad = testimg.grad.data
perturbed_data = fgsm_attack(testimg, 0.2, data_grad)
prob_testoutput_adv = model(perturbed_data)
prob_testoutput_adv = torch.sigmoid(prob_testoutput_adv)
if class_no == 2:
if reverse_mode is True:
testoutput_adv = torch.where(prob_testoutput_adv < threshold, upper, lower)
else:
testoutput_adv = torch.where(prob_testoutput_adv > threshold, upper, lower)
mean_iu_adv_ = segmentation_scores(testlabel, testoutput_adv, class_no)
test_iou_adv.append(mean_iu_adv_)
if (testoutput_adv == 1).sum() > 1 and (testlabel == 1).sum() > 1:
h_dis95_adv_ = hd95(testoutput_adv, testlabel, class_no)
test_h_dist_adv.append(h_dis95_adv_)
# store the test metrics
prediction_map_path = save_path + '/Test_result'
try:
os.mkdir(prediction_map_path)
except OSError as exc:
if exc.errno != errno.EEXIST:
raise
pass
# save numerical results:
result_dictionary = {
'Test IoU mean': str(np.mean(test_iou)),
'Test IoU std': str(np.std(test_iou)),
'Test f1 mean': str(np.mean(test_f1)),
'Test f1 std': str(np.std(test_f1)),
'Test H-dist mean': str(np.mean(test_h_dist)),
'Test H-dist std': str(np.std(test_h_dist)),
'Test precision mean': str(np.mean(test_precision)),
'Test precision std': str(np.std(test_precision)),
'Test recall mean': str(np.mean(test_recall)),
'Test recall std': str(np.std(test_recall)),
'Test IoU attack mean': str(np.mean(test_iou_adv)),
'Test IoU attack std': str(np.std(test_iou_adv)),
'Test H-dist attack mean': str(np.mean(test_h_dist_adv)),
'Test H-dist attack std': str(np.std(test_h_dist_adv)),
}
ff_path = prediction_map_path + '/test_results.txt'
ff = open(ff_path, 'w')
ff.write(str(result_dictionary))
ff.close()
print(
'Test h-dist: {:.4f}, '
'Val iou: {:.4f}, '.format(np.mean(test_h_dist), np.mean(test_iou)))