def summaries(writer, result, fbp, true, loss, it, do_print=False):
"""Save and print training and validation data to tensorboard"""
residual = result - true
squared_error = residual**2
mse = torch.mean(squared_error)
maxval = torch.max(true) - torch.min(true)
psnr = 20 * torch.log10(maxval) - 10 * torch.log10(mse)
# ratio of mse to fbp mse
relative = torch.mean((result - true)**2) / torch.mean((fbp - true)**2)
ssi = ssim(result, true)
ssi_fbp = ssim(fbp, true)
# relative ssim
relative_ssim = ssi / ssi_fbp
if do_print:
print(it, mse.item(), psnr.item(), relative.item(), ssi.item(),
relative_ssim.item())
writer.add_scalar('loss', loss, it)
writer.add_scalar('psnr', psnr, it)
writer.add_scalar('relative', relative, it)
writer.add_scalar('ssim', ssi, it)
writer.add_scalar('relative ssim', relative_ssim, it)
util.summary_image(writer, 'result', result, it)
util.summary_image(writer, 'true', true, it)
def forward(self, x, y, o, v, p, r, iteration, additional=None):
Y = self.eval(x, o, v, p, r)
losses = {}
# Different loss functions, we used logl1 + logssim
if "logl1" in self.loss:
logl1 = 2 * torch.abs(Y - torch.log1p(y))
losses["generator" + str(self.index) + "_logl1"] = logl1
if "l1" in self.loss:
l1 = 0.5 * torch.abs(Y - y)
losses["generator" + str(self.index) + "_l1"] = l1
if "logssim" in self.loss:
logssim = 1.0 - pytorch_ssim.ssim(torch.log1p(y), Y)
losses["generator" + str(self.index) + "_logssim"] = logssim
if "ssim" in self.loss:
ssim = 1.0 - pytorch_ssim.ssim(y, Y)
losses["generator" + str(self.index) + "_ssim"] = ssim
if "nll" in self.loss:
sigma = max(0.1 + (2.0 - 0.1) * (1 - iteration / 2e4), 0.1)
ll = -D.Normal(Y, sigma).log_prob(y)
losses["generator" + str(self.index) + "_nll"] = ll
if "logl1" in self.loss or "logssim" in self.loss:
Y = torch.exp(Y) - 1
output = {}
output["generated"] = Y
output["losses"] = losses
return output
def forward(self, x, y, o, v, p, r, iteration, additional=None):
Y = self.eval(x, o, v, p, r)
losses = {}
# Different loss functions, we used logl1 + logssim
if "logl1" in self.loss:
logl1 = 2 * torch.abs(Y - torch.log1p(y))
losses["generator" + str(self.index) + "_logl1"] = logl1
if "l1" in self.loss:
l1 = 2 * torch.abs(Y - y)
losses["generator" + str(self.index) + "_l1"] = l1
if "logl2" in self.loss:
logl2 = 2 * torch.abs(Y -
torch.log1p(y)) * torch.abs(Y -
torch.log1p(y))
losses["generator" + str(self.index) + "_l2"] = 250 * logl2
if "logssim" in self.loss:
logssim = 1.0 - pytorch_ssim.ssim(torch.log1p(y), Y)
losses["generator" + str(self.index) + "_logssim"] = logssim
if "ssim" in self.loss:
ssim = 1.0 - pytorch_ssim.ssim(y, Y)
losses["generator" + str(self.index) + "_ssim"] = ssim
if "nll" in self.loss:
sigma = max(0.1 + (2.0 - 0.1) * (1 - iteration / 2e5), 0.1)
ll = -D.Normal(Y, sigma).log_prob(y)
losses["generator" + str(self.index) + "_nll"] = 0.2 * ll
if "bce" in self.loss:
