forked from mrq/DL-Art-School
595 lines
29 KiB
Python
595 lines
29 KiB
Python
import logging
|
|
from collections import OrderedDict
|
|
import torch
|
|
import torch.nn as nn
|
|
from torch.nn.parallel import DataParallel, DistributedDataParallel
|
|
import models.networks as networks
|
|
import models.lr_scheduler as lr_scheduler
|
|
from models.base_model import BaseModel
|
|
from models.loss import GANLoss
|
|
from apex import amp
|
|
import torch.nn.functional as F
|
|
import glob
|
|
import random
|
|
|
|
import torchvision.utils as utils
|
|
import os
|
|
|
|
logger = logging.getLogger('base')
|
|
|
|
|
|
class SRGANModel(BaseModel):
|
|
def __init__(self, opt):
|
|
super(SRGANModel, self).__init__(opt)
|
|
if opt['dist']:
|
|
self.rank = torch.distributed.get_rank()
|
|
else:
|
|
self.rank = -1 # non dist training
|
|
train_opt = opt['train']
|
|
|
|
# define networks and load pretrained models
|
|
self.netG = networks.define_G(opt).to(self.device)
|
|
if self.is_train:
|
|
self.netD = networks.define_D(opt).to(self.device)
|
|
|
|
if 'network_C' in opt.keys():
|
|
self.netC = networks.define_G(opt, net_key='network_C').to(self.device)
|
|
# The corruptor net is fixed. Lock 'her down.
|
|
self.netC.eval()
|
|
for p in self.netC.parameters():
|
|
p.requires_grad = True
|
|
else:
|
|
self.netC = None
|
|
|
|
# define losses, optimizer and scheduler
|
|
if self.is_train:
|
|
self.mega_batch_factor = train_opt['mega_batch_factor']
|
|
if self.mega_batch_factor is None:
|
|
self.mega_batch_factor = 1
|
|
# G pixel loss
|
|
if train_opt['pixel_weight'] > 0:
|
|
l_pix_type = train_opt['pixel_criterion']
|
|
if l_pix_type == 'l1':
|
|
self.cri_pix = nn.L1Loss().to(self.device)
|
|
elif l_pix_type == 'l2':
|
|
self.cri_pix = nn.MSELoss().to(self.device)
|
|
else:
|
|
raise NotImplementedError('Loss type [{:s}] not recognized.'.format(l_pix_type))
|
|
self.l_pix_w = train_opt['pixel_weight']
|
|
else:
|
|
logger.info('Remove pixel loss.')
|
|
self.cri_pix = None
|
|
|
|
# G feature loss
|
|
if train_opt['feature_weight'] > 0:
|
|
l_fea_type = train_opt['feature_criterion']
|
|
if l_fea_type == 'l1':
|
|
self.cri_fea = nn.L1Loss().to(self.device)
|
|
elif l_fea_type == 'l2':
|
|
self.cri_fea = nn.MSELoss().to(self.device)
|
|
else:
|
|
raise NotImplementedError('Loss type [{:s}] not recognized.'.format(l_fea_type))
|
|
self.l_fea_w = train_opt['feature_weight']
|
|
self.l_fea_w_decay = train_opt['feature_weight_decay']
|
|
self.l_fea_w_decay_steps = train_opt['feature_weight_decay_steps']
|
|
self.l_fea_w_minimum = train_opt['feature_weight_minimum']
|
|
else:
|
|
logger.info('Remove feature loss.')
