def test_ssim_reduction_and_full(reduction: str, full: bool, expectation: Any,
prediction: torch.Tensor,
target: torch.Tensor, device: str) -> None:
prediction = prediction.to(device)
target = target.to(device)
with expectation:
ssim(prediction, target, data_range=1., reduction=reduction, full=full)
def test_ssim_fails_for_incorrect_data_range(x: torch.Tensor, y: torch.Tensor,
device: str) -> None:
# Scale to [0, 255]
x_scaled = (x * 255).type(torch.uint8)
y_scaled = (y * 255).type(torch.uint8)
with pytest.raises(AssertionError):
ssim(x_scaled.to(device), y_scaled.to(device), data_range=1.0)
def test_ssim_simmular_to_matlab_implementation():
# Greyscale images
goldhill = torch.tensor(imread('tests/assets/goldhill.gif'))[None, None,
...]
goldhill_jpeg = torch.tensor(
imread('tests/assets/goldhill_jpeg.gif'))[None, None, ...]
score = ssim(goldhill_jpeg, goldhill, data_range=255, reduction='none')
# Output of http://www.cns.nyu.edu/~lcv/ssim/ssim.m
score_baseline = torch.tensor(0.8202)
assert torch.isclose(score, score_baseline, atol=1e-4), \
f'Expected PyTorch score to be equal to MATLAB prediction. Got {score} and {score_baseline}'
# RGB images
I01 = torch.tensor(imread('tests/assets/I01.BMP')).permute(2, 0, 1)[None,
...]
i1_01_5 = torch.tensor(imread('tests/assets/i01_01_5.bmp')).permute(
2, 0, 1)[None, ...]
score = ssim(i1_01_5, I01, data_range=255, reduction='none')
# Output of http://www.cns.nyu.edu/~lcv/ssim/ssim.m
# score_baseline = torch.tensor(0.7820)
score_baseline = torch.tensor(0.7842)
assert torch.isclose(score, score_baseline, atol=1e-2), \
f'Expected PyTorch score to be equal to MATLAB prediction. Got {score} and {score_baseline}'
def test_ssim_symmetry(x_y_4d_5d, device: str) -> None:
x = x_y_4d_5d[0].to(device)
y = x_y_4d_5d[1].to(device)
measure = ssim(x, y, data_range=1., reduction='none')
reverse_measure = ssim(y, x, data_range=1., reduction='none')
assert torch.allclose(measure, reverse_measure), f'Expect: SSIM(a, b) == SSIM(b, a), ' \
f'got {measure} != {reverse_measure}'
def test_ssim_reduction(x: torch.Tensor, y: torch.Tensor, device: str) -> None:
for mode in ['mean', 'sum', 'none']:
ssim(x.to(device), y.to(device), reduction=mode)
for mode in [None, 'n', 2]:
with pytest.raises(KeyError):
ssim(x.to(device), y.to(device), reduction=mode)
def test_ssim_reduction(prediction: torch.Tensor, target: torch.Tensor,
device: str) -> None:
for mode in ['mean', 'sum', 'none']:
ssim(prediction.to(device), target.to(device), reduction=mode)
for mode in [None, 'n', 2]:
with pytest.raises(KeyError):
ssim(prediction.to(device), target.to(device), reduction=mode)
def test_ssim_symmetry(prediction_target_4d_5d: Tuple[torch.Tensor,
torch.Tensor],
device: str) -> None:
prediction = prediction_target_4d_5d[0].to(device)
target = prediction_target_4d_5d[1].to(device)
measure = ssim(prediction, target, data_range=1., reduction='none')
reverse_measure = ssim(target, prediction, data_range=1., reduction='none')
assert torch.allclose(measure, reverse_measure), f'Expect: SSIM(a, b) == SSIM(b, a), ' \
f'got {measure} != {reverse_measure}'
def test_ssim_raises_if_kernel_size_greater_than_image(x_y_4d_5d,
device: str) -> None:
x = x_y_4d_5d[0].to(device)
y = x_y_4d_5d[1].to(device)
kernel_size = 11
wrong_size_x = x[:, :, :kernel_size - 1, :kernel_size - 1]
wrong_size_y = y[:, :, :kernel_size - 1, :kernel_size - 1]
with pytest.raises(ValueError):
ssim(wrong_size_x, wrong_size_y, kernel_size=kernel_size)
def test_ssim_fails_for_incorrect_data_range(prediction: torch.Tensor,
target: torch.Tensor,
device: str) -> None:
# Scale to [0, 255]
prediction_scaled = (prediction * 255).type(torch.uint8)
target_scaled = (target * 255).type(torch.uint8)
with pytest.raises(AssertionError):
ssim(prediction_scaled.to(device),
target_scaled.to(device),
data_range=1.0)
def test_ssim_check_kernel_size_is_passed(x_y_4d_5d, device: str) -> None:
x = x_y_4d_5d[0].to(device)
y = x_y_4d_5d[1].to(device)
kernel_sizes = list(range(0, 50))
for kernel_size in kernel_sizes:
if kernel_size % 2:
ssim(x, y, kernel_size=kernel_size)
else:
with pytest.raises(AssertionError):
ssim(x, y, kernel_size=kernel_size)
def test_ssim_check_kernel_size_is_passed(prediction_target_4d_5d: Tuple[
torch.Tensor, torch.Tensor], device: str) -> None:
prediction = prediction_target_4d_5d[0].to(device)
target = prediction_target_4d_5d[1].to(device)
kernel_sizes = list(range(0, 50))
for kernel_size in kernel_sizes:
if kernel_size % 2:
ssim(prediction, target, kernel_size=kernel_size)
else:
with pytest.raises(AssertionError):
ssim(prediction, target, kernel_size=kernel_size)
def test_ssim_raises_if_kernel_size_greater_than_image(
prediction_target_4d_5d: Tuple[torch.Tensor,
torch.Tensor], device: str) -> None:
prediction = prediction_target_4d_5d[0].to(device)
target = prediction_target_4d_5d[1].to(device)
kernel_size = 11
wrong_size_prediction = prediction[:, :, :kernel_size - 1, :kernel_size -
1]
wrong_size_target = target[:, :, :kernel_size - 1, :kernel_size - 1]
with pytest.raises(ValueError):
ssim(wrong_size_prediction, wrong_size_target, kernel_size=kernel_size)
def test_ssim_check_available_dimensions() -> None:
custom_x = torch.rand(256, 256)
custom_y = torch.rand(256, 256)
for _ in range(10):
if custom_x.dim() < 5:
try:
ssim(custom_x, custom_y)
except Exception as e:
pytest.fail(f"Unexpected error occurred: {e}")
else:
with pytest.raises(AssertionError):
ssim(custom_x, custom_y)
custom_x.unsqueeze_(0)
custom_y.unsqueeze_(0)
def test_ssim_supports_different_data_ranges(input_tensors: Tuple[
torch.Tensor, torch.Tensor], data_range, device: str) -> None:
x, y = input_tensors
x_scaled = (x * data_range).type(torch.uint8)
y_scaled = (y * data_range).type(torch.uint8)
measure_scaled = ssim(x_scaled.to(device),
y_scaled.to(device),
data_range=data_range)
measure = ssim(x_scaled.to(device) / float(data_range),
y_scaled.to(device) / float(data_range),
data_range=1.0)
diff = torch.abs(measure_scaled - measure)
assert diff <= 1e-6, f'Result for same tensor with different data_range should be the same, got {diff}'
def test_ssim_raises_if_tensors_have_different_shapes(x_y_4d_5d,
device) -> None:
y = x_y_4d_5d[1].to(device)
dims = [[3], [2, 3], [161, 162], [161, 162]]
if y.dim() == 5:
dims += [[2, 3]]
for size in list(itertools.product(*dims)):
wrong_shape_x = torch.rand(size).to(y)
if wrong_shape_x.size() == y.size():
