def test_dtype_upcast(self):
# Checks dtype upcast for Corr3dMM methods.
if not theano.config.cxx:
pytest.skip("Need cxx for this test")
def rand(shape, dtype="float64"):
r = np.asarray(np.random.rand(*shape), dtype=dtype)
return r * 2 - 1
ops = [
corr3d.Corr3dMM, corr3d.Corr3dMM_gradWeights,
corr3d.Corr3dMM_gradInputs
]
a_shapes = [[4, 5, 6, 3, 3], [1, 5, 6, 3, 3], [1, 5, 6, 3, 3]]
b_shapes = [[7, 5, 3, 2, 2], [1, 5, 3, 1, 1], [7, 1, 3, 1, 1]]
dtypes = ["float32", "float64"]
for op, a_shape, b_shape in zip(ops, a_shapes, b_shapes):
for a_dtype in dtypes:
for b_dtype in dtypes:
c_dtype = theano.scalar.upcast(a_dtype, b_dtype)
a_tens = T.tensor5(dtype=a_dtype)
b_tens = T.tensor5(dtype=b_dtype)
a_tens_val = rand(a_shape, dtype=a_dtype)
b_tens_val = rand(b_shape, dtype=b_dtype)
c_tens = op()(a_tens, b_tens)
f = theano.function([a_tens, b_tens],
c_tens,
mode=self.mode)
assert f(a_tens_val, b_tens_val).dtype == c_dtype
def test_dtype_upcast(self):
"""
Checks dtype upcast for Corr3dMM methods.
"""
def rand(shape, dtype="float64"):
r = numpy.asarray(numpy.random.rand(*shape), dtype=dtype)
return r * 2 - 1
ops = [corr3d.Corr3dMM, corr3d.Corr3dMM_gradWeights, corr3d.Corr3dMM_gradInputs]
a_shapes = [[4, 5, 6, 3, 3], [1, 5, 6, 3, 3], [1, 5, 6, 3, 3]]
b_shapes = [[7, 5, 3, 2, 2], [1, 5, 3, 1, 1], [7, 1, 3, 1, 1]]
dtypes = ["float32", "float64"]
for op, a_shape, b_shape in zip(ops, a_shapes, b_shapes):
for a_dtype in dtypes:
for b_dtype in dtypes:
c_dtype = theano.scalar.upcast(a_dtype, b_dtype)
a_tens = T.tensor5(dtype=a_dtype)
b_tens = T.tensor5(dtype=b_dtype)
a_tens_val = rand(a_shape, dtype=a_dtype)
b_tens_val = rand(b_shape, dtype=b_dtype)
c_tens = op()(a_tens, b_tens)
f = theano.function([a_tens, b_tens], c_tens, mode=self.mode)
assert_equals(f(a_tens_val, b_tens_val).dtype, c_dtype)
def test_dtype_upcast(self):
"""
Checks dtype upcast for Corr3dMM methods.
"""
def rand(shape, dtype='float64'):
r = numpy.asarray(numpy.random.rand(*shape), dtype=dtype)
return r * 2 - 1
ops = [corr3d.Corr3dMM, corr3d.Corr3dMM_gradWeights, corr3d.Corr3dMM_gradInputs]
a_shapes = [[4, 5, 6, 3, 3], [1, 5, 6, 3, 3], [1, 5, 6, 3, 3]]
b_shapes = [[7, 5, 3, 2, 2], [1, 5, 3, 1, 1], [7, 1, 3, 1, 1]]
dtypes = ['float32', 'float64']
for op, a_shape, b_shape in zip(ops, a_shapes, b_shapes):
for a_dtype in dtypes:
for b_dtype in dtypes:
c_dtype = theano.scalar.upcast(a_dtype, b_dtype)
a_tens = T.tensor5(dtype=a_dtype)
b_tens = T.tensor5(dtype=b_dtype)
a_tens_val = rand(a_shape, dtype=a_dtype)
b_tens_val = rand(b_shape, dtype=b_dtype)
c_tens = op()(a_tens, b_tens)
f = theano.function([a_tens, b_tens], c_tens, mode=self.mode)
assert_equals(f(a_tens_val, b_tens_val).dtype, c_dtype)
def setup_method(self):
self.input = tt.tensor5("input", dtype=self.dtype)
self.input.name = "default_V"
self.filters = tt.tensor5("filters", dtype=self.dtype)
self.filters.name = "default_filters"
# This tests can run even when theano.config.blas.ldflags is empty.
super().setup_method()
def test_dtype_upcast(self):
# Checks dtype upcast for Corr3dMM methods.
if not theano.config.cxx:
raise SkipTest("Need cxx for this test")
def rand(shape, dtype='float64'):
r = np.asarray(np.random.rand(*shape), dtype=dtype)
return r * 2 - 1
ops = [corr3d.Corr3dMM, corr3d.Corr3dMM_gradWeights, corr3d.Corr3dMM_gradInputs]
a_shapes = [[4, 5, 6, 3, 3], [1, 5, 6, 3, 3], [1, 5, 6, 3, 3]]
b_shapes = [[7, 5, 3, 2, 2], [1, 5, 3, 1, 1], [7, 1, 3, 1, 1]]
dtypes = ['float32', 'float64']
for op, a_shape, b_shape in zip(ops, a_shapes, b_shapes):
for a_dtype in dtypes:
for b_dtype in dtypes:
c_dtype = theano.scalar.upcast(a_dtype, b_dtype)
a_tens = T.tensor5(dtype=a_dtype)
b_tens = T.tensor5(dtype=b_dtype)
a_tens_val = rand(a_shape, dtype=a_dtype)
b_tens_val = rand(b_shape, dtype=b_dtype)
c_tens = op()(a_tens, b_tens)
f = theano.function([a_tens, b_tens], c_tens, mode=self.mode)
assert_equals(f(a_tens_val, b_tens_val).dtype, c_dtype)
def setUp(self):
super(TestCorr3D, self).setUp()
self.input = T.tensor5("input", dtype=self.dtype)
self.input.name = "default_V"
self.filters = T.tensor5("filters", dtype=self.dtype)
self.filters.name = "default_filters"
if not conv.imported_scipy_signal and theano.config.cxx == "":
raise SkipTest("Corr3dMM tests need SciPy or a c++ compiler")
def setUp(self):
super(TestCorr3D, self).setUp()
self.input = T.tensor5('input', dtype=self.dtype)
self.input.name = 'default_V'
self.filters = T.tensor5('filters', dtype=self.dtype)
self.filters.name = 'default_filters'
if not conv.imported_scipy_signal and theano.config.cxx == "":
raise SkipTest("Corr3dMM tests need SciPy or a c++ compiler")
def setup_method(self):
self.input = T.tensor5("input", dtype=self.dtype)
self.input.name = "default_V"
self.filters = T.tensor5("filters", dtype=self.dtype)
self.filters.name = "default_filters"
if not conv.imported_scipy_signal and theano.config.cxx == "":
pytest.skip("Corr3dMM tests need SciPy or a c++ compiler")
# This tests can run even when theano.config.blas.ldflags is empty.
super().setup_method()
def setUp(self):
super(TestCorr3D, self).setUp()
self.input = T.tensor5('input', dtype=self.dtype)
self.input.name = 'default_V'
self.filters = T.tensor5('filters', dtype=self.dtype)
self.filters.name = 'default_filters'
if not conv.imported_scipy_signal and theano.config.cxx == "":
raise SkipTest("Corr3dMM tests need SciPy or a c++ compiler")
if not theano.config.blas.ldflags:
raise SkipTest("Corr3dMM tests need a BLAS")
def build_model_3d(self):
self.input = T.tensor5('input')
self.params = ()
c_input = self.input
feat_maps = 1
for ker, actfunc in self.conv_layers:
conv = Conv_2d_to_3d(input=c_input,
ker_size=ker[-3:],
bank_size=1,
input_maps=ker[1],
output_maps=ker[0],
activation=actfunc)
c_input = conv.output
self.params += conv.params
feat_maps = ker[0]
c_h_input = T.transpose(c_input, axes=(0, 2, 3, 4, 1))
c_n_in = feat_maps
self.classifier = LogisticMultiLabelClassifier(
T.reshape(c_h_input,
(T.prod(c_h_input.shape[:4]), c_h_input.shape[4])),
c_n_in, self.n_out)
self.params += self.classifier.params
def __setstate__(self, params):
"""Pickle load config."""