|
|
self.cri_fea = None
|
|
if self.cri_fea: # load VGG perceptual loss
|
|
self.netF = networks.define_F(opt, use_bn=False).to(self.device)
|
|
if opt['dist']:
|
|
pass # do not need to use DistributedDataParallel for netF
|
|
else:
|
|
self.netF = DataParallel(self.netF)
|
|
|
|
# GD gan loss
|
|
self.cri_gan = GANLoss(train_opt['gan_type'], 1.0, 0.0).to(self.device)
|
|
self.l_gan_w = train_opt['gan_weight']
|
|
# D_update_ratio and D_init_iters
|
|
self.D_update_ratio = train_opt['D_update_ratio'] if train_opt['D_update_ratio'] else 1
|
|
self.D_init_iters = train_opt['D_init_iters'] if train_opt['D_init_iters'] else 0
|
|
self.D_noise_theta = train_opt['D_noise_theta_init'] if train_opt['D_noise_theta_init'] else 0
|
|
self.D_noise_final = train_opt['D_noise_final_it'] if train_opt['D_noise_final_it'] else 0
|
|
self.D_noise_theta_floor = train_opt['D_noise_theta_floor'] if train_opt['D_noise_theta_floor'] else 0
|
|
self.corruptor_swapout_steps = train_opt['corruptor_swapout_steps'] if train_opt['corruptor_swapout_steps'] else 500
|
|
self.corruptor_usage_prob = train_opt['corruptor_usage_probability'] if train_opt['corruptor_usage_probability'] else .5
|
|
|
|
# optimizers
|
|
# G
|
|
wd_G = train_opt['weight_decay_G'] if train_opt['weight_decay_G'] else 0
|
|
optim_params = []
|
|
for k, v in self.netG.named_parameters(): # can optimize for a part of the model
|
|
if v.requires_grad:
|
|
optim_params.append(v)
|
|
else:
|
|
if self.rank <= 0:
|
|
logger.warning('Params [{:s}] will not optimize.'.format(k))
|
|
self.optimizer_G = torch.optim.Adam(optim_params, lr=train_opt['lr_G'],
|
|
weight_decay=wd_G,
|
|
betas=(train_opt['beta1_G'], train_opt['beta2_G']))
|
|
self.optimizers.append(self.optimizer_G)
|
|
# D
|
|
wd_D = train_opt['weight_decay_D'] if train_opt['weight_decay_D'] else 0
|
|
self.optimizer_D = torch.optim.Adam(self.netD.parameters(), lr=train_opt['lr_D'],
|
|
weight_decay=wd_D,
|
|
betas=(train_opt['beta1_D'], train_opt['beta2_D']))
|
|
self.optimizers.append(self.optimizer_D)
|
|
|
|
# AMP
|
|
[self.netG, self.netD], [self.optimizer_G, self.optimizer_D] = \
|
|
amp.initialize([self.netG, self.netD], [self.optimizer_G, self.optimizer_D], opt_level=self.amp_level, num_losses=3)
|
|
|
|
# DataParallel
|
|
if opt['dist']:
|
|
self.netG = DistributedDataParallel(self.netG, device_ids=[torch.cuda.current_device()])
|
|
else:
|
|
self.netG = DataParallel(self.netG)
|
|
if self.is_train:
|
|
if opt['dist']:
|
|
self.netD = DistributedDataParallel(self.netD,
|
|
device_ids=[torch.cuda.current_device()])
|
|
else:
|
|
self.netD = DataParallel(self.netD)
|
|
self.netG.train()
|
|
self.netD.train()
|
|
|
|
# schedulers
|
|
if train_opt['lr_scheme'] == 'MultiStepLR':
|
|
for optimizer in self.optimizers:
|
|
self.schedulers.append(
|
|
lr_scheduler.MultiStepLR_Restart(optimizer, train_opt['lr_steps'],
|
|
restarts=train_opt['restarts'],
|
|
weights=train_opt['restart_weights'],
|
|
gamma=train_opt['lr_gamma'],
|
|
clear_state=train_opt['clear_state'],
|
|
force_lr=train_opt['force_lr']))
|
|
elif train_opt['lr_scheme'] == 'CosineAnnealingLR_Restart':
|
|
for optimizer in self.optimizers:
|
|
self.schedulers.append(
|
|
lr_scheduler.CosineAnnealingLR_Restart(
|
|
optimizer, train_opt['T_period'], eta_min=train_opt['eta_min'],
|
|
restarts=train_opt['restarts'], weights=train_opt['restart_weights']))
|
|
else:
|
|
raise NotImplementedError('MultiStepLR learning rate scheme is enough.')