try:
ssim(wrong_shape_x, y)
except Exception as e:
pytest.fail(f"Unexpected error occurred: {e}")
else:
with pytest.raises(AssertionError):
ssim(wrong_shape_x, y)
def eval(self, gt, pred):
with torch.no_grad():
gt_tensor = torch.Tensor(gt).clamp(0, 1).permute(0, 3, 1,
2).to('cuda:0')
pred_tensor = torch.Tensor(pred).clamp(0,
1).permute(0, 3, 1,
2).to('cuda:0')
psnr_index = piq.psnr(pred_tensor,
gt_tensor,
data_range=1.,
reduction='none').item()
_, _, h, w = gt_tensor.shape
lpipsAlex = 0
lpipsVGG = 0
msssim_index = 0
ssim_index = 0
n = 1
for i in range(n):
for j in range(n):
xstart = w // n * j
ystart = h // n * i
xend = w // n * (j + 1)
yend = h // n * (i + 1)
ssim_index += piq.ssim(pred_tensor[:, :, ystart:yend,
xstart:xend],
gt_tensor[:, :, ystart:yend,
xstart:xend],
data_range=1.,
reduction='none').item()
msssim_index = piq.multi_scale_ssim(
pred_tensor[:, :, ystart:yend, xstart:xend],
gt_tensor[:, :, ystart:yend, xstart:xend],
data_range=1.,
reduction='none').item()
lpipsVGG += self.lpipsVGG(
pred_tensor[:, :, ystart:yend, xstart:xend],
gt_tensor[:, :, ystart:yend, xstart:xend]).item()
lpipsAlex += self.lpipsAlex(
pred_tensor[:, :, ystart:yend, xstart:xend],
gt_tensor[:, :, ystart:yend, xstart:xend]).item()
msssim_index /= n * n
ssim_index /= n * n
lpipsVGG /= n * n
lpipsAlex /= n * n
# dists = piq.DISTS(reduction='none')(pred_tensor, gt_tensor).item()
# with torch.no_grad():
# lpips_index = piq.LPIPS(reduction='none')(pred_tensor, gt_tensor).item()
rmse = ((gt - pred)**2).mean()**0.5
# relmse = (((gt - pred) ** 2).mean() / (gt ** 2).mean() + 1e-5) ** 0.5
# return {'rmse':rmse,'relmse':relmse,'psnr':psnr_index,'ssim':ssim_index,'msssim':msssim_index,'lpips':lpips_index}
return {
'rmse': rmse,
'psnr': psnr_index,
'ssim': ssim_index,
'msssim': msssim_index,
'lpipsVGG': lpipsVGG,
'lpipsAlex': lpipsAlex
}
def update(self, output):
y_pred = output[0]
y = output[1]
y_pred = torch.clamp_min(y_pred, min=0.0)
y = torch.clamp_min(y, min=0.0)
# print("CrowdCountingMeanSSIMclamp ")
# print("y_pred", y_pred.shape)
# print("y", y.shape)
y_pred = F.interpolate(y_pred, scale_factor=8) / 64
pad_density_map_tensor = torch.zeros((1, 1, y.shape[2], y.shape[3])).cuda()
pad_density_map_tensor[:, 0, :y_pred.shape[2], :y_pred.shape[3]] = y_pred
y_pred = pad_density_map_tensor
# y_max = torch.max(y)
# y_pred_max = torch.max(y_pred)
# max_value = torch.max(y_max, y_pred_max)
y = y / torch.max(y) * 255
y_pred = y_pred / torch.max(y_pred) * 255
ssim_metric = piq.ssim(y, y_pred, reduction="sum", data_range=255)
self._sum += ssim_metric.item()
# we multiply because ssim calculate mean of each image in batch
# we multiply so we will divide correctly
self._num_examples += y.shape[0]
def val_iter(self, final=True):
with torch.no_grad():
self.model.eval()
t = tqdm(self.loader_val)
if final:
t.set_description("Validation")
else:
t.set_description(f"Epoch {self.epoch} val ")
psnr_avg = AverageMeter()
ssim_avg = AverageMeter()
l1_avg = AverageMeter()
l2_avg = AverageMeter()
for hr, lr in t:
hr, lr = hr.to(self.dtype).to(self.device), lr.to(self.dtype).to(self.device)
sr = self.model(lr).clamp(0, 1)
l1_loss = torch.nn.functional.l1_loss(sr, hr).item()