self.__dict__.update(params[0])
if params[2] is not None and params[3] is not None:
input_network = Network.load_model(params[2])
self.input_var = input_network.input_var
self.input_network = {
'network': input_network,
'layer': params[3],
'get_params': params[4]
}
else:
tensor_size = len(self.input_dimensions)
if tensor_size == 2:
self.input_var = T.matrix('input')
elif tensor_size == 3:
self.input_var = T.tensor3('input')
elif tensor_size == 4:
self.input_var = T.tensor4('input')
elif tensor_size == 5:
self.input_var = T.tensor5('input')
self.y = T.matrix('truth')
self.__init__(self.__dict__['name'], self.__dict__['input_dimensions'],
self.__dict__['input_var'], self.__dict__['y'],
self.__dict__['config'], self.__dict__['input_network'],
self.__dict__['num_classes'],
self.__dict__['activation'],
self.__dict__['pred_activation'],
self.__dict__['optimizer'],
self.__dict__['learning_rate'])
lasagne.layers.set_all_param_values(self.layers, params[1],
**{self.name: True})
def __init__(self,
generator,
obs,
num_samples,
hdim,
L,
epsilon,
box=(60, 100, 60, 100),
init_state=None):
self.generator = generator
self.batch_size = obs.shape[0]
print obs.shape, init_state.shape
self.img_size = obs.shape[-1]
self.obs_val = sharedX(
np.reshape(obs,
[1, self.batch_size, 3, self.img_size, self.img_size]))
self.obs = T.tensor5()
self.t = T.scalar()
self.n_sam = num_samples
self.hdim = hdim
self.L = L
self.eps = epsilon
# mask
mask = numpy.ones((1, 3, self.img_size, self.img_size))
mask[:, :, box[0]:box[1], box[2]:box[3]] = 0
self.mask = sharedX(mask)
self.build(self.eps, self.L, init_state=init_state)
print self.img_size, self.n_sam
def __init__(self,
generator,
obs,
num_samples,
sigma,
hdim,
L,
epsilon,
prior,
init_state=None):
self.generator = generator
self.batch_size = obs.shape[0]
self.obs_val = sharedX(np.reshape(obs,
[1, self.batch_size, 3, 32, 32]))
#ftensor5 = TensorType('float32', (False,)*5)
#self.obs = ftensor5()
self.obs = T.tensor5()
#pdb.set_trace()
self.t = T.scalar()
self.sigma = sigma
self.n_sam = num_samples
self.hdim = hdim
self.L = L
self.eps = epsilon
self.prior = prior
if init_state is None:
self.build(self.eps, self.L)
else:
self.build(self.eps, self.L, init_state=init_state)
def run(fold=0):
print fold
I_AM_FOLD = fold
all_data = load_dataset(folder=paths.preprocessed_validation_data_folder)
use_patients = all_data
experiment_name = "final"
results_folder = os.path.join(paths.results_folder, experiment_name,
"fold%d" % I_AM_FOLD)
write_images = False
save_npy = True
INPUT_PATCH_SIZE = (None, None, None)
BATCH_SIZE = 2
n_repeats = 2
num_classes = 4
x_sym = T.tensor5()
net, seg_layer = build_net(x_sym,
INPUT_PATCH_SIZE,
num_classes,
4,
16,
batch_size=BATCH_SIZE,
do_instance_norm=True)
output_layer = seg_layer
results_out_folder = os.path.join(results_folder, "pred_val_set")
if not os.path.isdir(results_out_folder):
os.mkdir(results_out_folder)
with open(
os.path.join(results_folder, "%s_Params.pkl" % (experiment_name)),
'r') as f:
params = cPickle.load(f)
lasagne.layers.set_all_param_values(output_layer, params)
print "compiling theano functions"
output = softmax_helper(
lasagne.layers.get_output(output_layer,
x_sym,
deterministic=False,
batch_norm_update_averages=False,
batch_norm_use_averages=False))
pred_fn = theano.function([x_sym], output)
_ = pred_fn(
np.random.random((BATCH_SIZE, 4, 176, 192, 176)).astype(np.float32))
run_validation_mirroring(pred_fn,
results_out_folder,
use_patients,
write_images=write_images,
hasBrainMask=False,
BATCH_SIZE=BATCH_SIZE,
num_repeats=n_repeats,
preprocess_fn=preprocess,
save_npy=save_npy,
save_proba=False)
def build_network(kwargs):
'''Takes a pretrained classification net and adds a few convolutional layers on top of it
and defines a detection loss function'''
'''Args:
num_convpool: number of conv layer-pool layer pairs
delta: smoothing constant to loss function (ie sqrt(x + delta))
-> if x is 0 gradient is undefined
num_filters
num_fc_units
num_extra_conv: conv layers to add on to each conv layer before max pooling
nonlinearity: which nonlinearity to use throughout
n_boxes: how many boxes should be predicted at each grid point,
nclass: how many classes are we predicting,
grid_size: size of the grid that encodes various
locations of image (ie in the YOLO paper they use 7x7 grid)
w_init: weight intitialization
dropout_p: prob of dropping unit
coord_penalty : penalty in YOLO loss function for getting coordinates wrong
nonobj_penalty: penalty in YOLO loss for guessing object when there isn't one
learning_rate
weight_decay
momentum
load: whether to load weights or not
load_path: path for loading weights'''
if kwargs["im_dim"] == 3:
input_var = T.tensor5('input_var')
else:
input_var = T.tensor4('input_var')
target_var = T.tensor4('target_var') #is of shape (grid_size, grid_size,(n_boxes* 5 + nclass)
print "Building model and compiling functions..."
#make layers
networks = build_layers(input_var,kwargs)
#load in any pretrained weights
if kwargs['ae_load_path'] != "None":
networks['ae'] = load_weights(kwargs['ae_load_path'], networks['ae'])
if kwargs['yolo_load_path'] != "None":
networks['yolo'] = load_weights(kwargs['yolo_load_path'], networks['yolo'])
#compile theano functions
fns = make_fns(networks, input_var, target_var, kwargs)
return fns, networks
def _to_symbolic_var(x):
if x.ndim == 0:
return T.scalar()
elif x.ndim == 1:
return T.vector()
elif x.ndim == 2:
return T.matrix()
elif x.ndim == 3:
return T.tensor3()
elif x.ndim == 4:
return T.tensor4()
elif x.ndim == 5:
return T.tensor5()
else:
raise Exception()
def main():
hf = h5py.File("/hdd/Documents/Data/3D-MNIST/full_dataset_vectors.h5", "r")
X_train = hf["X_train"][0].reshape(1, 1, 16, 16, 16)
X_train = np.rollaxis(X_train, 2, 5)
X_train = np.array(X_train, dtype = np.float32)
input_var = T.tensor5('inputs')
network = build_cnn(input_var, 1)
network_output = lasagne.layers.get_output(network)
get_rotated = theano.function([input_var], network_output)
image_result = get_rotated(X_train)
import amitgroup as ag
import amitgroup.plot as gr
gr.images(np.mean(image_result, axis = 4)[0,0])
return
def _to_symbolic_var(x):
if x.ndim == 0:
return T.scalar()
elif x.ndim == 1:
return T.vector()
elif x.ndim == 2:
return T.matrix()
elif x.ndim == 3:
return T.tensor3()
elif x.ndim == 4:
return T.tensor4()
elif x.ndim == 5:
return T.tensor5()
else:
raise Exception()
def __init__(self, input_shape=(None, 1, 33, 33, 33)):
self.cubeSize = input_shape[-1]
# Theano variables
self.input_var = T.tensor5('input_var') # input image
self.target_var = T.ivector('target_var') # target
self.logger = logging.getLogger(__name__)
input_layer = InputLayer(input_shape, self.input_var)
self.logger.info('The shape of input layer is {}'.format(
get_output_shape(input_layer)))
hidden_layer1 = Conv3DLayer(incoming=input_layer,
num_filters=16,
filter_size=(3, 3, 3),
W=HeUniform(gain='relu'),
nonlinearity=rectify)
