def dummy_test_config():
d = Config(a=1, b=2)
d.update(a=2, b=3)
d.a = 9
d.update(Config(b=6, f=5))
d.pop('b')
print(d)
def test_config(self):
d = Config(a=1, b=2)
self.assertTrue(hasattr(d, 'a'))
self.assertTrue(hasattr(d, 'b'))
self.assertTrue(hasattr(d, 'non-exist'))
self.assertIs(d.a, 1)
self.assertIs(d.b, 2)
d.update(a=2, b=3)
self.assertIs(d.a, 2)
self.assertIs(d.b, 3)
d.a = 9
self.assertIs(d.a, 9)
d.update(Config(b=6, f=5))
self.assertIs(d.b, 6)
self.assertIs(d.f, 5)
d.pop('b')
self.assertIsNone(d.b)
def query_config(self, config, **kwargs) -> Config:
config = Config(config or {})
config.update(kwargs) # override parameters
self.v.epoch = config.epoch # current epoch
self.v.epochs = config.epochs or 1 # total epochs
self.v.lr = config.lr or 1e-4 # learning rate
self.v.batch_shape = config.batch_shape or [1, -1, -1, -1]
self.v.steps = config.steps or 200
self.v.val_steps = config.val_steps or -1
self.v.lr_schedule = config.lr_schedule
self.v.memory_limit = config.memory_limit
self.v.inference_results_hooks = config.inference_results_hooks or []
self.v.validate_every_n_epoch = config.validate_every_n_epoch or 1
self.v.traced_val = config.traced_val
self.v.ensemble = config.ensemble
self.v.cuda = config.cuda
return self.v
def main():
flags, args = parser.parse_known_args()
opt = Config()
for pair in flags._get_kwargs():
opt.setdefault(*pair)
overwrite_from_env(opt)
data_config_file = Path(flags.data_config)
if not data_config_file.exists():
raise FileNotFoundError("dataset config file doesn't exist!")
for _ext in ('json', 'yaml', 'yml'): # for compat
if opt.parameter:
model_config_file = Path(opt.parameter)
else:
model_config_file = Path(f'par/{BACKEND}/{opt.model}.{_ext}')
if model_config_file.exists():
opt.update(compat_param(Config(str(model_config_file))))
# get model parameters from pre-defined YAML file
model_params = opt.get(opt.model, {})
suppress_opt_by_args(model_params, *args)
opt.update(model_params)
# construct model
model = get_model(opt.model)(**model_params)
if opt.cuda:
model.cuda()
if opt.pretrain:
model.load(opt.pretrain)
root = f'{opt.save_dir}/{opt.model}'
if opt.comment:
root += '_' + opt.comment
root = Path(root)
datasets = load_datasets(data_config_file)
try:
test_datas = [datasets[t.upper()]
for t in opt.test] if opt.test else []
except KeyError:
test_datas = [Config(test=Config(lr=Dataset(*opt.test)), name='infer')]
if opt.video:
test_datas[0].test.lr.use_like_video_()
# enter model executor environment
with model.get_executor(root) as t:
for data in test_datas:
run_benchmark = False if data.test.hr is None else True
if run_benchmark:
ld = Loader(data.test.hr,
data.test.lr,
opt.scale,
threads=opt.threads)
else:
ld = Loader(data.test.hr, data.test.lr, threads=opt.threads)
if opt.channel == 1:
# convert data color space to grayscale
ld.set_color_space('hr', 'L')
ld.set_color_space('lr', 'L')
config = t.query_config(opt)
config.inference_results_hooks = [
save_inference_images(root / data.name, opt.output_index,
opt.auto_rename)
]
if run_benchmark:
t.benchmark(ld, config)
else:
t.infer(ld, config)
if opt.export:
t.export(opt.export)
def main():
flags, args = parser.parse_known_args()
opt = Config() # An EasyDict object
# overwrite flag values into opt object
for pair in flags._get_kwargs():
opt.setdefault(*pair)
# fetch dataset descriptions
data_config_file = Path(opt.data_config)
if not data_config_file.exists():
raise FileNotFoundError("dataset config file doesn't exist!")