l2_loss = torch.sqrt(torch.nn.functional.mse_loss(sr, hr)).item()
psnr = piq.psnr(hr, sr)
ssim = piq.ssim(hr, sr)
l1_avg.update(l1_loss)
l2_avg.update(l2_loss)
psnr_avg.update(psnr)
ssim_avg.update(ssim)
t.set_postfix(PSNR=f'{psnr_avg.get():.2f}', SSIM=f'{ssim_avg.get():.4f}')
if self.writer is not None:
self.writer.add_scalar('PSNR', psnr_avg.get(), self.epoch)
self.writer.add_scalar('SSIM', ssim_avg.get(), self.epoch)
self.writer.add_scalar('L1', l1_avg.get(), self.epoch)
self.writer.add_scalar('L2', l2_avg.get(), self.epoch)
return psnr_avg.get(), ssim_avg.get()
def forward(self,
reference_observations: torch.Tensor,
generated_observations: torch.Tensor,
range=1.0) -> torch.Tensor:
'''
Computes the ssim between the reference and the generated observations
:param reference_observations: (bs, observations_count, channels, height, width) tensor with reference observations
:param generated_observations: (bs, observations_count, channels, height, width) tensor with generated observations
:param range: The maximum value used to represent each pixel
:return: (bs, observations_count) tensor with ssim for each observation
'''
# Flattens observations and then folds the results
observations_count = reference_observations.size(1)
flattened_reference_observations = TensorFolder.flatten(
reference_observations)
flattened_generated_observations = TensorFolder.flatten(
generated_observations)
flattened_ssim = ssim(flattened_generated_observations,
flattened_reference_observations,
range,
reduction="none")
folded_ssim = TensorFolder.fold(flattened_ssim, observations_count)
return folded_ssim
def test_ssim_measure_is_less_or_equal_to_one(
ones_zeros_4d_5d: Tuple[torch.Tensor,
torch.Tensor], device: str) -> None:
# Create two maximally different tensors.
ones = ones_zeros_4d_5d[0].to(device)
zeros = ones_zeros_4d_5d[1].to(device)
measure = ssim(ones, zeros, data_range=1., reduction='none')
assert torch.le(measure, 1).all(), f'SSIM must be <= 1, got {measure}'
def test_ssim_measure_is_one_for_equal_tensors(y: torch.Tensor,
device: str) -> None:
y = y.to(device)
x = y.clone()
measure = ssim(x, y, data_range=1., reduction='none')
assert torch.allclose(measure, torch.ones_like(measure)), f'If equal tensors are passed SSIM must be equal to 1 ' \
f'(considering floating point error up to 1 * 10^-6), '\
f'got {measure}'
def test_ssim_raises_if_tensors_have_different_shapes(
prediction_target_4d_5d: Tuple[torch.Tensor,
torch.Tensor], device) -> None:
target = prediction_target_4d_5d[1].to(device)
dims = [[3], [2, 3], [161, 162], [161, 162]]
if target.dim() == 5:
dims += [[2, 3]]
for size in list(itertools.product(*dims)):
wrong_shape_prediction = torch.rand(size).to(target)
if wrong_shape_prediction.size() == target.size():
try:
ssim(wrong_shape_prediction, target)
except Exception as e:
pytest.fail(f"Unexpected error occurred: {e}")
else:
with pytest.raises(AssertionError):
ssim(wrong_shape_prediction, target)
def eval(self,gt,pred,imformat='BHWC',dtype='jax'):
if(dtype == 'jax'):
gt = np.array(gt)
pred = np.array(pred)
with torch.no_grad():
if(imformat == 'BHWC'):
gt_tensor = torch.Tensor(gt).permute(0,3,1,2).to(self.device)