|
|
|
|
self.log_dict = OrderedDict()
|
|
|
|
# Swapout params
|
|
self.swapout_G_freq = train_opt['swapout_G_freq'] if train_opt['swapout_G_freq'] else 0
|
|
self.swapout_G_duration = 0
|
|
self.swapout_D_freq = train_opt['swapout_D_freq'] if train_opt['swapout_D_freq'] else 0
|
|
self.swapout_D_duration = 0
|
|
self.swapout_duration = train_opt['swapout_duration'] if train_opt['swapout_duration'] else 0
|
|
|
|
self.print_network() # print network
|
|
self.load() # load G and D if needed
|
|
self.load_random_corruptor()
|
|
|
|
def feed_data(self, data, need_GT=True):
|
|
_profile = True
|
|
if _profile:
|
|
from time import time
|
|
_t = time()
|
|
|
|
# Corrupt the data with the given corruptor, if specified.
|
|
self.fed_LQ = data['LQ'].to(self.device)
|
|
if self.netC and random.random() < self.corruptor_usage_prob:
|
|
with torch.no_grad():
|
|
corrupted_L = self.netC(self.fed_LQ)[0].detach()
|
|
else:
|
|
corrupted_L = self.fed_LQ
|
|
|
|
self.var_L = torch.chunk(corrupted_L, chunks=self.mega_batch_factor, dim=0)
|
|
if need_GT:
|
|
self.var_H = [t.to(self.device) for t in torch.chunk(data['GT'], chunks=self.mega_batch_factor, dim=0)]
|
|
input_ref = data['ref'] if 'ref' in data else data['GT']
|
|
self.var_ref = [t.to(self.device) for t in torch.chunk(input_ref, chunks=self.mega_batch_factor, dim=0)]
|
|
self.pix = [t.to(self.device) for t in torch.chunk(data['PIX'], chunks=self.mega_batch_factor, dim=0)]
|
|
|
|
def optimize_parameters(self, step):
|
|
_profile = False
|
|
if _profile:
|
|
from time import time
|
|
_t = time()
|
|
|
|
# Some generators have variants depending on the current step.
|
|
if hasattr(self.netG.module, "update_for_step"):
|
|
self.netG.module.update_for_step(step, os.path.join(self.opt['path']['models'], ".."))
|
|
|
|
# G
|
|
for p in self.netD.parameters():
|
|
p.requires_grad = False
|
|
|
|
if step > self.D_init_iters:
|
|
self.optimizer_G.zero_grad()
|
|
|
|
self.swapout_D(step)
|
|
self.swapout_G(step)
|
|
|
|
# Turning off G-grad is required to enable mega-batching and D_update_ratio to work together for some reason.
|
|
if step % self.D_update_ratio == 0 and step > self.D_init_iters:
|
|
for p in self.netG.parameters():
|
|
p.requires_grad = True
|
|
else:
|
|
for p in self.netG.parameters():
|
|
p.requires_grad = False
|
|
|
|
# Calculate a standard deviation for the gaussian noise to be applied to the discriminator, termed noise-theta.
|
|
if self.D_noise_final == 0:
|
|
noise_theta = 0
|
|
else:
|
|
noise_theta = (self.D_noise_theta - self.D_noise_theta_floor) * (self.D_noise_final - min(step, self.D_noise_final)) / self.D_noise_final + self.D_noise_theta_floor
|
|
|
|
if _profile:
|
|
print("Misc setup %f" % (time() - _t,))
|
|
_t = time()
|
|
|
|
self.fake_GenOut = []
|
|
var_ref_skips = []
|
|
for var_L, var_H, var_ref, pix in zip(self.var_L, self.var_H, self.var_ref, self.pix):
|
|
#from utils import gpu_mem_track
|
|
#import inspect
|
|
#gpu_tracker = gpu_mem_track.MemTracker(inspect.currentframe())
|
|
#gpu_tracker.track()
|
|
fake_GenOut = self.netG(var_L)
|
|
#gpu_tracker.track()
|
|
|
|
if _profile:
|
|
print("Gen forward %f" % (time() - _t,))
|
|
_t = time()