losses["generator" + str(self.index) +
"_bce"] = 10 * self.bce_loss(Y, y)
if "vgg" in self.loss:
y_norm = torch.log1p(y).clamp(0, 1)
Y_norm = Y.clamp(0, 1)
target_features = self.vgg(y_norm)
output_features = self.vgg(Y_norm)
vgg_loss = 0
for i in range(len(target_features)):
vgg_loss += torch.mean(
(target_features[i] - output_features[i]) *
(target_features[i] - output_features[i]),
dim=[1, 2, 3],
keepdim=True)
losses["generator" + str(self.index) + "_vgg"] = 0.2 * vgg_loss
if "logl1" in self.loss or "logssim" in self.loss or "logl2" in self.loss:
Y = torch.exp(Y) - 1
output = {}
output["generated"] = Y
output["losses"] = losses
return output
def forward(self, input, target):
base_loss = self.base_loss
y1 = input[:, 0:1, :, :]
y2 = input[:, 1:2, :, :]
base_1 = base_loss(y1, target)
base_2 = base_loss(y2, target)
stable_err = F.mse_loss(y1, y2)
loss = (base_1 * self.base_loss_wt + base_2 * self.base_loss_wt +
stable_err * self.stable_wt)
self.metrics = {
'pixel': (base_1 + base_2) / 2,
'stable': stable_err,
'ssim': (ssim.ssim(y1, target) + ssim.ssim(y2, target)) / 2,
'psnr': (psnr(y1, target) + psnr(y2, target)) / 2
}
return loss
def ssim(x, y):
device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
x = x.to(device) if x.device.type != device.type else x
y = y.to(device) if y.device.type != device.type else y
with torch.no_grad():
return pytorch_ssim.ssim(x, y).item()
def ra(input_sr_var, target_sr_var, target_cls_var, model_sr, model_transformer, model,
optimizer_sr, optimizer_transformer, criterion_sr, criterion, train=True):
if train:
optimizer_sr.zero_grad()
# pdb.set_trace()
output_sr = model_sr(input_sr_var)
# pdb.set_trace()
loss_sr = criterion_sr(output_sr, target_sr_var)
loss_cls = 0
input_cls = process_to_input_cls(output_sr)
output_cls = model(input_cls)
loss_cls = criterion(output_cls, target_cls_var)
# compute ssim for every image
ssim = 0
# not compute during training to save time
if not train:
for i in range(output_sr.size(0)):
sr_image = output_sr[i].unsqueeze(0)
hr_image = target_sr_var[i].unsqueeze(0)
ssim += pytorch_ssim.ssim(sr_image, hr_image).item()
ssim = ssim / output_sr.size(0)
loss = loss_sr + args.l * loss_cls
if train:
loss.backward()
optimizer_sr.step()
return loss_sr, loss_cls, output_cls, ssim
def forward(self, x, y):
# diff = x - y
# loss_c = torch.mean(torch.sqrt(diff * diff + self.eps))
# loss_s = 1 - pytorch_ssim.ssim(x, y)
# loss = loss_c + self.lambda_* loss_s
loss = 1 - pytorch_ssim.ssim(x, y)
return loss, None
def forward(self, out_labels, out_images, target_images):
# Adversarial Loss
adversarial_loss = torch.mean(1 - out_labels)
# Perception Loss
perception_loss = self.mse_loss(self.loss_network(out_images),
self.loss_network(target_images))
# Image Loss
image_loss = self.mse_loss(out_images, target_images)
# TV Loss
tv_loss = self.tv_loss(out_images)
#ssim Loss
#print("cal ssim loss !!!")