self.logger.info('The shape of first hidden layer is {}'.format(
get_output_shape(hidden_layer1)))
hidden_layer2 = Conv3DLayer(incoming=hidden_layer1,
num_filters=32,
filter_size=(3, 3, 3),
W=HeUniform(gain='relu'),
nonlinearity=rectify)
self.logger.info('The shape of second hidden layer is {}'.format(
get_output_shape(hidden_layer2)))
hidden_layer3 = Conv3DLayer(incoming=hidden_layer2,
num_filters=2,
filter_size=(1, 1, 1),
W=HeUniform(gain='relu'),
nonlinearity=rectify)
self.logger.info('The shape of third hidden layer is {}'.format(
get_output_shape(hidden_layer3)))
shuffledLayer = DimshuffleLayer(hidden_layer3, (0, 2, 3, 4, 1))
self.logger.info('The shape of shuffled layer is {}'.format(
get_output_shape(shuffledLayer)))
reshapedLayer = ReshapeLayer(shuffledLayer, ([0], -1))
self.logger.info('The shape of reshaped layer is {}'.format(
get_output_shape(reshapedLayer)))
self.output_layer = NonlinearityLayer(reshapedLayer, softmax)
self.logger.info('The shape of output layer is {}'.format(
get_output_shape(self.output_layer)))
def get_net(net_cfg, args):
l_out, ladder = net_cfg(args)
if args["mode"] == "2d":
X = T.tensor4('X')
elif args["mode"] == "3d":
X = T.tensor5('X')
ladder_output = get_output([l_out] + ladder, X)
net_out = ladder_output[0]
# squared error loss is between the first two terms
loss = squared_error(net_out, X).mean()
ladder_output = ladder_output[1::]
if "ladder" in args:
sys.stderr.write("using ladder connections for conv\n")
for i in range(0, len(ladder_output), 2):
sys.stderr.write("ladder connection between %s and %s\n" % (str(ladder[i].output_shape), str(ladder[i+1].output_shape)) )
assert ladder[i].output_shape == ladder[i+1].output_shape
loss += args["ladder"]*squared_error(ladder_output[i], ladder_output[i+1]).mean()
net_out_det = get_output(l_out, X, deterministic=True)
# this is deterministic + doesn't have the reg params added to the end
loss_det = squared_error(net_out_det, X).mean()
params = get_all_params(l_out, trainable=True)
lr = theano.shared(floatX(args["learning_rate"]))
if "optim" not in args:
updates = nesterov_momentum(loss, params, learning_rate=lr, momentum=0.9)
else:
if args["optim"] == "rmsprop":
updates = rmsprop(loss, params, learning_rate=lr)
elif args["optim"] == "adam":
updates = adam(loss, params, learning_rate=lr)
train_fn = theano.function([X], [loss, loss_det], updates=updates)
loss_fn = theano.function([X], loss)
out_fn = theano.function([X], net_out_det)
return {
"train_fn": train_fn,
"loss_fn": loss_fn,
"out_fn": out_fn,
"lr": lr,
"l_out": l_out
}
def fSPP(inp, level=3):
inshape = inp._keras_shape[2:]
Kernel = [[0] * 3 for i in range(level)]
Stride = [[0] * 3 for i in range(level)]
SPPout = T.tensor5()
for iLevel in range(level):
Kernel[iLevel] = np.ceil(np.divide(inshape, iLevel + 1,
dtype=float)).astype(int)
Stride[iLevel] = np.floor(np.divide(inshape, iLevel + 1,
dtype=float)).astype(int)
if inshape[2] % 3 == 2:
Kernel[2][2] = Kernel[2][2] + 1
poolLevel = MaxPooling3D(pool_size=Kernel[iLevel],
strides=Stride[iLevel])(inp)
if iLevel == 0:
SPPout = Flatten()(poolLevel)
else:
poolFlat = Flatten()(poolLevel)
SPPout = concatenate([SPPout, poolFlat], axis=1)
return SPPout
def compile_fn(network, net_config, args):
"""
Create Training function and validation function
"""
# Hyper-parameters
base_lr = float(args.lr[0])
l2 = float(args.l2[0])
# Theano variables
input_var = net_config['input'].input_var
mask_var = net_config['mask'].input_var
kspace_var = net_config['kspace_input'].input_var
target_var = T.tensor5('targets')
# Objective
pred = lasagne.layers.get_output(network)
# complex valued signal has 2 channels, which counts as 1.
loss_sq = lasagne.objectives.squared_error(target_var, pred).mean() * 2
if l2:
l2_penalty = lasagne.regularization.regularize_network_params(network, lasagne.regularization.l2)
loss = loss_sq + l2_penalty * l2
update_rule = lasagne.updates.adam
params = lasagne.layers.get_all_params(network, trainable=True)
updates = update_rule(loss, params, learning_rate=base_lr)
print(' Compiling ... ')
t_start = time.time()
train_fn = theano.function([input_var, mask_var, kspace_var, target_var],
[loss], updates=updates,
on_unused_input='ignore')
val_fn = theano.function([input_var, mask_var, kspace_var, target_var],
[loss, pred],
on_unused_input='ignore')
t_end = time.time()
print(' ... Done, took %.4f s' % (t_end - t_start))
return train_fn, val_fn
def __init__(self, modelConfigFile):
self.logger = logging.getLogger(__name__)
self.modelConfig = {}
execfile(modelConfigFile, self.modelConfig)
self.numOfFMs = self.modelConfig['numOfFMs']
self.layerCategory = self.modelConfig['layerCategory']
self.numOfOutputClass = self.modelConfig['numOfOutputClass']
self.numOfInputChannels = self.modelConfig['numOfInputChannels']
self.receptiveField = reduce(
lambda x, y: x + y,
[int(layer[-1]) - 1 for layer in self.layerCategory], 1)
self.inputShape = (None, self.numOfInputChannels, self.receptiveField,
self.receptiveField, self.receptiveField)
self.inputVar = T.tensor5('inputVar', dtype=theano.config.floatX)
self.targetVar = T.ivector('targetVar')
self.sectorNet = self.buildSectorNet()
import random
import math
import numpy as np
import random
from library import read_text_as_list, read_list_into_array, read_lists_into_arrays
from network_definitions import fc
from training_macros import train_network
# Define parameters, prepare variables
l1_penalty = 0
l2_penalty = 1e-4
list = read_text_as_list(args.image_text_list)
num_modalities = np.size(list[0].split(','))
# Prepare Theano variables for inputs and targets
patch_var = T.tensor5('patch')
loc_var = T.tensor5('loc')
target_var = T.fmatrix('targets')
learning_rate = T.scalar(name='learning_rate')
iter = T.scalar(name='iter')
num_labels = args.num_labels
# Get network
[network,
shaped] = fc(args.input_patch_radius, args.output_patch_radius, patch_var,
loc_var, target_var, args.location, num_modalities, num_labels)
# Create a loss expression for training
prediction = lasagne.layers.get_output(network, deterministic=False)
loss = lasagne.objectives.categorical_crossentropy(prediction, target_var)
def run(fold=0):
print fold
# =================================================================================================================
I_AM_FOLD = fold
np.random.seed(65432)
lasagne.random.set_rng(np.random.RandomState(98765))
sys.setrecursionlimit(2000)
BATCH_SIZE = 2
INPUT_PATCH_SIZE =(128, 128, 128)
num_classes=4
EXPERIMENT_NAME = "final"
results_dir = os.path.join(paths.results_folder)
if not os.path.isdir(results_dir):
os.mkdir(results_dir)
results_dir = os.path.join(results_dir, EXPERIMENT_NAME)
if not os.path.isdir(results_dir):
os.mkdir(results_dir)
results_dir = os.path.join(results_dir, "fold%d"%I_AM_FOLD)
if not os.path.isdir(results_dir):
os.mkdir(results_dir)
n_epochs = 300
lr_decay = np.float32(0.985)
base_lr = np.float32(0.0005)
n_batches_per_epoch = 100
n_test_batches = 10
n_feedbacks_per_epoch = 10.