|
|
|
|
# Extract the image output. For generators that output skip-through connections, the master output is always
|
|
# the first element of the tuple.
|
|
if isinstance(fake_GenOut, tuple):
|
|
gen_img = fake_GenOut[0]
|
|
# The following line detaches all generator outputs that are not None.
|
|
self.fake_GenOut.append(tuple([(x.detach() if x is not None else None) for x in list(fake_GenOut)]))
|
|
var_ref = (var_ref,) + self.create_artificial_skips(var_H)
|
|
else:
|
|
gen_img = fake_GenOut
|
|
self.fake_GenOut.append(fake_GenOut.detach())
|
|
var_ref_skips.append(var_ref)
|
|
|
|
l_g_total = 0
|
|
if step % self.D_update_ratio == 0 and step > self.D_init_iters:
|
|
if self.cri_pix: # pixel loss
|
|
l_g_pix = self.l_pix_w * self.cri_pix(gen_img, pix)
|
|
l_g_total += l_g_pix
|
|
if self.cri_fea: # feature loss
|
|
real_fea = self.netF(pix).detach()
|
|
fake_fea = self.netF(gen_img)
|
|
l_g_fea = self.l_fea_w * self.cri_fea(fake_fea, real_fea)
|
|
l_g_total += l_g_fea
|
|
|
|
if _profile:
|
|
print("Fea forward %f" % (time() - _t,))
|
|
_t = time()
|
|
|
|
# Decay the influence of the feature loss. As the model trains, the GAN will play a stronger role
|
|
# in the resultant image.
|
|
if step % self.l_fea_w_decay_steps == 0:
|
|
self.l_fea_w = max(self.l_fea_w_minimum, self.l_fea_w * self.l_fea_w_decay)
|
|
|
|
if self.l_gan_w > 0:
|
|
if self.opt['train']['gan_type'] == 'gan':
|
|
pred_g_fake = self.netD(fake_GenOut)
|
|
l_g_gan = self.l_gan_w * self.cri_gan(pred_g_fake, True)
|
|
elif self.opt['train']['gan_type'] == 'ragan':
|
|
pred_d_real = self.netD(var_ref).detach()
|
|
pred_g_fake = self.netD(fake_GenOut)
|
|
l_g_gan = self.l_gan_w * (
|
|
self.cri_gan(pred_d_real - torch.mean(pred_g_fake), False) +
|
|
self.cri_gan(pred_g_fake - torch.mean(pred_d_real), True)) / 2
|
|
l_g_total += l_g_gan
|
|
|
|
# Scale the loss down by the batch factor.
|
|
l_g_total = l_g_total / self.mega_batch_factor
|
|
|
|
with amp.scale_loss(l_g_total, self.optimizer_G, loss_id=0) as l_g_total_scaled:
|
|
l_g_total_scaled.backward()
|
|
|
|
if _profile:
|
|
print("Gen backward %f" % (time() - _t,))
|
|
_t = time()
|
|
|
|
self.optimizer_G.step()
|
|
|
|
if _profile:
|
|
print("Gen step %f" % (time() - _t,))
|
|
_t = time()
|
|
|
|
# D
|
|
if self.l_gan_w > 0:
|
|
for p in self.netD.parameters():
|
|
p.requires_grad = True
|
|
|
|
noise = torch.randn_like(var_ref[0]) * noise_theta
|
|
noise.to(self.device)
|
|
self.optimizer_D.zero_grad()
|
|
for var_L, var_H, var_ref, pix in zip(self.var_L, self.var_H, var_ref_skips, self.pix):
|
|
# Re-compute generator outputs (post-update).
|
|
with torch.no_grad():
|
|
fake_H = self.netG(var_L)
|
|
# The following line detaches all generator outputs that are not None.
|
|
fake_H = tuple([(x.detach() if x is not None else None) for x in list(fake_H)])
|
|
|
|
if _profile:
|
|
print("Gen forward for disc %f" % (time() - _t,))
|
|
_t = time()