ssim_loss = pytorch_ssim.ssim(Variable(target_images),
Variable(out_images))
# out_batch = out_images.cpu().detach().numpy()
# label_batch = target_images.cpu().detach().numpy()
# #print("to cpu !!!")
# N, _, _, _ = out_batch.shape
# #print(type(label_batch[0]))
# ssim_loss = 0
# for i in range(N):
# ssim_loss += compare_ssim(label_batch[i],out_batch[i], win_size=3, multichannel=True)
# ssim_loss /= N
# #print("get ssim_loss ------")
return image_loss + 0.001 * adversarial_loss + 0.006 * perception_loss - 1e-6 * ssim_loss
def ssim(img1, img2):
img1 = torch.from_numpy(np.rollaxis(img1, 2)).float().unsqueeze(0) / 255.0
img2 = torch.from_numpy(np.rollaxis(img2, 2)).float().unsqueeze(0) / 255.0
img1 = Variable(img1, requires_grad=False) # torch.Size([256, 256, 3])
img2 = Variable(img2, requires_grad=False)
ssim_value = pytorch_ssim.ssim(img1, img2).item()
return ssim_value
def maxSsim(cls):
npImg1 = cv2.imread("einstein.png")
img1 = torch.from_numpy(np.rollaxis(npImg1,
2)).float().unsqueeze(0) / 255.0
img2 = torch.rand(img1.size())
if torch.cuda.is_available():
img1 = img1.cuda()
img2 = img2.cuda()
img1 = Variable(img1, requires_grad=False)
img2 = Variable(img2, requires_grad=True)
# Functional: pytorch_ssim.ssim(img1, img2, window_size = 11, size_average = True)
ssim_value = pytorch_ssim.ssim(img1, img2).data[0]
print("Initial ssim:", ssim_value)
# Module: pytorch_ssim.SSIM(window_size = 11, size_average = True)
ssim_loss = pytorch_ssim.SSIM()
optimizer = optim.Adam([img2], lr=0.01)
while ssim_value < 0.95:
optimizer.zero_grad()
ssim_out = -ssim_loss(img1, img2)
ssim_value = -ssim_out.data[0]
print(ssim_value)
ssim_out.backward()
optimizer.step()
def infer(data_path, model):
psnr = utils.AvgrageMeter()
ssim = utils.AvgrageMeter()
model.eval()
transforms = torchvision.transforms.Compose(
[torchvision.transforms.ToTensor()])
with torch.no_grad():
for step, pt in enumerate(glob.glob(data_path)):
image = np.array(Image.open(pt))
clear_image = utils.crop_img(image[:, :image.shape[1] // 2, :],
base=args.patch_size)
rain_image = utils.crop_img(image[:, image.shape[1] // 2:, :],
base=args.patch_size)
# # Test on whole image
# input = transforms(rain_image).unsqueeze(dim=0).cuda()
# target = transforms(clear_image).unsqueeze(dim=0).cuda(async=True)
# logits = model(input)
# n = input.size(0)
# Test on whole image with data augmentation
target = transforms(clear_image).unsqueeze(dim=0).cuda()
for i in range(8):
im = utils.data_augmentation(rain_image, i)
input = transforms(im.copy()).unsqueeze(dim=0).cuda()
begin_time = time.time()
if i == 0:
logits = utils.inverse_augmentation(
model(input).cpu().numpy().transpose(0, 2, 3, 1)[0], i)
else:
logits = logits + utils.inverse_augmentation(
model(input).cpu().numpy().transpose(0, 2, 3, 1)[0], i)
end_time = time.time()
n = input.size(0)
logits = transforms(logits / 8).unsqueeze(dim=0).cuda()
# # Test on patches2patches
# noise_patches = utils.slice_image2patches(rain_image, patch_size=args.patch_size)
# image_patches = utils.slice_image2patches(clear_image, patch_size=args.patch_size)
# input = torch.tensor(noise_patches.transpose(0,3,1,2)/255.0, dtype=torch.float32).cuda()
# target = torch.tensor(image_patches.transpose(0,3,1,2)/255.0, dtype=torch.float32).cuda()
# logits = model(input)
# n = input.size(0)
s = pytorch_ssim.ssim(torch.clamp(logits, 0, 1), target)