for _ext in ('json', 'yaml', 'yml'): # for compat
if opt.parameter:
model_config_file = Path(opt.parameter)
else:
model_config_file = Path(f'par/{BACKEND}/{opt.model}.{_ext}')
if model_config_file.exists():
opt.update(compat_param(Config(str(model_config_file))))
# get model parameters from pre-defined YAML file
model_params = opt.get(opt.model, {})
suppress_opt_by_args(model_params, *args)
opt.update(model_params)
# construct model
model = get_model(opt.model)(**model_params)
if opt.cuda:
model.cuda()
if opt.pretrain:
model.load(opt.pretrain)
root = f'{opt.save_dir}/{opt.model}'
if opt.comment:
root += '_' + opt.comment
dataset = load_datasets(data_config_file, opt.dataset)
# construct data loader for training
lt = Loader(dataset.train.hr,
dataset.train.lr,
opt.scale,
threads=opt.threads)
lt.image_augmentation()
# construct data loader for validating
lv = None
if dataset.val is not None:
lv = Loader(dataset.val.hr,
dataset.val.lr,
opt.scale,
threads=opt.threads)
lt.cropper(RandomCrop(opt.scale))
if opt.traced_val and lv is not None:
lv.cropper(CenterCrop(opt.scale))
elif lv is not None:
lv.cropper(RandomCrop(opt.scale))
if opt.channel == 1:
# convert data color space to grayscale
lt.set_color_space('hr', 'L')
lt.set_color_space('lr', 'L')
if lv is not None:
lv.set_color_space('hr', 'L')
lv.set_color_space('lr', 'L')
# enter model executor environment
with model.get_executor(root) as t:
config = t.query_config(opt)
if opt.lr_decay:
config.lr_schedule = lr_decay(lr=opt.lr, **opt.lr_decay)
t.fit([lt, lv], config)
if opt.export:
t.export(opt.export)
class DRSR(SuperResolution):
def __init__(self,
name='drsr',
n_cb=4,
n_crb=4,
noise_config=None,
weights=(1, 0.5, 0.05, 1e-3),
finetune=2000,
mean_shift=False,
**kwargs):
super(DRSR, self).__init__(**kwargs)
self.name = name
self.n_cb = n_cb
self.n_crb = n_crb
self.weights = weights
self.finetune = finetune
self.mean_shift = mean_shift
self.noise = Config(scale=0, offset=0, penalty=0.7, max=0.2, layers=7)
if isinstance(noise_config, (dict, Config)):
self.noise.update(**noise_config)
if self.noise.type == 'crf':
self.noise.crf = np.load(self.noise.crf)
self.noise.offset /= 255
self.noise.max /= 255
if 'tfrecords' in kwargs:
self.tfr = kwargs['tfrecords']
self._trainer = DrTrainer
def display(self):
# stats = tf.profiler.profile()
# LOG.info("Total parameters: {}".format(stats.total_parameters))
LOG.info("Noisy scaling {}, bias sigma {}".format(
self.noise.scale, self.noise.offset))
LOG.info("Using {}".format(self.trainer))
def _dncnn(self, inputs):
n = self.noise
with tf.variable_scope('Dncnn'):
x = inputs
for _ in range(6):
x = self.bn_relu_conv2d(x, 64, 3)
x = self.conv2d(x, self.channel, 3)
return x
def cascade_block(self,
inputs,
noise,
filters=64,
depth=4,
scope=None,
reuse=None):
def _noise_condition(nc_inputs, layers=2):
with tf.variable_scope(None, 'NCL'):
t = noise
for _ in range(layers - 1):
t = self.relu_conv2d(t, 64, 3)
t = self.conv2d(t, 64, 3)
gamma = tf.reduce_mean(t, [1, 2], keepdims=True)
t = noise
for _ in range(layers - 1):
t = self.relu_conv2d(t, 64, 3)
beta = self.conv2d(t, 64, 3)
return nc_inputs * gamma + beta
def _cond_resblock(cr_inputs, kernel_size):
with tf.variable_scope(None, 'CRB'):
pre_inputs = cr_inputs