pred_tensor = torch.Tensor(pred).permute(0,3,1,2).to(self.device)
elif(imformat == 'HWC'):
gt_tensor = torch.Tensor(gt[None,...]).permute(0,3,1,2).to(self.device)
pred_tensor = torch.Tensor(pred[None,...]).permute(0,3,1,2).to(self.device)
else:
print('Unknown image dimension format')
exit(0)
pred_tensor = torch.clamp(pred_tensor,0,1)
gt_tensor = torch.clamp(gt_tensor,0,1)
_,_,h,w = gt_tensor.shape
lpipsAlex = 0
lpipsVGG = 0
msssim_index = 0
ssim_index = 0
n = 1
for i in range(n):
for j in range(n):
xstart = w//n * j
ystart = h//n * i
xend = w//n * (j+1)
yend = h//n * (i+1)
if('ssim' in self.metrics):
ssim_index += piq.ssim(pred_tensor[:,:,ystart:yend,xstart:xend], gt_tensor[:,:,ystart:yend,xstart:xend], data_range=1., reduction='mean').item()
if('msssim' in self.metrics):
msssim_index = piq.multi_scale_ssim(pred_tensor[:,:,ystart:yend,xstart:xend], gt_tensor[:,:,ystart:yend,xstart:xend], data_range=1., reduction='mean').item()
if('lpipsVGG' in self.metrics):
lpipsVGG += self.lpipsVGG(pred_tensor[:,:,ystart:yend,xstart:xend], gt_tensor[:,:,ystart:yend,xstart:xend]).item()
if('lpipsAlex' in self.metrics):
lpipsAlex += self.lpipsAlex(pred_tensor[:,:,ystart:yend,xstart:xend], gt_tensor[:,:,ystart:yend,xstart:xend]).item()
res = {}
if('ssim' in self.metrics):
res['ssim'] = ssim_index / n*n
if('msssim' in self.metrics):
res['msssim'] = msssim_index / n*n
if('lpipsVGG' in self.metrics):
res['lpipsVGG'] = lpipsVGG / n*n
if('lpipsAlex' in self.metrics):
res['lpipsAlex'] = lpipsAlex / n*n
if('rmse' in self.metrics):
res['rmse'] = ((gt_tensor - pred_tensor) ** 2).mean() ** 0.5
res['mse'] = float(((gt_tensor - pred_tensor) ** 2).mean().cpu().numpy())
res['psnr'] = -10. * np.log10(res['mse']) / np.log10(10.)
return res
def validation_epoch_end(
self, outputs: List[Tuple[torch.Tensor, torch.Tensor]]) -> None:
if isinstance(self.val_dataloader().dataset, ImageLoader):
self.val_dataloader().dataset.val = False
else:
self.val_dataloader().dataset.dataset.val = False
fid_score = fid(self.forged_images, self.reference_images,
self.hparams.feature_dimensionality_fid, self.device)
ssim_score = ssim(self.forged_images,
self.reference_images,
data_range=255)
psnr_score = psnr(self.forged_images,
self.reference_images,
data_range=255)
self.log('FID_score', fid_score, on_step=False, on_epoch=True)
self.log('SSIM', ssim_score, on_step=False, on_epoch=True)
self.log('PSNR', psnr_score, on_step=False, on_epoch=True)
def image_metrics_from_dataset(dataset, output_addr='/tmp/psnr.csv'):
cols = ['file_name', 'psnr', 'ssim']
cols_str = ','.join(cols)
with open(output_addr, 'wt') as f:
f.write(f'{cols_str}\n')
dl = DataLoader(dataset, batch_size=1, shuffle=False, num_workers=0)
for i, data in tqdm(enumerate(dl), total=int(len(dataset))):
x, y, file_name = data
psnr = piq.psnr(x, y).item()
ssim = piq.ssim(x, y).item()
vals = [file_name[0], str(psnr), str(ssim)]
val_str = ','.join(vals)
with open(output_addr, 'at') as f:
f.write(f'{val_str}\n')
return pd.read_csv(output_addr)
def usage():
import torch
from piq import ssim, SSIMLoss
x = torch.rand(4, 256, 256, requires_grad=True)
y = torch.rand(4, 256, 256)
ssim_index: torch.Tensor = ssim(x, y, data_range=1.)