p = utils.compute_psnr(
np.clip(logits.detach().cpu().numpy(), 0, 1),
target.detach().cpu().numpy())
psnr.update(p, n)
ssim.update(s, n)
print('psnr:%6f ssim:%6f' % (p, s))
# Image.fromarray(rain_image).save(args.save+'/'+str(step)+'_noise.png')
# Image.fromarray(np.clip(logits[0].cpu().numpy().transpose(1,2,0)*255, 0, 255).astype(np.uint8)).save(args.save+'/'+str(step)+'_denoised.png')
return psnr.avg, ssim.avg
def forward(self, x, y):
diff = x - y
loss_c = torch.mean(torch.sqrt(diff * diff + self.eps))
loss_s = 1 - pytorch_ssim.ssim(x, y)
x_input = torch.cat((x, y), 1)
loss_v = 1 - self.vmaf_model(x_input)
loss = loss_c + self.lambda_ * loss_s + self.lambda_vmaf * loss_v
return loss, [loss_c, loss_s, loss_v]
def ssim(outputs, labels):
if torch.cuda.is_available():
outputs = Variable(torch.from_numpy(outputs)).cuda()
labels = Variable(torch.from_numpy(labels)).cuda()
ssim = ps.ssim(outputs, labels)
return ssim
def ssim(outputs, labels):
if torch.cuda.is_available():
outputs = Variable(torch.from_numpy(outputs)).cuda()
labels = Variable(torch.from_numpy(labels)).cuda()
#print(outputs.size)
ssim = ps.ssim(outputs, labels)
#print('ssim')
#print(ssim)
return ssim
def similarityLoss(outImage, inImage, alpha, windowSize):
L1LossTerm = F.l1_loss(outImage, inImage, reduction='mean')
SSIMLossTerm = pytorch_ssim.ssim(outImage,
inImage,
window_size=windowSize,
size_average=True)
loss = alpha * ((1 - SSIMLossTerm) / 2) + (1 - alpha) * L1LossTerm
#print (loss)
return loss
def ssim(imgs, re_imgs):
ssim_list = torch.zeros(imgs.size(0)).to(main.device)
for i, (img, re_img) in enumerate(zip(imgs, re_imgs), 0):
img = img.unsqueeze(0)
re_img = re_img.unsqueeze(0)
img = img.unsqueeze(0)
re_img = re_img.unsqueeze(0)
# img, re_img = img*255, re_img*255
ssim_list[i] = pytorch_ssim.ssim(img, re_img)
return ssim_list
def write_error(estimated, reference, resultPath):
curPSNR = compute_psnr(estimated, reference)
estimated = Variable(estimated.unsqueeze(3).permute(3, 2, 0, 1))
reference = Variable(reference.unsqueeze(3).permute(3, 2, 0, 1))
curSSIM = pytorch_ssim.ssim(estimated, reference).data[0]
fid = open(resultPath + '/ObjectiveQuality_GAN.txt', 'w')
fid.write('PSNR: %3.2f\n' % curPSNR)
fid.write('SSIM: %1.3f\n' % curSSIM)
fid.close()
def basicUsage(cls):
img1 = Variable(torch.rand(1, 1, 256, 256))
img2 = Variable(torch.rand(1, 1, 256, 256))
if torch.cuda.is_available():
img1 = img1.cuda()
img2 = img2.cuda()
print(pytorch_ssim.ssim(img1, img2))
ssim_loss = pytorch_ssim.SSIM(window_size=11)
print(ssim_loss(img1, img2))
def G_loss(g1, g2, pixel_label, dl, dh, trade_off, batch_size):
content_loss = ((mse(g1, pixel_label) + mse(g2, pixel_label)) /
(10 * batch_size))
adv_cls_loss = (torch.sum(bce(dl, dh) * trade_off) / batch_size) * 15000
ssim_loss = pytorch_ssim.ssim(g2, pixel_label)
ssim_loss = 2 * (1000 - (ssim_loss * 1000))
return content_loss, ssim_loss, adv_cls_loss