cr_inputs = self.relu_conv2d(cr_inputs, filters, kernel_size)
cr_inputs = _noise_condition(cr_inputs)
cr_inputs = self.relu_conv2d(cr_inputs, filters, kernel_size)
cr_inputs = _noise_condition(cr_inputs)
return pre_inputs + cr_inputs
with tf.variable_scope(scope, 'CB', reuse=reuse):
feat = [inputs]
for i in range(depth):
x = _cond_resblock(inputs, 3)
feat.append(x)
inputs = self.conv2d(tf.concat(feat, axis=-1),
filters,
1,
kernel_initializer='he_uniform')
# inputs = self.conv2d(inputs, filters, 3)
return inputs
def _upsample(self, inputs, noise):
x = [self.conv2d(inputs, 64, 7)]
for i in range(self.n_cb):
x += [self.cascade_block(x[i], noise, depth=self.n_crb)]
# bottleneck
df = [
self.conv2d(n, 32, 1, kernel_initializer='he_uniform')
for n in x[:-1]
]
df.append(x[-1])
summary_tensor_image(x[-1], 'last_before_bn')
bottleneck = tf.concat(df, axis=-1, name='bottleneck')
sr = self.upscale(bottleneck, direct_output=False)
summary_tensor_image(sr, 'after_bn')
sr = self.conv2d(sr, self.channel, 3)
return sr, x
def _unet(self, inputs, noise):
with tf.variable_scope('Unet'):
x0 = self.conv2d(inputs, 64, 7)
x1 = self.cascade_block(x0, noise, depth=self.n_crb)
x1s = tf.layers.average_pooling2d(x1, 2, 2)
n1s = tf.layers.average_pooling2d(noise, 2, 2)
x2 = self.cascade_block(x1s, n1s, depth=self.n_crb)
x2s = tf.layers.average_pooling2d(x2, 2, 2)
n2s = tf.layers.average_pooling2d(noise, 4, 4)
x3 = self.cascade_block(x2s, n2s, depth=self.n_crb)
x3u = self.deconv2d(x3, 64, 3, strides=2)
x3u1 = tf.concat([x3u, x1s], -1)
x3u2 = self.conv2d(x3u1, 64, 3)
x4 = self.cascade_block(x3u2, n1s, depth=self.n_crb)
x4u = self.deconv2d(x4, 64, 3, strides=2)
x4u1 = tf.concat([x4u, x0], -1)
x4u2 = self.conv2d(x4u1, 64, 3)
x5 = self.conv2d(x4u2, self.channel, 3)
return x5, None
def _get_noise(self, inputs):
n = self.noise
if n.type == 'gaussian':
sigma = tf.random_uniform([], maxval=n.max)
noise = tf.random_normal(tf.shape(inputs), stddev=sigma)
img = inputs + noise
return img, noise
elif n.type == 'crf':
crf = tf.convert_to_tensor(n.crf['crf'])
icrf = tf.convert_to_tensor(n.crf['icrf'])
i = tf.random_uniform([], 0, crf.shape[0], dtype=tf.int32)
irr = Noise.tf_camera_response_function(inputs, icrf[i], max_val=1)
noise = Noise.tf_gaussian_poisson_noise(irr, max_c=n.max)
img = Noise.tf_camera_response_function(irr + noise,
crf[i],
max_val=1)
return img, img - inputs
else:
raise TypeError(n.type)
def build_graph(self):
super(DRSR, self).build_graph()
inputs_norm = _normalize(self.inputs_preproc[-1])
labels_norm = _normalize(self.label[-1])
if self.mean_shift:
inputs_norm -= _MEAN / 255
labels_norm -= _MEAN / 255
n = self.noise
inputs_noise, noise = self._get_noise(inputs_norm)
nn = self._upsample
with tf.variable_scope('Offset'):
x = inputs_norm
for _ in range(n.layers):
x = self.relu_conv2d(
x,
64,
3,
kernel_initializer=tf.initializers.random_normal(
stddev=0.01))
offset = self.conv2d(
x,
self.channel,
3,
kernel_initializer=tf.initializers.random_normal(stddev=0.01))
offset *= Noise.tf_gaussian_noise(offset, n.offset2)
with tf.variable_scope(self.name):
zero = self._dncnn(inputs_norm)
zero_shift = zero + offset * n.scale + \
Noise.tf_gaussian_noise(zero, n.offset)
clean = nn(inputs_norm, zero_shift)
with tf.variable_scope(self.name, reuse=True):