ssimvalue = ssim_index.detach().numpy()
assert type(ssim_index.detach().numpy()) == np.ndarray, type(
ssim_index.detach().numpy())
print(f"ssim_index: ", )
# loss = SSIMLoss(data_range=1.)
loss = SSIMLoss(data_range=1.)
output2 = loss(x, y)
output: torch.Tensor = loss(x, x)
print(output.item())
output.backward()
def test_ssim_raise_if_wrong_value_is_estimated(
test_images: Tuple[torch.Tensor, torch.Tensor], device: str) -> None:
for x, y in test_images:
piq_ssim = ssim(x.to(device),
y.to(device),
kernel_size=11,
kernel_sigma=1.5,
data_range=255,
reduction='none')
tf_x = tf.convert_to_tensor(x.permute(0, 2, 3, 1).numpy())
tf_y = tf.convert_to_tensor(y.permute(0, 2, 3, 1).numpy())
with tf.device('/CPU'):
tf_ssim = torch.tensor(
tf.image.ssim(tf_x, tf_y, max_val=255).numpy()).to(piq_ssim)
match_accuracy = 2e-4 + 1e-8
assert torch.allclose(piq_ssim, tf_ssim, rtol=0, atol=match_accuracy), \
f'The estimated value must be equal to tensorflow provided one' \
f'(considering floating point operation error up to {match_accuracy}), ' \
f'got difference {(piq_ssim - tf_ssim).abs()}'
def grid_search(x, y, rec_func, grid):
""" Grid search utility for tuning hyper-parameters. """
err_min = np.inf
grid_param = None
grid_shape = [len(val) for val in grid.values()]
err = torch.zeros(grid_shape)
err_psnr = torch.zeros(grid_shape)
err_ssim = torch.zeros(grid_shape)
for grid_val, nidx in zip(itertools.product(*grid.values()),
np.ndindex(*grid_shape)):
grid_param_cur = dict(zip(grid.keys(), grid_val))
print(
"Current grid parameters (" + str(list(nidx)) + " / " +
str(grid_shape) + "): " + str(grid_param_cur),
flush=True,
)
x_rec = rec_func(y, **grid_param_cur)
err[nidx], _ = l2_error(x_rec, x, relative=True, squared=False)
err_psnr[nidx] = psnr(
rotate_real(x_rec)[:, 0:1, ...],
rotate_real(x)[:, 0:1, ...],
data_range=rotate_real(x)[:, 0:1, ...].max(),
reduction="mean",
)
err_ssim[nidx] = ssim(
rotate_real(x_rec)[:, 0:1, ...],
rotate_real(x)[:, 0:1, ...],
data_range=rotate_real(x)[:, 0:1, ...].max(),
size_average=True,
)
print("Rel. recovery error: {:1.2e}".format(err[nidx]), flush=True)
print("PSNR: {:.2f}".format(err_psnr[nidx]), flush=True)
print("SSIM: {:.2f}".format(err_ssim[nidx]), flush=True)
if err[nidx] < err_min:
grid_param = grid_param_cur
err_min = err[nidx]
return grid_param, err_min, err, err_psnr, err_ssim
def forward(self, predict, target):
if self.l1_norm:
l1_norm_metric = nn.functional.l1_loss(predict, target)
if self.mse:
mse_norm_metric = nn.functional.mse_loss(predict, target)
if self.pearsonr:
pearsonr_metric = audtorch.metrics.functional.pearsonr(predict, target).mean()
if self.cc:
cc_metric = audtorch.metrics.functional.concordance_cc(predict, target).mean()
if self.psnr:
psnr_metric = piq.psnr(predict, target, data_range=1., reduction='none').mean()
if self.ssim:
ssim_metric = piq.ssim(predict, target, data_range=1.)