def calc_ssim(sr, hr, scale, rgb_range, dataset=None):
if hr.nelement() == 1: return 0
shave = scale
gray_coeffs = [65.738, 129.057, 25.064]
convert_s = sr.new_tensor(gray_coeffs).view(1, 3, 1, 1) / 256
sr = sr.mul(convert_s).sum(dim=1).unsqueeze(0) + 16 * torch.ones_like(hr)
convert_h = hr.new_tensor(gray_coeffs).view(1, 3, 1, 1) / 256
hr = hr.mul(convert_h).sum(dim=1).unsqueeze(0) + 16 * torch.ones_like(hr)
return pytorch_ssim.ssim(sr[..., shave:-shave, shave:-shave], hr[..., shave:-shave, shave:-shave],
data_range=rgb_range, size_average=True)
def train_just_vae(self, s_batch, next_obs_batch):
s_batch = torch.FloatTensor(s_batch).to(self.device)
next_obs_batch = torch.FloatTensor(next_obs_batch).to(self.device)
sample_range = np.arange(len(s_batch))
reconstruction_loss = nn.MSELoss(reduction='none')
recon_losses = np.array([])
kld_losses = np.array([])
for i in range(self.epoch):
np.random.shuffle(sample_range)
for j in range(int(len(s_batch) / self.batch_size)):
sample_idx = sample_range[self.batch_size * j:self.batch_size *
(j + 1)]
# --------------------------------------------------------------------------------
# for generative curiosity (VAE loss)
gen_next_state, mu, logvar = self.vae(
next_obs_batch[sample_idx])
d = len(gen_next_state.shape)
recon_loss = -1 * pytorch_ssim.ssim(gen_next_state,
next_obs_batch[sample_idx],
size_average=False)
# recon_loss = reconstruction_loss(gen_next_state, next_obs_batch[sample_idx]).mean(axis=list(range(1, d)))
kld_loss = -0.5 * (1 + logvar - mu.pow(2) -
logvar.exp()).sum(axis=1)
# TODO: keep this proportion of experience used for VAE update?
# Proportion of experience used for VAE update
mask = torch.rand(len(recon_loss)).to(self.device)
mask = (mask < self.update_proportion).type(
torch.FloatTensor).to(self.device)
recon_loss = (recon_loss * mask).sum() / torch.max(
mask.sum(),
torch.Tensor([1]).to(self.device))
kld_loss = (kld_loss * mask).sum() / torch.max(
mask.sum(),
torch.Tensor([1]).to(self.device))
recon_losses = np.append(recon_losses,
recon_loss.detach().cpu().numpy())
kld_losses = np.append(kld_losses,
kld_loss.detach().cpu().numpy())
# ---------------------------------------------------------------------------------
self.optimizer.zero_grad()
loss = recon_loss + kld_loss
loss.backward()
global_grad_norm_(list(self.vae.parameters()))
self.optimizer.step()
return recon_losses, kld_losses
def process(args, verbose=True):
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
model = Model(args).to(device)
model.load_state_dict(torch.load(args.weights, map_location=device))
model.eval()
dataset = SpectogramDataset(args.source_dir, extension=args.extension)
files = dataset.files
if verbose:
print("Processing {} files.".format(len(files)))
filenames = []
results = []
denoised_filenames = []
target_dir = Path(args.target_dir)
Path.mkdir(target_dir, exist_ok=True, parents=True)
for file_idx in tqdm(range(len(dataset)), unit="files"):
filename = files[file_idx]
filenames.append(filename)
img = dataset[file_idx].unsqueeze(0)
img = img.to(device, dtype=torch.float)
noise = model(img).to("cpu")
img = img.to("cpu")