noisy = self._dncnn(inputs_noise)
dirty = nn(inputs_noise, noisy)
if self.finetune == -1:
with tf.variable_scope(self.name, reuse=True):
s = 2
inputs_s2 = tf.layers.average_pooling2d(inputs_norm, s, s)
zero_s2 = self._dncnn(inputs_s2)
zero_shift_s2 = zero_s2 + Noise.tf_gaussian_noise(
zero_s2, n.offset)
clean_s2 = nn(inputs_s2, zero_shift_s2)
noise_s2 = inputs_norm - clean_s2[0]
with tf.variable_scope('Fine'):
x = self.conv2d(inputs_norm, 64, 3)
x = self.cascade_block(x, noise_s2, depth=6)
x = self.conv2d(x, self.channel, 3)
clean_fine = [x, x]
self.outputs.append(_denormalize(clean_s2[0]))
self.outputs.append(_denormalize(clean_fine[0]))
else:
self.outputs.append(_denormalize(tf.abs(zero)))
self.outputs.append(_denormalize(clean[0]))
if self.mean_shift:
self.outputs = [x + _MEAN for x in self.outputs]
def loss1():
l1_with_noise = tf.losses.absolute_difference(
dirty[0], labels_norm)
l1_fine_tune = tf.losses.absolute_difference(clean[0], labels_norm)
penalty = tf.clip_by_value(2 * tf.ceil(tf.nn.relu(noisy - noise)),
0, 1)
penalty = tf.abs(self.noise.penalty - penalty)
noise_identity = penalty * tf.squared_difference(noisy, noise)
noise_identity = tf.reduce_mean(noise_identity)
noise_tv = tf.reduce_mean(tf.image.total_variation(noisy))
# tv clamp
l_tv_max = tf.nn.relu(noise_tv - 1000)**2
l_tv_min = tf.nn.relu(100 - noise_tv)**2
noise_tv += l_tv_max + l_tv_min
loss = tf.stack([l1_with_noise, noise_identity, noise_tv])
loss *= self.weights[:-1]
loss = tf.reduce_sum(loss)
self.train_metric['l1/noisy'] = l1_with_noise
self.train_metric['l1/finet'] = l1_fine_tune
self.train_metric['ni'] = noise_identity
self.train_metric['nt'] = noise_tv
update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS)
var_g = tf.trainable_variables(self.name)
var_o = tf.trainable_variables('Offset')
with tf.control_dependencies(update_ops):
op = tf.train.AdamOptimizer(self.learning_rate, 0.9)
op = op.minimize(loss, self.global_steps, var_list=var_g)
self.loss.append(op)
op = tf.train.AdamOptimizer(self.learning_rate, 0.9)
op = op.minimize(l1_fine_tune,
self.global_steps,
var_list=var_o)
self.loss.append(op)
def loss2():
l1_clean = tf.losses.mean_squared_error(clean[0], labels_norm)
var_g = tf.trainable_variables(self.name)
update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS)
with tf.control_dependencies(update_ops):
op = tf.train.AdamOptimizer(self.learning_rate, 0.9)
op = op.minimize(l1_clean, self.global_steps, var_list=var_g)
self.loss += [op, op]
self.train_metric['l1/tune'] = l1_clean
def loss3():
l1_clean = tf.losses.mean_squared_error(clean_fine[0], labels_norm)
var_f = tf.trainable_variables('Fine')
update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS)
with tf.control_dependencies(update_ops):
op = tf.train.AdamOptimizer(self.learning_rate, 0.9)
op = op.minimize(l1_clean, self.global_steps, var_list=var_f)
self.loss += [op, op]
self.train_metric['l1/tune'] = l1_clean
tf.summary.image('hr/coarse', _clip(self.outputs[-2]))
with tf.name_scope('Loss'):
if self.finetune == -1:
loss3()
elif 'DrTrainer' in str(self.trainer):
loss2()
else:
loss1()
self.metrics['psnr1'] = tf.reduce_mean(
tf.image.psnr(self.label[-1], self.outputs[-1], max_val=255))
tf.summary.image('noisy/zero', zero)