num_workers = 6
workers_seeds = [123, 1234, 12345, 123456, 1234567, 12345678]
# =================================================================================================================
all_data = load_dataset()
keys_sorted = np.sort(all_data.keys())
crossval_folds = KFold(len(all_data.keys()), n_folds=5, shuffle=True, random_state=123456)
ctr = 0
for train_idx, test_idx in crossval_folds:
print len(train_idx), len(test_idx)
if ctr == I_AM_FOLD:
train_keys = [keys_sorted[i] for i in train_idx]
test_keys = [keys_sorted[i] for i in test_idx]
break
ctr += 1
train_data = {i:all_data[i] for i in train_keys}
test_data = {i:all_data[i] for i in test_keys}
data_gen_train = create_data_gen_train(train_data, INPUT_PATCH_SIZE, num_classes, BATCH_SIZE,
contrast_range=(0.75, 1.5), gamma_range = (0.8, 1.5),
num_workers=num_workers, num_cached_per_worker=2,
do_elastic_transform=True, alpha=(0., 1300.), sigma=(10., 13.),
do_rotation=True, a_x=(0., 2*np.pi), a_y=(0., 2*np.pi), a_z=(0., 2*np.pi),
do_scale=True, scale_range=(0.75, 1.25), seeds=workers_seeds)
data_gen_validation = BatchGenerator3D_random_sampling(test_data, BATCH_SIZE, num_batches=None, seed=False,
patch_size=INPUT_PATCH_SIZE, convert_labels=True)
val_transforms = []
val_transforms.append(GenerateBrainMaskTransform())
val_transforms.append(BrainMaskAwareStretchZeroOneTransform(clip_range=(-5, 5), per_channel=True))
val_transforms.append(SegChannelSelectionTransform([0]))
val_transforms.append(ConvertSegToOnehotTransform(range(4), 0, "seg_onehot"))
val_transforms.append(DataChannelSelectionTransform([0, 1, 2, 3]))
data_gen_validation = MultiThreadedAugmenter(data_gen_validation, Compose(val_transforms), 2, 2)
x_sym = T.tensor5()
seg_sym = T.matrix()
net, seg_layer = build_net(x_sym, INPUT_PATCH_SIZE, num_classes, 4, 16, batch_size=BATCH_SIZE,
do_instance_norm=True)
output_layer_for_loss = net
# add some weight decay
l2_loss = lasagne.regularization.regularize_network_params(output_layer_for_loss, lasagne.regularization.l2) * 1e-5
# the distinction between prediction_train and test is important only if we enable dropout (batch norm/inst norm
# does not use or save moving averages)
prediction_train = lasagne.layers.get_output(output_layer_for_loss, x_sym, deterministic=False,
batch_norm_update_averages=False, batch_norm_use_averages=False)
loss_vec = - soft_dice_per_img_in_batch(prediction_train, seg_sym, BATCH_SIZE)[:, 1:]
loss = loss_vec.mean()
loss += l2_loss
acc_train = T.mean(T.eq(T.argmax(prediction_train, axis=1), seg_sym.argmax(-1)), dtype=theano.config.floatX)
prediction_test = lasagne.layers.get_output(output_layer_for_loss, x_sym, deterministic=True,
batch_norm_update_averages=False, batch_norm_use_averages=False)
loss_val = - soft_dice_per_img_in_batch(prediction_test, seg_sym, BATCH_SIZE)[:, 1:]
loss_val = loss_val.mean()
loss_val += l2_loss
acc = T.mean(T.eq(T.argmax(prediction_test, axis=1), seg_sym.argmax(-1)), dtype=theano.config.floatX)
# learning rate has to be a shared variable because we decrease it with every epoch
params = lasagne.layers.get_all_params(output_layer_for_loss, trainable=True)
learning_rate = theano.shared(base_lr)
updates = lasagne.updates.adam(T.grad(loss, params), params, learning_rate=learning_rate, beta1=0.9, beta2=0.999)
dc = hard_dice_per_img_in_batch(prediction_test, seg_sym.argmax(1), num_classes, BATCH_SIZE).mean(0)
train_fn = theano.function([x_sym, seg_sym], [loss, acc_train, loss_vec], updates=updates)
val_fn = theano.function([x_sym, seg_sym], [loss_val, acc, dc])
all_val_dice_scores=None
all_training_losses = []
all_validation_losses = []
all_validation_accuracies = []
all_training_accuracies = []
val_dice_scores = []
epoch = 0
while epoch < n_epochs:
if epoch == 100:
data_gen_train = create_data_gen_train(train_data, INPUT_PATCH_SIZE, num_classes, BATCH_SIZE,
contrast_range=(0.85, 1.25), gamma_range = (0.8, 1.5),
num_workers=6, num_cached_per_worker=2,
do_elastic_transform=True, alpha=(0., 1000.), sigma=(10., 13.),
do_rotation=True, a_x=(0., 2*np.pi), a_y=(-np.pi/8., np.pi/8.),
a_z=(-np.pi/8., np.pi/8.), do_scale=True, scale_range=(0.85, 1.15),
seeds=workers_seeds)
if epoch == 175:
data_gen_train = create_data_gen_train(train_data, INPUT_PATCH_SIZE, num_classes, BATCH_SIZE,
contrast_range=(0.9, 1.1), gamma_range = (0.85, 1.3),
num_workers=6, num_cached_per_worker=2,
do_elastic_transform=True, alpha=(0., 750.), sigma=(10., 13.),
do_rotation=True, a_x=(0., 2*np.pi), a_y=(-0.00001, 0.00001),
a_z=(-0.00001, 0.00001), do_scale=True, scale_range=(0.85, 1.15),
seeds=workers_seeds)
epoch_start_time = time.time()
learning_rate.set_value(np.float32(base_lr* lr_decay**(epoch)))
print "epoch: ", epoch, " learning rate: ", learning_rate.get_value()
train_loss = 0
train_acc_tmp = 0
train_loss_tmp = 0
batch_ctr = 0
for data_dict in data_gen_train:
data = data_dict["data"].astype(np.float32)
seg = data_dict["seg_onehot"].astype(np.float32).transpose(0, 2, 3, 4, 1).reshape((-1, num_classes))
if batch_ctr != 0 and batch_ctr % int(np.floor(n_batches_per_epoch/n_feedbacks_per_epoch)) == 0:
print "number of batches: ", batch_ctr, "/", n_batches_per_epoch
print "training_loss since last update: ", \
train_loss_tmp/np.floor(n_batches_per_epoch/n_feedbacks_per_epoch), " train accuracy: ", \
train_acc_tmp/np.floor(n_batches_per_epoch/n_feedbacks_per_epoch)
all_training_losses.append(train_loss_tmp/np.floor(n_batches_per_epoch/n_feedbacks_per_epoch))
all_training_accuracies.append(train_acc_tmp/np.floor(n_batches_per_epoch/n_feedbacks_per_epoch))
train_loss_tmp = 0
train_acc_tmp = 0
if len(val_dice_scores) > 0:
all_val_dice_scores = np.concatenate(val_dice_scores, axis=0).reshape((-1, num_classes))
try:
printLosses(all_training_losses, all_training_accuracies, all_validation_losses,
all_validation_accuracies, os.path.join(results_dir, "%s.png" % EXPERIMENT_NAME),
n_feedbacks_per_epoch, val_dice_scores=all_val_dice_scores,
val_dice_scores_labels=["brain", "1", "2", "3", "4", "5"])
except:
pass
loss_vec, acc, l = train_fn(data, seg)
loss = loss_vec.mean()
train_loss += loss
train_loss_tmp += loss
train_acc_tmp += acc
batch_ctr += 1
if batch_ctr >= n_batches_per_epoch:
break
all_training_losses.append(train_loss_tmp/np.floor(n_batches_per_epoch/n_feedbacks_per_epoch))
all_training_accuracies.append(train_acc_tmp/np.floor(n_batches_per_epoch/n_feedbacks_per_epoch))
train_loss /= n_batches_per_epoch
print "training loss average on epoch: ", train_loss
val_loss = 0
accuracies = []
valid_batch_ctr = 0
all_dice = []
for data_dict in data_gen_validation:
data = data_dict["data"].astype(np.float32)
seg = data_dict["seg_onehot"].astype(np.float32).transpose(0, 2, 3, 4, 1).reshape((-1, num_classes))
w = np.zeros(num_classes, dtype=np.float32)
w[np.unique(seg.argmax(-1))] = 1
loss, acc, dice = val_fn(data, seg)
dice[w==0] = 2
all_dice.append(dice)
val_loss += loss
accuracies.append(acc)
valid_batch_ctr += 1
if valid_batch_ctr >= n_test_batches:
break
all_dice = np.vstack(all_dice)
dice_means = np.zeros(num_classes)
for i in range(num_classes):
dice_means[i] = all_dice[all_dice[:, i]!=2, i].mean()
val_loss /= n_test_batches
print "val loss: ", val_loss
print "val acc: ", np.mean(accuracies), "\n"
print "val dice: ", dice_means
print "This epoch took %f sec" % (time.time()-epoch_start_time)
val_dice_scores.append(dice_means)
all_validation_losses.append(val_loss)
all_validation_accuracies.append(np.mean(accuracies))
all_val_dice_scores = np.concatenate(val_dice_scores, axis=0).reshape((-1, num_classes))
try:
printLosses(all_training_losses, all_training_accuracies, all_validation_losses, all_validation_accuracies,
os.path.join(results_dir, "%s.png" % EXPERIMENT_NAME), n_feedbacks_per_epoch,
val_dice_scores=all_val_dice_scores, val_dice_scores_labels=["brain", "1", "2", "3", "4", "5"])
except:
pass
with open(os.path.join(results_dir, "%s_Params.pkl" % (EXPERIMENT_NAME)), 'w') as f:
cPickle.dump(lasagne.layers.get_all_param_values(output_layer_for_loss), f)
with open(os.path.join(results_dir, "%s_allLossesNAccur.pkl"% (EXPERIMENT_NAME)), 'w') as f:
cPickle.dump([all_training_losses, all_training_accuracies, all_validation_losses,
all_validation_accuracies, val_dice_scores], f)
epoch += 1
net_input[0,3] = patient_data["adc"]
net_input[0,4] = patient_data["cbv"]
print "compiling theano functions"
# uild_UNet(n_input_channels=1, BATCH_SIZE=None, num_output_classes=2, pad='same', nonlinearity=lasagne.nonlinearities.elu, input_dim=(128, 128), base_n_filters=64, do_dropout=False):
net = build_UNet3D(5, 1, num_output_classes=5, base_n_filters=16, input_dim=new_shape, pad=0)
output_layer = net["segmentation"]
with open(os.path.join(results_folder, "%s_allLossesNAccur_ep%d.pkl" % (experiment_name, epoch)), 'r') as f:
tmp = cPickle.load(f)
with open(os.path.join(results_folder, "%s_Params_ep%d.pkl" % (experiment_name, epoch)), 'r') as f:
params = cPickle.load(f)
lasagne.layers.set_all_param_values(output_layer, params)
import theano.tensor as T
data_sym = T.tensor5()
output = softmax_helper(lasagne.layers.get_output(output_layer, data_sym, deterministic=False))
pred_fn = theano.function([data_sym], output)
print "predicting image"
cmap = ListedColormap([(0,0,0), (0,0,1), (0,1,0), (1,0,0), (1,1,0), (0.3, 0.5, 1)])
res = pred_fn(net_input)
res_img = res.argmax(1)[0]
seg = patient_data["seg"]
seg = center_crop_3d_image(seg, output_layer.output_shape[2:])
patient_data["t1"] = center_crop_3d_image(patient_data["t1"], output_layer.output_shape[2:])
patient_data["t1km"] = center_crop_3d_image(patient_data["t1km"], output_layer.output_shape[2:])
patient_data["flair"] = center_crop_3d_image(patient_data["flair"], output_layer.output_shape[2:])
def main(model='mlp', num_epochs=100):
# Load the dataset
print("Loading data...")