if self.mssim:
mssim_metric = piq.multi_scale_ssim(predict, target, data_range=1.)
metric_summary = {'l1_norm': l1_norm_metric,
'mse': mse_norm_metric,
'pearsonr_metric': pearsonr_metric,
'cc': cc_metric,
'psnr': psnr_metric,
'ssim': ssim_metric,
'mssim': mssim_metric
}
return metric_summary
def main(args):
input_shape = (3, 380, 380)
if not os.path.exists(args.checkpoints_output):
os.makedirs(args.checkpoints_output)
if not os.path.exists(args.logs):
os.makedirs(args.logs)
images_output = os.path.join(args.logs, 'images')
if not os.path.exists(images_output):
os.makedirs(images_output)
if not args.model in models:
print(f"Model name {args.model} must be one of: {model_names}")
return 1
print(f"Seting up training for model: {args.model}")
print(f"Train X Root: {args.train_x_root}")
print(f"Train Y Root: {args.train_y_root}")
if args.test_x is not None and args.test_y is not None:
print(f"Test X Root: {args.test_x}")
print(f"Test Y Root: {args.test_y}")
normalize_transform = transforms.Normalize((0.5, 0.5, 0.5),
(0.5, 0.5, 0.5))
if args.test_x is None or args.test_y is None:
dataset = EnumPairedDataset(args.train_x_root,
args.train_y_root,
transform=normalize_transform)
train_d, test_d = train_val_dataset(dataset)
else:
train_d = EnumPairedDataset(args.train_x_root,
args.train_y_root,
transform=normalize_transform)
test_d = EnumPairedDataset(args.test_x_root,
args.test_y_root,
transform=normalize_transform)
train_batch_size = args.train_batch_size
test_batch_size = args.test_batch_size
train_dl = DataLoader(train_d,
batch_size=train_batch_size,
shuffle=True,
num_workers=0)
test_dl = DataLoader(test_d,
batch_size=test_batch_size,
shuffle=True,
num_workers=0)
if args.show_dataset:
x_batch, y_batch, names = next(iter(train_dl))
plt.subplot(2, 1, 1)
plt.imshow(torchvision.utils.make_grid(x_batch).permute(1, 2, 0))
plt.subplot(2, 1, 2)
plt.imshow(torchvision.utils.make_grid(y_batch).permute(1, 2, 0))
plt.show()
model = models[args.model]
model = torch.nn.DataParallel(model,
device_ids=range(torch.cuda.device_count()))
device = f"cuda:{model.device_ids[0]}"
#device = 'cpu'
model.to(device)
summary(model, input_shape)
optimizer = optim.Adam(model.parameters(), lr=args.learning_rate)
#criterion = loss_fun()
if args.load is not None:
try:
pretrained_dict = torch.load(args.load)
model_dict = model.state_dict()
model_dict.update(pretrained_dict)
model.load_state_dict(model_dict)
print(f"Weights loaded from {args.load}")
except Exception as e:
print(f"Couldn't load weights from {args.load}")
print(e)
best_training_loss = math.inf
test_loss_for_best_training_loss = math.inf
cols = [
'epoch', 'training_loss', 'test_loss', 'train_psnr', 'test_psnr',
'train_ssim', 'test_ssim'
]
logs_addr = os.path.join(args.logs, 'logs.csv')
add_line_to_csv(logs_addr, cols)
print(f"Logs to: {args.logs}")
epochs = args.epochs
if epochs <= args.from_epoch:
epochs += args.from_epoch