def build_loss(self):
pass
def build_summary(self):
super(DRSR, self).build_summary()
tf.summary.image('lr/input', self.inputs[-1])
tf.summary.image('hr/fine', _clip(self.outputs[-1]))
tf.summary.image('hr/label', _clip(self.label[0]))
def build_saver(self):
var_g = tf.global_variables(self.name)
steps = [self.global_steps]
loss = tf.global_variables('Loss')
self.savers.update(drsr_g=tf.train.Saver(var_g, max_to_keep=1),
misc=tf.train.Saver(steps + loss, max_to_keep=1))
if self.finetune == -1:
var_f = tf.global_variables('Fine')
self.savers.update(drsr_f=tf.train.Saver(var_f, max_to_keep=1))
def train_batch(self, feature, label, learning_rate=1e-4, **kwargs):
epochs = kwargs.get('epochs')
if epochs < self.finetune:
loss = self.loss[0]
else:
loss = self.loss[1]
return super(DRSR, self).train_batch(feature,
label,
learning_rate,
loss=loss)
class DRSR(SuperResolution):
def __init__(self, name='drsr_v2', noise_config=None, weights=(1, 10, 1e-5),
level=1, mean_shift=(0, 0, 0), arch=None, auto_shift=None,
**kwargs):
super(DRSR, self).__init__(**kwargs)
self.name = name
self.noise = Config(scale=0, offset=0, penalty=0.5, max=0, layers=7)
if isinstance(noise_config, (dict, Config)):
self.noise.update(**noise_config)
self.noise.crf = np.load(self.noise.crf)
self.noise.offset = to_list(self.noise.offset, 4)
self.noise.offset = [x / 255 for x in self.noise.offset]
self.noise.max /= 255
self.weights = weights
self.level = level
if mean_shift is not None:
self.norm = partial(_normalize, shift=mean_shift)
self.denorm = partial(_denormalize, shift=mean_shift)
self.arch = arch
self.auto = auto_shift
self.to_sum = []
def display(self):
LOG.info(str(self.noise))
def noise_cond(self, inputs, noise, layers, scope='NCL'):
with tf.variable_scope(None, scope):
x = noise
c = inputs.shape[-1]
for _ in range(layers - 1):
x = self.prelu_conv2d(x, 64, 3)
x = self.conv2d(x, c, 3)
gamma = tf.nn.sigmoid(x)
x = noise
for _ in range(layers - 1):
x = self.prelu_conv2d(x, 64, 3)
beta = self.conv2d(x, c, 3)
return inputs * gamma + beta
def cond_rb(self, inputs, noise, scope='CRB'):
with tf.variable_scope(None, scope):
x = self.prelu_conv2d(inputs, 64, 3)
x = self.conv2d(x, 64, 3)
x = self.noise_cond(x, noise, 3)
if inputs.shape[-1] != x.shape[-1]:
sc = self.conv2d(inputs, x.shape[-1], 1,
kernel_initializer='he_uniform')
else:
sc = inputs
return sc + x
def cond_rdb(self, inputs, noise, scope='CRDB'):
with tf.variable_scope(None, scope):
x0 = self.prelu_conv2d(inputs, 64, 3)
x1 = self.prelu_conv2d(tf.concat([inputs, x0], -1), 64, 3)
x2 = self.conv2d(tf.concat([inputs, x0, x1], -1), 64, 3)
x = self.noise_cond(x2, noise, 3)
if inputs.shape[-1] != x.shape[-1]:
sc = self.conv2d(inputs, x.shape[-1], 1,
kernel_initializer='he_uniform')
else:
sc = inputs
return sc + x
def noise_estimate(self, inputs, scope='NoiseEstimator', reuse=None):
n = self.noise
with tf.variable_scope(None, scope, reuse=reuse):
x = inputs
for _ in range(n.layers):
x = self.leaky_conv2d(x, 64, 3)
x = self.conv2d(x, self.channel, 3)
return x
def noise_shift(self, inputs, layers, scope='NoiseShift', reuse=None):
n = self.noise
with tf.variable_scope(None, scope, reuse=reuse):
x = inputs
for _ in range(layers):
x = self.leaky_conv2d(x, 64, 3)