if ssim(img - noise, img).data.item() >= args.threshold:
results.append("clean")
denoised_filenames.append("")
else:
results.append("noisy")
denoised_filename = target_dir / (
args.denoised_subdir +
filename.split(str(Path(args.source_dir)))[1])
Path.mkdir(denoised_filename.parent, exist_ok=True, parents=True)
denoised_filenames.append(str(denoised_filename))
clean_img = img - noise
np.save(denoised_filename, clean_img.to("cpu").detach().numpy())
results_df = pd.DataFrame({
"file_name": filenames,
"result": results,
"denoised_file": denoised_filenames
})
results_df.to_csv(target_dir / "results.csv", index=False)
return results_df
def main():
args = get_args()
img_size = args.eval_image_size
src_dir = args.src_dir
num_samples = args.num_samples
l1_loss_fn = nn.L1Loss()
loss_fn_vgg = lpips.LPIPS(net='vgg')
l1_results = np.empty(num_samples)
ssim_results = np.empty(num_samples)
lpips_results = np.empty(num_samples)
transforms = trafo.Compose(
[trafo.ToTensor(),
trafo.Normalize((0.5, 0.5, 0.5), (0.5, 0.5, 0.5))])
for idx in range(num_samples):
idx_str = "{:05d}".format(idx)
# reads images as (height,width,channel)
im_pred = imageio.imread("{}/{}_pred.png".format(src_dir, idx_str))
im_true = imageio.imread("{}/{}_tgt.png".format(src_dir, idx_str))
# normalize the values to be [-1,1]
im_pred_torch = transforms(im_pred).unsqueeze(0)
im_true_torch = transforms(im_true).unsqueeze(0)
# resize images to be at the desired resolution if not already
if not args.no_resize and (im_pred_torch.shape[-1] != img_size
or im_true_torch.shape[-1] != img_size):
im_pred_torch = F.interpolate(im_pred_torch, (img_size, img_size))
im_true_torch = F.interpolate(im_true_torch, (img_size, img_size))
# compute l1 error
l1_loss = l1_loss_fn(im_pred_torch, im_true_torch)
l1_results[idx] = l1_loss
# compute ssim error
ssim_loss = ssim(im_pred_torch, im_true_torch)
ssim_results[idx] = ssim_loss
# Compute lpips score
lp = loss_fn_vgg(im_pred_torch, im_true_torch)
lpips_results[idx] = lp
if idx % 1000 == 0:
print(
f"{idx}, im dim: {im_pred_torch.shape[-1]} -- l1, ssim loss, lpips: {l1_loss, ssim_loss, lp}"
)
print(f"L1 loss mean: {l1_results.mean()}, std: {l1_results.std()}")
print(f"SSIM loss mean: {ssim_results.mean()}, std: {ssim_results.std()}")
print(f"LPIPS score: {lpips_results.mean()}, std: {lpips_results.std()}")
def testing():
path = "path_exp/checkpoint/DFS/{}/netG_model_best.pth".format(name_exp)
net = torch.load(path)
net.eval()
SEG_NET.eval()
features.eval()
with torch.no_grad():
total_mse = 0
total_mse2 = 0
avg_psnr_depth = 0
avg_psnr_dehaze = 0
avg_ssim_depth = 0
avg_ssim_dehaze = 0
for batch in testing_data_loader:
input, target, depth = Variable(batch[0]), Variable(batch[1]), Variable(batch[2])
if cuda == True:
input = input.cuda()
target = target.cuda()
depth = depth.cuda()
dehaze = net(input)
prediction = SEG_NET(dehaze)
avg_ssim_dehaze += pytorch_ssim.ssim(dehaze, target).item()
mse = criterionMSE(prediction, depth)
total_mse += mse.item()
avg_psnr_depth += 10 * log10(1 / mse.item())
mse2 = criterionMSE(dehaze, target)
total_mse2 += mse2.item()
avg_psnr_dehaze += 10 * log10(1 / mse2.item())