# num_per_class = 100
# print("Using %d per class" % num_per_class)
print("Using all the training data")
# Load Data##
X_train, y_train, X_test, y_test = load_data_3D("/X_train.npy",
"/Y_train.npy",
"/X_test.npy",
"/Y_test.npy",
"MNIST_3D")
X_test_all = X_test
y_test_all = y_test
X_test = X_test_all[:200]
y_test = y_test[:200]
X_train_final = []
y_train_final = []
for i in range(10):
X_train_class = X_train[y_train == i]
permutate_index = np.arange(X_train_class.shape[0])
X_train_final.append(X_train_class[permutate_index[:100]])
y_train_final += [i] * 100
X_train = np.vstack(X_train_final)
y_train = np.array(y_train_final, dtype=np.int32)
# Define Batch Size ##
batch_size = 100
# Define nRotation for exhaustive search ##
nRotation = 8
# The dimension would be (nRotation * n, w, h)
input_var = T.tensor5('inputs')
vanilla_target_var = T.ivector('vanilla_targets')
# Create neural network model (depending on first command line parameter)
network, network_for_rotation, weight_decay, network_transformed = \
build_cnn(input_var, batch_size)
# saved_weights = np.load("../data/mnist_Chi_dec_100.npy")
saved_weights = \
np.load("../data/mnist_CNN_params_drop_out_Chi_2017_hinge.npy")
affine_matrix_matrix = [np.zeros((batch_size * 10,), dtype=np.float32),
np.zeros((batch_size * 10,), dtype=np.float32),
np.zeros((batch_size * 10,), dtype=np.float32)]
network_saved_weights = affine_matrix_matrix + \
[saved_weights[i] for i in range(saved_weights.shape[0])]
lasagne.layers.set_all_param_values(network, network_saved_weights)
# Create a loss expression for training, i.e., a scalar objective we want
# to minimize (for our multi-class problem, it is the cross-entropy loss):
# The dimension would be (nRotation * n, 10)
predictions = lasagne.layers.get_output(network)
predictions = T.reshape(predictions, (-1, 10, 10))
predictions_rotation = lasagne.layers.get_output(network_for_rotation,
deterministic=True)
predictions_rotation_for_loss = \
lasagne.layers.get_output(network_for_rotation)
transformed_images = lasagne.layers.get_output(network_transformed,
deterministic=True)
# loss_affine_before = \
# lasagne.objectives.squared_error(predictions_rotation.clip(-20, 3), 3) + lasagne.objectives.squared_error(predictions_rotation.clip(3, 20), 20)
loss_affine_before = lasagne.objectives.squared_error(predictions_rotation.clip(-20, 20), 20)
# loss_affine_before = -predictions_rotation_for_loss
loss_affine = loss_affine_before.mean()
loss = lasagne.objectives.multiclass_hinge_loss(
predictions_rotation_for_loss, vanilla_target_var)
loss = loss.mean() + weight_decay
# This is to use the rotation that the "gradient descent" think will
# give the highest score for each of the classes
train_acc_1 = T.mean(T.eq(T.argmax(predictions_rotation_for_loss, axis=1),
vanilla_target_var), dtype=theano.config.floatX)
# This is to use all the scores produces by all the rotations,
# compare them and get the highest one for each digit
train_acc_2 = T.mean(T.eq(T.argmax(T.max(predictions, axis=1), axis=1),
vanilla_target_var), dtype=theano.config.floatX)
params = lasagne.layers.get_all_params(network, trainable=True)
affine_params = params[:3]
model_params = params[3:]
updates_affine = lasagne.updates.sgd(loss_affine, affine_params,
learning_rate=1000)
"""
d_loss_wrt_params = T.grad(loss_affine, affine_params)
updates_affine = OrderedDict()
for param, grad in zip(affine_params, d_loss_wrt_params):
updates_affine[param] = param - 1000 * grad
"""
updates_model = lasagne.updates.adagrad(loss, model_params,
learning_rate=0.01)
test_prediction = lasagne.layers.get_output(network, deterministic=True)
test_prediction = T.reshape(test_prediction, (-1, 10, 10))
test_prediction_rotation = lasagne.layers.get_output(network_for_rotation,
deterministic=True)
test_acc = T.mean(T.eq(T.argmax(T.max(test_prediction, axis=1), axis=1),
vanilla_target_var),
dtype=theano.config.floatX)
# Compile a function performing a training step on a mini-batch (by giving
# the updates dictionary) and returning the corresponding training loss:
train_model_fn = theano.function([input_var, vanilla_target_var],
[loss, train_acc_1, train_acc_2],
updates=updates_model)
train_affine_fn = theano.function([input_var],
[loss_affine, loss_affine_before],
updates=updates_affine)
val_fn = theano.function([input_var, vanilla_target_var], [test_acc, transformed_images])
Parallel_Search = True
TRAIN = True
TEST = True
# Finally, launch the training loop.
# We iterate over epochs:
cached_affine_matrix = np.array(np.zeros((3, X_train.shape[0], 10)),
dtype=np.float32)
for epoch in range(num_epochs):
start_time = time.time()
if (epoch % 20 == 0 or epoch + 1 == num_epochs) and TEST:
print ("Start Evaluating...")