|
|
|
|
# Apply noise to the inputs to slow discriminator convergence.
|
|
var_ref = (var_ref[0] + noise,) + var_ref[1:]
|
|
fake_H = (fake_H[0] + noise,) + fake_H[1:]
|
|
if self.opt['train']['gan_type'] == 'gan':
|
|
# need to forward and backward separately, since batch norm statistics differ
|
|
# real
|
|
pred_d_real = self.netD(var_ref)
|
|
l_d_real = self.cri_gan(pred_d_real, True) / self.mega_batch_factor
|
|
with amp.scale_loss(l_d_real, self.optimizer_D, loss_id=2) as l_d_real_scaled:
|
|
l_d_real_scaled.backward()
|
|
# fake
|
|
pred_d_fake = self.netD(fake_H)
|
|
l_d_fake = self.cri_gan(pred_d_fake, False) / self.mega_batch_factor
|
|
with amp.scale_loss(l_d_fake, self.optimizer_D, loss_id=1) as l_d_fake_scaled:
|
|
l_d_fake_scaled.backward()
|
|
elif self.opt['train']['gan_type'] == 'ragan':
|
|
# pred_d_real = self.netD(var_ref)
|
|
# pred_d_fake = self.netD(fake_H.detach()) # detach to avoid BP to G
|
|
# l_d_real = self.cri_gan(pred_d_real - torch.mean(pred_d_fake), True)
|
|
# l_d_fake = self.cri_gan(pred_d_fake - torch.mean(pred_d_real), False)
|
|
# l_d_total = (l_d_real + l_d_fake) / 2
|
|
# l_d_total.backward()
|
|
pred_d_fake = self.netD(fake_H).detach()
|
|
pred_d_real = self.netD(var_ref)
|
|
|
|
if _profile:
|
|
print("Double disc forward (RAGAN) %f" % (time() - _t,))
|
|
_t = time()
|
|
|
|
l_d_real = self.cri_gan(pred_d_real - torch.mean(pred_d_fake), True) * 0.5 / self.mega_batch_factor
|
|
with amp.scale_loss(l_d_real, self.optimizer_D, loss_id=2) as l_d_real_scaled:
|
|
l_d_real_scaled.backward()
|
|
|
|
if _profile:
|
|
print("Disc backward 1 (RAGAN) %f" % (time() - _t,))
|
|
_t = time()
|
|
|
|
pred_d_fake = self.netD(fake_H)
|
|
l_d_fake = self.cri_gan(pred_d_fake - torch.mean(pred_d_real.detach()), False) * 0.5 / self.mega_batch_factor
|
|
with amp.scale_loss(l_d_fake, self.optimizer_D, loss_id=1) as l_d_fake_scaled:
|
|
l_d_fake_scaled.backward()
|
|
|
|
if _profile:
|
|
print("Disc forward/backward 2 (RAGAN) %f" % (time() - _t,))
|
|
_t = time()
|
|
self.optimizer_D.step()
|
|
|
|
if _profile:
|
|
print("Disc step %f" % (time() - _t,))
|
|
_t = time()
|
|
|
|
# Log sample images from first microbatch.
|
|
if step % 50 == 0:
|
|
sample_save_path = os.path.join(self.opt['path']['models'], "..", "temp")
|
|
os.makedirs(os.path.join(sample_save_path, "hr"), exist_ok=True)
|
|
os.makedirs(os.path.join(sample_save_path, "lr"), exist_ok=True)
|
|
os.makedirs(os.path.join(sample_save_path, "lr_precorrupt"), exist_ok=True)
|
|
os.makedirs(os.path.join(sample_save_path, "gen"), exist_ok=True)
|
|
os.makedirs(os.path.join(sample_save_path, "pix"), exist_ok=True)
|
|
multi_gen = False
|
|
if isinstance(self.fake_GenOut[0], tuple):
|
|
os.makedirs(os.path.join(sample_save_path, "genlr"), exist_ok=True)
|
|
os.makedirs(os.path.join(sample_save_path, "genmr"), exist_ok=True)
|
|
os.makedirs(os.path.join(sample_save_path, "ref"), exist_ok=True)