for epoch in range(args.from_epoch, epochs + 1):
print(f"Epoch {epoch}/{epochs}")
training_loss = 0.0
test_loss = 0.0
train_psnr = 0.0
test_psnr = 0.0
train_ssim = 0.0
test_ssim = 0.0
if args.load is not None:
try:
fn, ext = os.path.splitext(os.path.basename(args.load))
loss_vals = fn.split('_')
best_training_loss = float(loss_vals[2])
test_loss_for_best_training_loss = float(loss_vals[3])
except Exception as e:
print(f"Couldn't load best training loss from {args.load}")
print(e)
print("Training:")
for i, data in tqdm(enumerate(train_dl),
total=int(len(train_d) / train_batch_size)):
w, m, file_name = data
x = w.to(device)
y = m.to(device)
del w
del m
optimizer.zero_grad()
y_hat = model(x)
loss = loss_fun(y_hat, y)
loss.backward()
optimizer.step()
training_loss += float(loss.item())
del x
'''
train_psnr = piq.psnr(y_hat[0], y[0],data_range=1.,
reduction='none')
train_ssim = piq.ssim(y_hat[0], y[0], data_range=1.,
reduction='none')
'''
del y
del y_hat
training_loss /= (i + 1)
#train_psnr /= (i+1)
#train_ssim /= (i+1)
with torch.no_grad():
print("Testing:")
for i, data in tqdm(enumerate(test_dl),
total=int(len(test_d) / test_batch_size)):
w, m, file_name = data
x = w.to(device)
y = m.to(device)
y_hat = model(x)
loss = loss_fun(y_hat, y)
test_loss += float(loss.item())
del x
try:
test_psnr += piq.psnr(y_hat, y)
test_ssim += piq.ssim(y_hat, y)
except:
pass
if args.show_output_images and i < 5:
imgs_dir = os.path.join(images_output, f"epoch_{epoch}")
if not os.path.exists(imgs_dir):
os.makedirs(imgs_dir)
for j, y_hat_i in enumerate(y_hat):
fn = os.path.splitext(os.path.basename(
file_name[j]))[0]
y_gt = y[j]
img_i_addr = os.path.join(
imgs_dir,
f'{epoch}_{fn}_{i}_{j}.{dataset.images_extension}')
img_i_gt_addr = os.path.join(
imgs_dir,
f'{epoch}_{fn}_{i}_{j}_gt.{dataset.images_extension}'
)
torchvision.utils.save_image(y_hat_i, img_i_addr)
torchvision.utils.save_image(y_gt, img_i_gt_addr)
del y_gt
del y
del y_hat
test_loss /= (i + 1)
test_psnr /= (i + 1)
test_ssim /= (i + 1)
print(f"Completed Epoch: {epoch}/{args.epochs}")
print(f"\tTrain loss: {training_loss}")
print(f"\tTest loss: {test_loss}")
print(f"\tTrain PSNR: {train_psnr}")
print(f"\tTest PSNR: {test_psnr}")
print(f"\tTrain SSIM: {train_ssim}")
print(f"\tTest SSIM: {test_ssim}")
print(f"\tBest training loss so far: {best_training_loss}")
print(f"\tTest loss for: {test_loss_for_best_training_loss}")
add_line_to_csv(logs_addr, [
str(epoch),
str(training_loss),
str(test_loss),
str(train_psnr),
str(test_psnr),
str(train_ssim),
str(test_ssim)
])
if best_training_loss > training_loss:
best_training_loss = training_loss
test_loss_for_best_training_loss = test_loss
save_file_name = f"{args.model}_epoch_{epoch}_{best_training_loss:.3f}_{test_loss_for_best_training_loss:.3f}.pth"
checkpoint_path = os.path.join(args.checkpoints_output,
save_file_name)
torch.save(model.state_dict(), checkpoint_path)