test_acc = 0
test_batches = 0
affine_test_batches = 0
# Find best rotation
if epoch + 1 == num_epochs:
X_test = X_test_all
y_test = y_test_all
cached_affine_matrix_test = \
np.array(np.zeros((3, X_test.shape[0], 10)), dtype=np.float32)
for batch in iterate_minibatches(X_test, y_test,
batch_size, shuffle=False):
inputs, targets, index = batch
inputs = inputs.reshape(batch_size, 1, 40, 40, 40)
train_loss_before_all = []
affine_params_all = []
if Parallel_Search:
searchCandidate = 27
eachSearchCandidate = 3
eachDegree = 90.0 / eachSearchCandidate
for x in range(eachSearchCandidate):
x_degree = \
np.ones((batch_size * 10,), dtype=np.float32) * eachDegree * x - 45.0
for y in range(eachSearchCandidate):
y_degree = \
np.ones((batch_size * 10,), dtype=np.float32) * eachDegree * y - 45.0
for z in range(eachSearchCandidate):
z_degree = \
np.ones((batch_size * 10,), dtype=np.float32) * eachDegree * z - 45.0
affine_params[0].set_value(x_degree)
affine_params[1].set_value(y_degree)
affine_params[2].set_value(z_degree)
for i in range(10):
weightsOfParams = \
lasagne.layers.\
get_all_param_values(network)
train_loss, train_loss_before = \
train_affine_fn(inputs)
# print("degree x:", weightsOfParams[0][0])
# print("degree y:", weightsOfParams[1][0])
# print("degree z:", weightsOfParams[2][0])
# print("train_loss: ", train_loss_before[0])
# print("total_loss: ", train_loss)
affine_params_all.append(
np.array(weightsOfParams[:3]).reshape(
1, 3, batch_size, 10))
train_loss_before_all.append(
train_loss_before.reshape(
1, batch_size, 10))
else:
searchCandidate = 200
affine_params[0].set_value(np.zeros((batch_size * 10,),
dtype=np.float32))
affine_params[1].set_value(np.zeros((batch_size * 10,),
dtype=np.float32))
affine_params[2].set_value(np.zeros((batch_size * 10,),
dtype=np.float32))
for i in range(searchCandidate):
weightsOfParams = lasagne.layers.get_all_param_values(network)
train_loss, train_loss_before = train_affine_fn(inputs)
affine_params_all.append(np.array(weightsOfParams[:3].reshape(1, 3, batch_size, 10)))
train_loss_before_all.append(train_loss_before.reshape(1, batch_size, 10))
train_loss_before_all = np.vstack(train_loss_before_all)
affine_params_all = np.vstack(affine_params_all)
train_loss_before_all_reshape = train_loss_before_all.reshape(searchCandidate, -1)
affine_params_all_reshape_x = affine_params_all[:, 0].reshape(searchCandidate, -1)
affine_params_all_reshape_y = affine_params_all[:, 1].reshape(searchCandidate, -1)
affine_params_all_reshape_z = affine_params_all[:, 2].reshape(searchCandidate, -1)
# Find the search candidate that gives the lowest loss
train_arg_min = np.argmin(train_loss_before_all_reshape, axis=0)
# According to the best search candidate, get the rotations.
affine_params_all_reshape_x = affine_params_all_reshape_x[train_arg_min, np.arange(train_arg_min.shape[0])]
affine_params_all_reshape_y = affine_params_all_reshape_y[train_arg_min, np.arange(train_arg_min.shape[0])]
affine_params_all_reshape_z = affine_params_all_reshape_z[train_arg_min, np.arange(train_arg_min.shape[0])]
cached_affine_matrix_test[0, index] = affine_params_all_reshape_x.reshape(-1, 10)
cached_affine_matrix_test[1, index] = affine_params_all_reshape_y.reshape(-1, 10)
cached_affine_matrix_test[2, index] = affine_params_all_reshape_z.reshape(-1, 10)
affine_test_batches += 1
print(affine_test_batches)
for batch in iterate_minibatches(X_test, y_test, batch_size, shuffle=False):
inputs, targets, index = batch
affine_params[0].set_value(cached_affine_matrix_test[0, index].reshape(-1,))
affine_params[1].set_value(cached_affine_matrix_test[1, index].reshape(-1,))
affine_params[2].set_value(cached_affine_matrix_test[2, index].reshape(-1,))
inputs = inputs.reshape(batch_size, 1, 40, 40, 40)
acc, transformed_image_result = val_fn(inputs, targets)
test_acc += acc
test_batches += 1
if test_batches == 1:
np.save("/hdd/Documents/tmp/3d_transformed_image_%d.npy" % epoch, transformed_image_result)
print("Final results:")
print(" test accuracy:\t\t{:.2f} %".format(
test_acc / test_batches * 100))
if not TRAIN:
break
print("Starting training...")
train_err = 0
train_acc_sum_1 = 0
train_acc_sum_2 = 0
train_batches = 0
affine_train_batches = 0
if epoch % 20 == 0:
weightsOfParams = lasagne.layers.get_all_param_values(network)
batch_loss = 0
for batch in iterate_minibatches(X_train, y_train, batch_size, shuffle=False):
inputs, targets, index = batch
inputs = inputs.reshape(batch_size, 1, 40, 40, 40)
train_loss_before_all = []
affine_params_all = []
if Parallel_Search:
searchCandidate = 27
eachSearchCandidate = 3
eachDegree = 90.0 / eachSearchCandidate
for x in range(eachSearchCandidate):
x_degree = np.ones((batch_size * 10,), dtype=np.float32) * eachDegree * x - 45.0
for y in range(eachSearchCandidate):
y_degree = np.ones((batch_size * 10,), dtype=np.float32) * eachDegree * y - 45.0
for z in range(eachSearchCandidate):
z_degree = np.ones((batch_size * 10,), dtype=np.float32) * eachDegree * z - 45.0
affine_params[0].set_value(x_degree)
affine_params[1].set_value(y_degree)
affine_params[2].set_value(z_degree)
for i in range(10):
weightsOfParams = lasagne.layers.get_all_param_values(network)
train_loss, train_loss_before = train_affine_fn(inputs)
affine_params_all.append(np.array(weightsOfParams[:3]).reshape(1, 3, batch_size, 10))
train_loss_before_all.append(train_loss_before.reshape(1, batch_size, 10))
else:
searchCandidate = 200
affine_params[0].set_value(np.zeros((batch_size * 10,),
dtype=np.float32))
affine_params[1].set_value(np.zeros((batch_size * 10,),
dtype=np.float32))
affine_params[2].set_value(np.zeros((batch_size * 10,),
dtype=np.float32))
for i in range(searchCandidate):
weightsOfParams = lasagne.layers.get_all_param_values(network)
train_loss, train_loss_before = train_affine_fn(inputs)
affine_params_all.append(np.array(weightsOfParams[:3].reshape(1, 3, batch_size, 10)))
train_loss_before_all.append(train_loss_before.reshape(1, batch_size, 10))
train_loss_before_all = np.vstack(train_loss_before_all)
affine_params_all = np.vstack(affine_params_all)
train_loss_before_all_reshape = train_loss_before_all.reshape(searchCandidate, -1)
affine_params_all_reshape_x = affine_params_all[:, 0].reshape(searchCandidate, -1)
affine_params_all_reshape_y = affine_params_all[:, 1].reshape(searchCandidate, -1)
affine_params_all_reshape_z = affine_params_all[:, 2].reshape(searchCandidate, -1)
# Find the search candidate that gives the lowest loss
train_arg_min = np.argmin(train_loss_before_all_reshape, axis=0)
# According to the best search candidate, get the rotations.
affine_params_all_reshape_x = affine_params_all_reshape_x[train_arg_min, np.arange(train_arg_min.shape[0])]
affine_params_all_reshape_y = affine_params_all_reshape_y[train_arg_min, np.arange(train_arg_min.shape[0])]
affine_params_all_reshape_z = affine_params_all_reshape_z[train_arg_min, np.arange(train_arg_min.shape[0])]
cached_affine_matrix[0, index] = affine_params_all_reshape_x.reshape(-1, 10)
cached_affine_matrix[1, index] = affine_params_all_reshape_y.reshape(-1, 10)
cached_affine_matrix[2, index] = affine_params_all_reshape_z.reshape(-1, 10)
affine_train_batches += 1
batch_loss += np.mean(train_loss_before_all)
print(affine_train_batches)
print(batch_loss / affine_train_batches)
print (time.time() - start_time)
if 1:
for batch in iterate_minibatches(X_train, y_train, batch_size, shuffle=True):
inputs, targets, index = batch
affine_params[0].set_value(cached_affine_matrix[0, index].reshape(-1,))
affine_params[1].set_value(cached_affine_matrix[1, index].reshape(-1,))
affine_params[2].set_value(cached_affine_matrix[2, index].reshape(-1,))
inputs = inputs.reshape(batch_size, 1, 40, 40, 40)
train_loss_value, train_acc_value_1, train_acc_value_2 = train_model_fn(inputs, targets)
train_err += train_loss_value
train_acc_sum_1 += train_acc_value_1
train_acc_sum_2 += train_acc_value_2
train_batches += 1
# Then we print the results for this epoch:
print("Epoch {} of {} took {:.3f}s".format(
epoch + 1, num_epochs, time.time() - start_time))
print(" training loss:\t\t{:.6f}".format(train_err / train_batches))
print(" training acc 1:\t\t{:.6f}".format(train_acc_sum_1 / train_batches))
print(" training acc 2:\t\t{:.6f}".format(train_acc_sum_2 / train_batches))
if epoch % 21 == 0:
weightsOfParams = lasagne.layers.get_all_param_values(network)
np.save("../data/mnist_CNN_params_drop_out_Chi_2017_ROT_hinge_2000_em_new_batch_run_epoch_%d_3d_find_rotation.npy" % epoch, weightsOfParams)
def __init__(self, configFile):
self.logger = logging.getLogger(__name__)
self.configInfo = {}
execfile(configFile, self.configInfo)
assert self.configInfo['networkType'] == 'dilated3DNet'
self.networkType = 'dilated3DNet'
self.outputFolder = self.configInfo['outputFolder']