|
|
multi_gen = True
|
|
|
|
# fed_LQ is not chunked.
|
|
utils.save_image(self.fed_LQ.cpu().detach(), os.path.join(sample_save_path, "lr_precorrupt", "%05i.png" % (step,)))
|
|
for i in range(self.mega_batch_factor):
|
|
utils.save_image(self.var_H[i].cpu().detach(), os.path.join(sample_save_path, "hr", "%05i_%02i.png" % (step, i)))
|
|
utils.save_image(self.var_L[i].cpu().detach(), os.path.join(sample_save_path, "lr", "%05i_%02i.png" % (step, i)))
|
|
utils.save_image(self.pix[i].cpu().detach(), os.path.join(sample_save_path, "pix", "%05i_%02i.png" % (step, i)))
|
|
if multi_gen:
|
|
utils.save_image(self.fake_GenOut[i][0].cpu().detach(), os.path.join(sample_save_path, "gen", "%05i_%02i.png" % (step, i)))
|
|
if len(self.fake_GenOut[i]) > 1:
|
|
if self.fake_GenOut[i][1] is not None:
|
|
utils.save_image(self.fake_GenOut[i][1].cpu().detach(), os.path.join(sample_save_path, "genmr", "%05i_%02i.png" % (step, i)))
|
|
if self.fake_GenOut[i][2] is not None:
|
|
utils.save_image(self.fake_GenOut[i][2].cpu().detach(), os.path.join(sample_save_path, "genlr", "%05i_%02i.png" % (step, i)))
|
|
utils.save_image(var_ref_skips[i][0].cpu().detach(), os.path.join(sample_save_path, "ref", "hi_%05i_%02i.png" % (step, i)))
|
|
utils.save_image(var_ref_skips[i][1].cpu().detach(), os.path.join(sample_save_path, "ref", "med_%05i_%02i.png" % (step, i)))
|
|
utils.save_image(var_ref_skips[i][2].cpu().detach(), os.path.join(sample_save_path, "ref", "low_%05i_%02i.png" % (step, i)))
|
|
else:
|
|
utils.save_image(self.fake_GenOut[i].cpu().detach(), os.path.join(sample_save_path, "gen", "%05i_%02i.png" % (step, i)))
|
|
|
|
# Log metrics
|
|
if step % self.D_update_ratio == 0 and step > self.D_init_iters:
|
|
if self.cri_pix:
|
|
self.add_log_entry('l_g_pix', l_g_pix.item())
|
|
if self.cri_fea:
|
|
self.add_log_entry('feature_weight', self.l_fea_w)
|
|
self.add_log_entry('l_g_fea', l_g_fea.item())
|
|
if self.l_gan_w > 0:
|
|
self.add_log_entry('l_g_gan', l_g_gan.item())
|
|
self.add_log_entry('l_g_total', l_g_total.item() * self.mega_batch_factor)
|
|
if self.l_gan_w > 0:
|
|
self.add_log_entry('l_d_real', l_d_real.item() * self.mega_batch_factor)
|
|
self.add_log_entry('l_d_fake', l_d_fake.item() * self.mega_batch_factor)
|
|
self.add_log_entry('D_fake', torch.mean(pred_d_fake.detach()))
|
|
self.add_log_entry('D_diff', torch.mean(pred_d_fake) - torch.mean(pred_d_real))
|
|
self.add_log_entry('noise_theta', noise_theta)
|
|
|
|
if step % self.corruptor_swapout_steps == 0 and step > 0:
|
|
self.load_random_corruptor()
|
|
|
|
# Allows the log to serve as an easy-to-use rotating buffer.
|
|
def add_log_entry(self, key, value):
|
|
key_it = "%s_it" % (key,)
|
|
log_rotating_buffer_size = 50
|
|
if key not in self.log_dict.keys():
|
|
self.log_dict[key] = []
|
|
self.log_dict[key_it] = 0
|
|
if len(self.log_dict[key]) < log_rotating_buffer_size:
|
|
self.log_dict[key].append(value)
|
|
else:
|
|
self.log_dict[key][self.log_dict[key_it] % log_rotating_buffer_size] = value
|
|
self.log_dict[key_it] += 1
|
|
|
|
|
|
def create_artificial_skips(self, truth_img):
|
|
med_skip = F.interpolate(truth_img, scale_factor=.5)
|
|
lo_skip = F.interpolate(truth_img, scale_factor=.25)
|
|
return med_skip, lo_skip
|
|
|
|
def pick_rand_prev_model(self, model_suffix):
|
|
previous_models = glob.glob(os.path.join(self.opt['path']['models'], "*_%s.pth" % (model_suffix,)))
|
|
if len(previous_models) <= 1:
|
|
return None
|
|
# Just a note: this intentionally includes the swap model in the list of possibilities.
|
|
return previous_models[random.randint(0, len(previous_models)-1)]
|
|
|
|
def compute_fea_loss(self, real, fake):
|
|
with torch.no_grad():
|
|
real = real.unsqueeze(dim=0)
|
|
fake = fake.unsqueeze(dim=0)
|
|
real_fea = self.netF(real).detach()
|
|
fake_fea = self.netF(fake)
|
|
return self.cri_fea(fake_fea, real_fea).item()
|
|
|
|
# Called before verification/checkpoint to ensure we're using the real models and not a swapout variant.
|
|
def force_restore_swapout(self):
|
|
if self.swapout_D_duration > 0:
|
|
logger.info("Swapping back to current D model: %s" % (self.stashed_D,))
|
|
self.load_network(self.stashed_D, self.netD, self.opt['path']['strict_load'])
|
|
self.stashed_D = None
|
|
self.swapout_D_duration = 0
|
|
if self.swapout_G_duration > 0:
|
|
logger.info("Swapping back to current G model: %s" % (self.stashed_G,))
|
|
self.load_network(self.stashed_G, self.netG, self.opt['path']['strict_load'])
|
|
self.stashed_G = None
|
|
self.swapout_G_duration = 0
|
|
|
|
def swapout_D(self, step):
|
|
if self.swapout_D_duration > 0:
|
|
self.swapout_D_duration -= 1
|
|
if self.swapout_D_duration == 0:
|
|
# Swap back.
|
|
logger.info("Swapping back to current D model: %s" % (self.stashed_D,))
|
|
self.load_network(self.stashed_D, self.netD, self.opt['path']['strict_load'])
|
|
self.stashed_D = None
|
|
elif self.swapout_D_freq != 0 and step % self.swapout_D_freq == 0:
|
|
swapped_model = self.pick_rand_prev_model('D')
|
|
if swapped_model is not None:
|
|
logger.info("Swapping to previous D model: %s" % (swapped_model,))
|
|
self.stashed_D = self.save_network(self.netD, 'D', 'swap_model')
|
|
self.load_network(swapped_model, self.netD, self.opt['path']['strict_load'])
|
|
self.swapout_D_duration = self.swapout_duration
|
|
|
|
def swapout_G(self, step):
|
|
if self.swapout_G_duration > 0:
|
|
self.swapout_G_duration -= 1
|
|
if self.swapout_G_duration == 0:
|
|
# Swap back.
|
|
logger.info("Swapping back to current G model: %s" % (self.stashed_G,))
|
|
self.load_network(self.stashed_G, self.netG, self.opt['path']['strict_load'])
|
|
self.stashed_G = None
|
|
elif self.swapout_G_freq != 0 and step % self.swapout_G_freq == 0:
|
|
swapped_model = self.pick_rand_prev_model('G')
|
|
if swapped_model is not None:
|
|
logger.info("Swapping to previous G model: %s" % (swapped_model,))
|
|
self.stashed_G = self.save_network(self.netG, 'G', 'swap_model')
|
|
self.load_network(swapped_model, self.netG, self.opt['path']['strict_load'])
|
|
self.swapout_G_duration = self.swapout_duration
|
|
|
|
def test(self):
|
|
self.netG.eval()
|
|
with torch.no_grad():
|
|
self.fake_GenOut = [self.netG(self.var_L[0])]
|
|
self.netG.train()
|
|
|
|
# Fetches a summary of the log.
|
|
def get_current_log(self, step):
|
|
return_log = {}
|
|
for k in self.log_dict.keys():
|
|
if not isinstance(self.log_dict[k], list):
|
|
continue
|
|
return_log[k] = sum(self.log_dict[k]) / len(self.log_dict[k])