avg_ssim_depth += pytorch_ssim.ssim(prediction, depth).item()
print("===> Testing")
print("===> PSNR seg: {:.4f} ".format(avg_psnr_depth / len(testing_data_loader)))
print("===> Mse seg: {:.4f} ".format(total_mse / len(testing_data_loader)))
print("===> SSIM seg: {:.4f} ".format(avg_ssim_depth / len(testing_data_loader)))
print("===> PSNR dehaze: {:.4f} ".format(avg_psnr_dehaze / len(testing_data_loader)))
print("===> SSIM dehaze: {:.4f} ".format(avg_ssim_dehaze / len(testing_data_loader)))
def _get_SSIM_score(self, pred_image: torch.tensor,
gt_image: torch.tensor):
"""
pred_image.shape == (1xCxWxH)
gt_image.shape == (1xCxWxH)
"""
gt_image = gt_image / 255
if self.device != 'cpu':
pred_image = pred_image.to(self.device)
gt_image = gt_image.to(self.device)
score = ssim(pred_image, gt_image)
self.SSIM_scores.append(score.cpu().numpy())
def get_acc(masks, preds, batch_size):
mssim = 0
if masks.size(0) < batch_size:
batch_size = masks.size(0)
for index in range(batch_size):
mask = Variable(masks[index].unsqueeze(0))
pred = Variable(preds[index].unsqueeze(0))
mssim += pytorch_ssim.ssim(mask, pred)
#mssim = ssim(mask,pred,multichannel=True,gaussian_weights=True)
return mssim / batch_size
def test(test_gen, model, criterion, SR_dir):
avg_psnr = 0
avg_ssim = 0
med_time = []
with torch.no_grad():
for iteration, batch in enumerate(test_gen, 1):
# print(iteration)
Blur = batch[0]
HR = batch[1]
Blur = Blur.to(device)
HR = HR.to(device)
name = batch[2][0][:-4]
start_time = time.perf_counter(
) #-------------------------begin to deal with an image's time
sr = model(Blur)
#modify
try:
sr = torch.clamp(sr, min=0, max=1)
except:
sr = sr[0]
sr = torch.clamp(sr, min=0, max=1)
torch.cuda.synchronize() #wait for CPU & GPU time syn
evalation_time = time.perf_counter(
) - start_time #---------finish an image
med_time.append(evalation_time)
ssim = pytorch_ssim.ssim(sr, HR)
#print(ssim)
avg_ssim += ssim
mse = criterion(sr, HR)
psnr = 10 * log10(1 / mse)
#
resultSRDeblur = transforms.ToPILImage()(sr.cpu()[0])
resultSRDeblur.save(
join(SR_dir, '{0}_{1}.png'.format(name, opt.name)))
print("Processing {}: PSNR:{} TIME:{}".format(
iteration, psnr, evalation_time))
avg_psnr += psnr
print("===> Avg. SR SSIM: {:.4f} ".format(avg_ssim / iteration))
print("Avg. SR PSNR:{:4f} dB".format(avg_psnr / iteration))
median_time = statistics.median(med_time)
print(median_time)
return avg_psnr / iteration
def ssim(img1, img2):
# resizing the images to same dimensions
if img1.shape != img2.shape:
img2 = cv2.resize(img2, (img1.shape[1], img1.shape[0]),
interpolation=cv2.INTER_LANCZOS4)
# put array into a format compatible to run the calculations with tensorflow
img1 = torch.from_numpy(np.rollaxis(img1, 2)).float().unsqueeze(0) / 255.0
img2 = torch.from_numpy(np.rollaxis(img2, 2)).float().unsqueeze(0) / 255.0
# ssim calculation (return a tensor)
ssim = pytorch_ssim.ssim(img1, img2)
return ssim.item() # to get the value from the tensor
def summaries(writer, result, fbp, true, loss, it, do_print=False):
residual = result - true
squared_error = residual**2
mse = torch.mean(squared_error)
maxval = torch.max(true) - torch.min(true)