# ----------------------------------------------------------------------------------------
# For build Dilated3DNet.
self.preTrainedWeights = self.configInfo['preTrainedWeights']
# For displaying the output shape change process through the network.
self.modals = self.configInfo['modals']
self.inputChannels = len(self.modals)
self.trainSampleSize = self.configInfo['trainSampleSize']
self.kernelShapeList = self.configInfo['kernelShapeList']
self.kernelNumList = self.configInfo['kernelNumList']
self.dilatedFactorList = self.configInfo['dilatedFactorList']
self.numOfClasses = self.configInfo['numOfClasses']
self.dropoutRates = self.configInfo['dropoutRates']
assert len(self.kernelShapeList) == len(self.kernelNumList)
assert len(self.kernelShapeList) == len(self.dilatedFactorList)
assert self.numOfClasses == self.kernelNumList[-1]
self.inputShape = (None,
self.inputChannels,
None,
None,
None)
self.inputVar = T.tensor5('inputVar', dtype = theano.config.floatX)
self.targetVar = T.tensor4('targetVar', dtype = 'int32')
self.receptiveField = 'Only after building the dilated3DNet, can we get the receptive filed'
self.outputLayer = self.buildDilated3DNet()
self.restoreWeights()
# ----------------------------------------------------------------------------------------
# For comlile train function.
# We let the learning can be learnt
self.weightsFolder = self.configInfo['weightsFolder']
self.learningRate = theano.shared(np.array(self.configInfo['learningRate'],
dtype = theano.config.floatX))
self.learningRateDecay = np.array(self.configInfo['learningRateDecay'],
dtype = theano.config.floatX)
self.weightDecay = self.configInfo['weightDecay']
self.optimizerDict = {'rmsprop':rmsprop,
'momentum':momentum}
self.optimizer = self.optimizerDict[self.configInfo['optimizer']]
self.trainFunction = self.complieTrainFunction()
# ----------------------------------------------------------------------------------------
# For compile val function
self.valSampleSize = self.configInfo['valSampleSize']
self.valFunction = self.compileValFunction()
# ----------------------------------------------------------------------------------------
# For compile test function
self.testSampleSize = self.configInfo['testSampleSize']
self.testFunction = self.compileTestFunction()
def get_net(net_cfg, args):
# encoder, classification, decoder = net_cfg(...)
l_out_for_classifier, l_out_for_decimator, l_out_for_decoder = net_cfg(
args)
if args["dim"] == "2d":
X = T.tensor4('X')
Y = T.tensor4('Y')
elif args["dim"] == "3d":
X = T.tensor5('X')
Y = T.tensor5('Y')
net_out_for_classifier = get_output(l_out_for_classifier,
X) # returns the sigmoid masks
net_out_for_decimator = get_output(l_out_for_decimator, Y)
net_out_for_decoder = get_output(l_out_for_decoder, X)
loss_reconstruction = squared_error(net_out_for_decoder, X).mean()
loss_segmentation = binary_crossentropy(net_out_for_classifier,
net_out_for_decimator).mean()
if args["mode"] == "segmentation":
sys.stderr.write(
"mode = segmentation (loss_combined = loss_segmentation)\n")
loss_combined = loss_segmentation
elif args["mode"] == "mixed":
sys.stderr.write(
"mode = mixed (loss_combined = loss_segmentation + loss_reconstruction)\n"
)
loss_combined = loss_segmentation + loss_reconstruction
params = get_all_params(
l_out_for_decoder, trainable=True
) # this needs to be fixed for when we do future prediction
lr = theano.shared(floatX(args["learning_rate"]))
if "optim" not in args:
updates = nesterov_momentum(loss_combined,
params,
learning_rate=lr,
momentum=0.9)
else:
if args["optim"] == "rmsprop":
sys.stderr.write("using rmsprop optimisation\n")
updates = rmsprop(loss_combined, params, learning_rate=lr)
elif args["optim"] == "adam":
sys.stderr.write("using adam optimisation\n")
updates = adam(loss_combined, params, learning_rate=lr)
# todo: fix [loss,loss]
train_fn = theano.function(
[X, Y], [loss_reconstruction, loss_segmentation, loss_combined],
updates=updates,
on_unused_input='warn')
loss_fn = theano.function(
[X, Y], [loss_reconstruction, loss_segmentation, loss_combined],
on_unused_input='warn')
classifier_out_fn = theano.function([X],
net_out_for_classifier,
on_unused_input='warn')
decoder_out_fn = theano.function([X],
net_out_for_decoder,
on_unused_input='warn')
return {
"train_fn": train_fn,
"loss_fn": loss_fn,
"classifier_out_fn": classifier_out_fn,
"decoder_out_fn": decoder_out_fn,
"lr": lr,
"l_out_for_classifier": l_out_for_classifier,
"l_out_for_decimator": l_out_for_decimator,
"l_out_for_decoder": l_out_for_decoder
}
def compile_theano_functions(self, data_type='2D', loss='cross_entropy'):
assert self.net != None
### symbolic theano input
theano_args = OrderedDict()
dim = len(self.cf.dim)
if data_type == '2D':
assert dim == 2
theano_args['X'] = T.tensor4()
theano_args['y'] = T.tensor4()
theano_args['X'].tag.test_value = np.random.rand(
20, 1, 256, 256).astype('float32')
self.logger.info('Net: Working with 2D data.')
val_args = deepcopy(theano_args)
train_args = deepcopy(theano_args)
train_args['lr'] = T.scalar(name='lr')
### prediction functions
# get flattened softmax prediction of shape (pixels, classes), where pixels = b*0*1
prediction_train_smax_flat = get_output(
self.net[self.cf.out_layer_flat],
train_args['X'],
deterministic=False)
prediction_val_smax_flat = get_output(
self.net[self.cf.out_layer_flat],
val_args['X'],
deterministic=True)
# reshape softmax prediction: shapes (pixels,c) -> (b,c,0,1)
prediction_train_smax = prediction_train_smax_flat.reshape(
(train_args['X'].shape[0], self.cf.out_dim[0],
self.cf.out_dim[1], self.cf.num_classes)).transpose(
(0, 3, 1, 2))
prediction_val_smax = prediction_val_smax_flat.reshape(
(val_args['X'].shape[0], self.cf.out_dim[0],
self.cf.out_dim[1], self.cf.num_classes)).transpose(
(0, 3, 1, 2))
self.predict_smax['train'] = theano.function([train_args['X']],
prediction_train_smax)
self.predict_smax['val'] = theano.function([val_args['X']],
prediction_val_smax)
# reshape target vector: shapes (b,c,0,1) -> (b*0*1,c)
flat_target_train = train_args['y'].transpose(
(0, 2, 3, 1)).reshape((-1, self.cf.num_classes))
flat_target_val = val_args['y'].transpose((0, 2, 3, 1)).reshape(
(-1, self.cf.num_classes))
elif data_type == '3D':
assert dim == 3
theano_args['X'] = T.tensor5()
theano_args['y'] = T.tensor5()
self.logger.info('Net: Working with 3D data.')