|
|
|
|
# Some generators can do their own metric logging.
|
|
if hasattr(self.netG.module, "get_debug_values"):
|
|
return_log.update(self.netG.module.get_debug_values(step))
|
|
|
|
return return_log
|
|
|
|
def get_current_visuals(self, need_GT=True):
|
|
out_dict = OrderedDict()
|
|
out_dict['LQ'] = self.var_L[0].detach().float().cpu()
|
|
gen_batch = self.fake_GenOut[0]
|
|
if isinstance(gen_batch, tuple):
|
|
gen_batch = gen_batch[0]
|
|
out_dict['rlt'] = gen_batch.detach().float().cpu()
|
|
if need_GT:
|
|
out_dict['GT'] = self.var_H[0].detach().float().cpu()
|
|
return out_dict
|
|
|
|
def print_network(self):
|
|
# Generator
|
|
s, n = self.get_network_description(self.netG)
|
|
if isinstance(self.netG, nn.DataParallel) or isinstance(self.netG, DistributedDataParallel):
|
|
net_struc_str = '{} - {}'.format(self.netG.__class__.__name__,
|
|
self.netG.module.__class__.__name__)
|
|
else:
|
|
net_struc_str = '{}'.format(self.netG.__class__.__name__)
|
|
if self.rank <= 0:
|
|
logger.info('Network G structure: {}, with parameters: {:,d}'.format(net_struc_str, n))
|
|
logger.info(s)
|
|
if self.is_train:
|
|
# Discriminator
|
|
s, n = self.get_network_description(self.netD)
|
|
if isinstance(self.netD, nn.DataParallel) or isinstance(self.netD,
|
|
DistributedDataParallel):
|
|
net_struc_str = '{} - {}'.format(self.netD.__class__.__name__,
|
|
self.netD.module.__class__.__name__)
|
|
else:
|
|
net_struc_str = '{}'.format(self.netD.__class__.__name__)
|
|
if self.rank <= 0:
|
|
logger.info('Network D structure: {}, with parameters: {:,d}'.format(
|
|
net_struc_str, n))
|
|
logger.info(s)
|
|
|
|
if self.cri_fea: # F, Perceptual Network
|
|
s, n = self.get_network_description(self.netF)
|
|
if isinstance(self.netF, nn.DataParallel) or isinstance(
|
|
self.netF, DistributedDataParallel):
|
|
net_struc_str = '{} - {}'.format(self.netF.__class__.__name__,
|
|
self.netF.module.__class__.__name__)
|
|
else:
|
|
net_struc_str = '{}'.format(self.netF.__class__.__name__)
|
|
if self.rank <= 0:
|
|
logger.info('Network F structure: {}, with parameters: {:,d}'.format(
|
|
net_struc_str, n))
|
|
logger.info(s)
|
|
|
|
def load(self):
|
|
load_path_G = self.opt['path']['pretrain_model_G']
|
|
if load_path_G is not None:
|
|
logger.info('Loading model for G [{:s}] ...'.format(load_path_G))
|
|
self.load_network(load_path_G, self.netG, self.opt['path']['strict_load'])
|
|
load_path_D = self.opt['path']['pretrain_model_D']
|
|
if self.opt['is_train'] and load_path_D is not None:
|
|
logger.info('Loading model for D [{:s}] ...'.format(load_path_D))
|
|
self.load_network(load_path_D, self.netD, self.opt['path']['strict_load'])
|
|
|
|
def load_random_corruptor(self):
|
|
if self.netC is None:
|
|
return
|
|
corruptor_files = glob.glob(os.path.join(self.opt['path']['pretrained_corruptors_dir'], "*.pth"))
|
|
corruptor_to_load = corruptor_files[random.randint(0, len(corruptor_files)-1)]
|
|
logger.info('Swapping corruptor to: %s' % (corruptor_to_load,))
|
|
self.load_network(corruptor_to_load, self.netC, self.opt['path']['strict_load'])
|
|
|
|
def save(self, iter_step):
|
|
self.save_network(self.netG, 'G', iter_step)
|
|
self.save_network(self.netD, 'D', iter_step)
|