psnr = 20 * torch.log10(maxval) - 10 * torch.log10(mse)
relative = torch.mean((result - true)**2) / torch.mean((fbp - true)**2)
ssi = ssim(result, true)
ssi_fbp = ssim(result, fbp)
relative_ssim = ssi / ssi_fbp
if do_print:
print(it, mse.item(), psnr.item(), relative.item(), ssi.item(),
relative_ssim.item())
writer.add_scalar('loss', loss, it)
writer.add_scalar('psnr', psnr, it)
writer.add_scalar('relative', relative, it)
writer.add_scalar('ssim', ssi, it)
writer.add_scalar('relative ssim', relative_ssim, it)
util.summary_image(writer, 'result', result, it)
util.summary_image(writer, 'true', true, it)
def train(opt, data_loader, model, visualizer):
logger = Logger('./checkpoints/log/')
dataset = data_loader.load_data()
dataset_size = len(data_loader)
print('#training images = %d' % dataset_size)
total_steps = 0
for epoch in range(opt.epoch_count, opt.niter + opt.niter_decay + 1):
epoch_start_time = time.time()
epoch_iter = 0
for i, data in enumerate(dataset):
iter_start_time = time.time()
total_steps += opt.batchSize
epoch_iter += opt.batchSize
model.set_input(data)
model.optimize_parameters()
if total_steps % opt.display_freq == 0:
results = model.get_current_visuals()
ssim = pytorch_ssim.ssim(results['fake_B'], results['real_B']).item()
psnrMetric = PSNR(results['Restored_Train'],results['Sharp_Train'])
print('PSNR = %f, SSIM = %.4f' % (psnrMetric, ssim))
results.pop('fake_B') # 计算完SSIM，就去掉多余项
results.pop('real_B')
visualizer.display_current_results(results,epoch)
if total_steps % opt.print_freq == 0:
errors = model.get_current_errors()
for tag, value in errors.items():
logger.scalar_summary(tag, value, epoch)
t = (time.time() - iter_start_time) / opt.batchSize
visualizer.print_current_errors(epoch, epoch_iter, errors, t)
if opt.display_id > 0:
visualizer.plot_current_errors(epoch, float(epoch_iter)/dataset_size, opt, errors)
if total_steps % opt.save_latest_freq == 0:
print('saving the latest model (epoch %d, total_steps %d)' %
(epoch, total_steps))
model.save('latest')
if epoch % opt.save_epoch_freq == 0:
print('saving the model at the end of epoch %d, iters %d' %
(epoch, total_steps))
model.save('latest')
model.save(epoch)
print('End of epoch %d / %d \t Time Taken: %d sec' %
(epoch, opt.niter + opt.niter_decay, time.time() - epoch_start_time))
if epoch > opt.niter:
model.update_learning_rate()
npImg1 = cv2.imread("einstein.png")
img1 = torch.from_numpy(np.rollaxis(npImg1, 2)).float().unsqueeze(0)/255.0
img2 = torch.rand(img1.size())
if torch.cuda.is_available():
img1 = img1.cuda()
img2 = img2.cuda()
img1 = Variable( img1, requires_grad=False)
img2 = Variable( img2, requires_grad = True)
# Functional: pytorch_ssim.ssim(img1, img2, window_size = 11, size_average = True)
ssim_value = pytorch_ssim.ssim(img1, img2).data[0]
print("Initial ssim:", ssim_value)
# Module: pytorch_ssim.SSIM(window_size = 11, size_average = True)
ssim_loss = pytorch_ssim.SSIM()
optimizer = optim.Adam([img2], lr=0.01)
while ssim_value < 0.95:
optimizer.zero_grad()
ssim_out = -ssim_loss(img1, img2)
ssim_value = - ssim_out.data[0]
print(ssim_value)
ssim_out.backward()
optimizer.step()