x = self.conv2d(x, self.channel, 3, activation=tf.nn.sigmoid)
return x * Noise.tf_gaussian_noise(inputs, n.max)
def local_net(self, inputs, noise, depth=4, scope='LC'):
with tf.variable_scope(None, scope):
fl = [inputs]
x = inputs
for i in range(depth):
x = self.cond_rb(x, noise)
fl.append(x)
x = tf.concat(fl, axis=-1)
x = self.conv2d(x, 64, 1, kernel_initializer='he_uniform')
return x
def local_net2(self, inputs, noise, depth=4, scope='LC'):
with tf.variable_scope(None, scope):
fl = [inputs]
x = inputs
for i in range(depth):
x = self.cond_rdb(x, noise)
fl.append(x)
x = tf.concat(fl, axis=-1)
x = self.conv2d(x, 64, 1, kernel_initializer='he_uniform')
return x
def global_net(self, inputs, noise, depth=4, scope='GC', reuse=None):
with tf.variable_scope(None, scope, reuse=reuse):
fl = [inputs]
x = inputs
for i in range(depth):
if self.arch == 'concat':
x = cascade_rdn(self, x, depth=3, use_ca=True)
elif self.arch == 'crb':
x = self.local_net(x, noise[i], 4)
else:
x = self.local_net2(x, noise[i], 3)
if self.arch != 'crdb':
fl.append(x)
x = tf.concat(fl, axis=-1)
x = self.conv2d(x, 64, 1, kernel_initializer='he_uniform')
self.to_sum += fl
if self.arch == 'crdb':
x += inputs
if self.auto:
sr = self.upscale(x, direct_output=False, scale=4)
else:
sr = self.upscale(x, direct_output=False)
sr = self.conv2d(sr, self.channel, 3)
return sr, x
def gen_noise(self, inputs, ntype, max1=0.06, max2=0.16):
with tf.name_scope('GenNoise'):
n = self.noise
if ntype == 'gaussian':
noise = Noise.tf_gaussian_noise(inputs, sigma_max=max1,
channel_wise=False)
return noise
elif ntype == 'crf':
crf = tf.convert_to_tensor(n.crf['crf'])
icrf = tf.convert_to_tensor(n.crf['icrf'])
i = tf.random_uniform([], 0, crf.shape[0], dtype=tf.int32)
irr = Noise.tf_camera_response_function(inputs, icrf[i], max_val=1)
noise = Noise.tf_gaussian_poisson_noise(irr, max_c=max1, max_s=max2)
img = Noise.tf_camera_response_function(irr + noise, crf[i], max_val=1)
return img - inputs
else:
raise TypeError(ntype)
def net(self, inputs, level, scale=1, shift=(0, 0, 0, 0), reuse=None):
with tf.variable_scope(self.name, reuse=reuse):
level_outputs = []
level_noise = []
level_inputs = []
for i in range(1, level + 1):
with tf.variable_scope(f'Level{i:1d}'):
noise_hyp = self.noise_estimate(inputs) * scale + \
Noise.tf_gaussian_noise(inputs, self.noise.offset[0])
level_noise.append(noise_hyp)
noise_hyp = [noise_hyp + shift[0],
noise_hyp + shift[1],
noise_hyp + shift[2],
noise_hyp + shift[3]]
if i == 1:
if self.arch == 'concat':
inputs = tf.concat([inputs, noise_hyp[0]], axis=-1)
entry = self.conv2d(inputs, 64, 3)
entry = self.conv2d(entry, 64, 3)
level_inputs.append(entry)
y = self.global_net(level_inputs[-1], noise_hyp, 4)
level_outputs.append(y[0])
level_inputs.append(y[1])
return level_noise, level_outputs
def build_graph(self):
super(DRSR, self).build_graph()
inputs_norm = self.norm(self.inputs_preproc[-1])
labels_norm = self.norm(self.label[-1])
n = self.noise
if n.valid:
LOG.info("adding noise")
awgn = self.gen_noise(inputs_norm, 'gaussian', n.max)
gp = self.gen_noise(inputs_norm, 'crf', 5 / 255, n.max)
else:
awgn = gp = tf.zeros_like(inputs_norm)
if self.level == 1:
noise = awgn
elif self.level == 2:
noise = gp
else:
raise NotImplementedError("Unknown level!")
with tf.variable_scope('Offset'):
shift = []
if not self.auto:
for i in range(4):
shift.append(Noise.tf_gaussian_noise(inputs_norm, n.offset[i]))
var_shift = []
else:
for i in range(4):
shift.append(self.noise_shift(inputs_norm, 8, f'NoiseShift_{i}'))
var_shift = tf.trainable_variables('Offset')
noise_hyp, outputs = self.net(inputs_norm + noise, 1, n.scale, shift)
self.outputs += [tf.abs(x * 255) for x in noise_hyp + shift]
self.outputs += [self.denorm(x) for x in outputs]
l1_image = tf.losses.absolute_difference(outputs[-1], labels_norm)
noise_abs_diff = tf.abs(noise_hyp[-1]) - tf.abs(noise)
# 1: over estimated; 0: under estimated
penalty = tf.ceil(tf.clip_by_value(noise_abs_diff, 0, 1))
# 1 - n: over estimated; n: under estimated
penalty = tf.abs(n.penalty - penalty)
noise_error = penalty * tf.squared_difference(noise_hyp[-1], noise)
l2_noise = tf.reduce_mean(noise_error)
# tv clamp
tv = tf.reduce_mean(tf.image.total_variation(noise_hyp[-1]))
l_tv_max = tf.nn.relu(tv - 1000) ** 2
l_tv_min = tf.nn.relu(200 - tv) ** 2
tv = tv + l_tv_max + l_tv_min
def loss_fn1():
w = self.weights
loss = l1_image * w[0] + l2_noise * w[1] + tv * w[2]
var_to_opt = tf.trainable_variables(self.name + f"/Level1")
update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS)
with tf.control_dependencies(update_ops):
op = tf.train.AdamOptimizer(self.learning_rate, 0.9)
op = op.minimize(loss, self.global_steps, var_list=var_to_opt)
self.loss.append(op)
self.train_metric['mae'] = l1_image
self.train_metric['noise_error'] = l2_noise
self.train_metric['tv'] = tv
self.to_sum += noise_hyp
def loss_fn2():
w = self.weights
tv_noise = [tf.reduce_mean(tf.image.total_variation(x)) for x in shift]
tv_noise = tf.add_n(tv_noise) / 4
tv_max = tf.nn.relu(tv_noise - 1000) ** 2
tv_min = tf.nn.relu(200 - tv_noise) ** 2
tv_noise += tv_max + tv_min
loss = l1_image * w[0] + tv_noise * w[2]
update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS)
with tf.control_dependencies(update_ops):
op = tf.train.AdamOptimizer(self.learning_rate, 0.9)
op = op.minimize(loss, self.global_steps, var_list=var_shift)
self.loss.append(op)
self.train_metric['mae'] = l1_image
self.train_metric['tv'] = tv_noise
with tf.name_scope('Loss'):
if not self.auto:
loss_fn1()
else:
loss_fn2()
self.metrics['psnr'] = tf.reduce_mean(
tf.image.psnr(self.label[-1], self.outputs[-1], max_val=255))
self.metrics['ssim'] = tf.reduce_mean(
tf.image.ssim(self.label[-1], self.outputs[-1], max_val=255))
def build_loss(self):
pass
def build_summary(self):
super(DRSR, self).build_summary()
# tf.summary.image('lr/input', self.inputs[-1])
tf.summary.image(f'hr/fine_1', clip_image(self.outputs[-1]))
tf.summary.image('hr/label', clip_image(self.label[0]))
def build_saver(self):
var_misc = tf.global_variables('Loss') + [self.global_steps]
self.savers.update(misc=tf.train.Saver(var_misc, max_to_keep=1))
var_g = tf.global_variables(self.name + f"/Level1")
self.savers.update({
f"level_1": tf.train.Saver(var_g, max_to_keep=1)
})
if self.auto:
self.savers.update(shift=tf.train.Saver(
tf.global_variables('Offset'),
max_to_keep=1))