val_args = deepcopy(theano_args)
train_args = deepcopy(theano_args)
train_args['lr'] = T.scalar(name='lr')
### prediction functions
# get flattened softmax prediction of shape (pixels, classes), where pixels = b*0*1*2
prediction_train_smax_flat = get_output(
self.net[self.cf.out_layer_flat],
train_args['X'],
deterministic=False)
prediction_val_smax_flat = get_output(
self.net[self.cf.out_layer_flat],
val_args['X'],
deterministic=True)
# reshape softmax prediction: shapes (pixels,c) -> (b,c,0,1,2)
prediction_train_smax = prediction_train_smax_flat.reshape(
(train_args['X'].shape[0], self.cf.dim[0], self.cf.dim[1],
self.cf.dim[2], self.cf.num_classes)).transpose(
(0, 4, 1, 2, 3))
prediction_val_smax = prediction_val_smax_flat.reshape(
(val_args['X'].shape[0], self.cf.dim[0], self.cf.dim[1],
self.cf.dim[2], self.cf.num_classes)).transpose(
(0, 4, 1, 2, 3))
self.predict_smax['train'] = theano.function([train_args['X']],
prediction_train_smax)
self.predict_smax['val'] = theano.function([val_args['X']],
prediction_val_smax)
# reshape target vector: shapes (b,c,0,1,2) -> (b*0*1*2,c)
flat_target_train = train_args['y'].transpose(
(0, 2, 3, 4, 1)).reshape((-1, self.cf.num_classes))
flat_target_val = val_args['y'].transpose((0, 2, 3, 4, 1)).reshape(
(-1, self.cf.num_classes))
pred_train_one_hot = get_one_hot_prediction(prediction_train_smax,
self.cf.num_classes)
pred_val_one_hot = get_one_hot_prediction(prediction_val_smax,
self.cf.num_classes)
self.predict_one_hot['val'] = theano.function([val_args['X']],
pred_val_one_hot)
self.predict_one_hot['train'] = theano.function([train_args['X']],
pred_train_one_hot)
prediction_val = T.argmax(prediction_val_smax, axis=1)
prediction_train = T.argmax(prediction_train_smax, axis=1)
self.predict['val'] = theano.function([val_args['X']], prediction_val)
self.predict['train'] = theano.function([train_args['X']],
prediction_train)
### evaluation metrics
train_dices_hard = binary_dice_per_instance_and_class(
pred_train_one_hot, train_args['y'], dim)
val_dices_hard = binary_dice_per_instance_and_class(
pred_val_one_hot, val_args['y'], dim)
train_dices_soft = binary_dice_per_instance_and_class(
prediction_train_smax, train_args['y'], dim)
val_dices_soft = binary_dice_per_instance_and_class(
prediction_val_smax, val_args['y'], dim)
### loss types
if loss == 'cross_entropy':
self.loss['train'] = categorical_crossentropy(
prediction_train_smax_flat, flat_target_train).mean()
self.loss['val'] = categorical_crossentropy(
prediction_val_smax_flat, flat_target_val).mean()
if loss == 'weighted_cross_entropy':
theano_args['w'] = T.fvector()
train_args['w'] = T.fvector()
train_loss = categorical_crossentropy(prediction_train_smax_flat,
flat_target_train)
train_loss *= train_args['w']
self.loss['train'] = train_loss.mean()
val_args['w'] = T.fvector()
val_loss = categorical_crossentropy(prediction_val_smax_flat,
flat_target_val)
val_loss *= val_args['w']
self.loss['val'] = val_loss.mean()
if loss == 'dice':
self.loss['train'] = 1 - train_dices_soft.mean()
self.loss['val'] = 1 - val_dices_soft.mean()
self.logger.info('Net: Using {} loss.'.format(loss))
if self.cf.use_weight_decay:
training_loss = self.loss['train'] +\
self.cf.weight_decay * lasagne.regularization.regularize_network_params(self.net[self.cf.out_layer_flat],
lasagne.regularization.l2)
self.logger.info('Net: Using weight decay of {}.'.format(
self.cf.weight_decay))
else:
training_loss = self.loss['train']
### training functions
params = get_all_params(self.net[self.cf.out_layer_flat],
trainable=True)
grads = theano.grad(training_loss, params)
updates = adam(grads, params, learning_rate=train_args['lr'])
self.train_fn = theano.function(train_args.values(),
[self.loss['train'], train_dices_hard],
updates=updates)
self.val_fn = theano.function(val_args.values(),
[self.loss['val'], val_dices_hard])
self.logger.info('Net: Compiled theano functions.')
def __init__(
self,
input_shape,
output_dim,
hidden_sizes,
conv_filters,
conv_filter_sizes,
conv_strides,
conv_pads,
hidden_nonlinearity=LN.tanh,
output_pi_nonlinearity=LN.softmax,
conv_W_init=LI.GlorotUniform(),
hidden_W_init=NormCInit(1.0),
output_pi_W_init=NormCInit(0.01), # (like in OpenAI baselines)
output_v_W_init=NormCInit(1.0),
all_b_init=LI.Constant(0.),
hidden_h_init=LI.Constant(0.),
hidden_init_trainable=False,
pixel_scale=255.,
input_var=None,
name=None,
):
if name is None:
prefix = ""
else:
prefix = name + "_"
if input_var is None:
# NOTE: decide whether to provide frame history in each obs
input_var = T.tensor5('input', dtype='uint8')
step_input_var = T.tensor4('step_input', dtype='uint8')
assert input_var.ndim == 5
assert len(input_shape) == 3
# First, build the TRAINING layers. ###################################
l_in = L.InputLayer(shape=(None, None) + input_shape,
input_var=input_var)
x = ScalarFixedScaleLayer(l_in, scale=pixel_scale, name='pixel_scale')
# Reshape leading dimensions for convolution (n_batch x n_step)
n_batch, n_step = x.shape[0], x.shape[1]
x = L.reshape(x, (n_batch * n_step, ) + input_shape)
ls_conv = list()
for i, (n_filters, size, stride, pad) in enumerate(
zip(conv_filters, conv_filter_sizes, conv_strides, conv_pads)):
x = L.Conv2DLayer(
x,
num_filters=n_filters,
filter_size=size,
stride=(stride, stride),
pad=pad,
nonlinearity=hidden_nonlinearity,
W=conv_W_init,
b=all_b_init,
name="%sconv_hidden_%d" % (prefix, i),
)
ls_conv.append(x)
l_conv_out = x
# Reshape leading dimensions for recurrence, might as well flatten trailing
x = L.reshape(x, [n_batch, n_step, -1])
ls_recurrent = list()
ls_prev_hidden = list()
for i, hidden_size in enumerate(hidden_sizes):
l_prev_hidden = L.InputLayer(shape=(None, ) + hidden_size)
x = RecurrentLayer(
incomings=(x, l_prev_hidden),
num_units=hidden_size,
nonlinearity=hidden_nonlinearity,
name="%shidden_recurrent_%d" % (prefix, i),
W_xh=hidden_W_init,
W_hh=hidden_W_init,
b=all_b_init,
h0=hidden_h_init,
h0_trainable=hidden_init_trainable,
)
ls_prev_hidden.append(l_prev_hidden)
ls_recurrent.append(x)
l_out_pi = L.DenseLayer(
x,
num_units=output_dim,
nonlinearity=output_pi_nonlinearity,
name="%soutput_pi" % (prefix, ),
W=output_pi_W_init,
b=all_b_init,
)
l_out_pi = L.reshape(l_out_pi, [n_batch, n_step, output_dim])
l_out_v = L.DenseLayer(
x,
num_units=1,
nonlinearity=LN.linear,
name="%soutput_v" % (prefix, ),
W=output_v_W_init,
b=all_b_init,
)
l_out_v = L.reshape(l_out_v, [n_batch, n_step])
# Second, repeat for one-step INFERENCE layers (no time dimension) ####
# (yes this is annoying)
# Needed because input has different n_dim, and different reshaping
# throughout.
l_step_in = L.InputLayer(shape=(None, ) + input_shape,
input_var=step_input_var)
x_step = ScalarFixedScaleLayer(l_step_in,
scale=pixel_scale,
name='step_pixel_scale')
for i, (n_filters, size, stride, pad) in enumerate(
zip(conv_filters, conv_filter_sizes, conv_strides, conv_pads)):
x_step = L.Conv2DLayer(
x_step,
num_filters=n_filters,
filter_size=size,
stride=(stride, stride),
pad=pad,
nonlinearity=hidden_nonlinearity,
W=ls_conv[i].W, # must use the same parameter variable
b=ls_conv[i].b,
name="%sconv_hidden_step_%d" % (prefix, i),
)
l_step_conv_out = x_step
ls_step_hidden = list()
for i, hidden_size in enumerate(hidden_sizes):
x_step = RecurrentLayer(
incomings=(x_step, ls_prev_hidden[i]),
num_units=hidden_size,
nonlinearity=hidden_nonlinearity,
name="%shidden_step_%d" % (prefix, i),
W_xh=ls_recurrent[i].W_xh,
W_hh=ls_recurrent[i].W_hh,
b=ls_recurrent[i].b,
h0=ls_recurrent[i].h0,
h0_trainable=hidden_init_trainable,
)
ls_step_hidden.append(x_step)
l_step_pi = L.DenseLayer(
x_step,
num_units=output_dim,
nonlinearity=output_pi_nonlinearity,
W=l_out_pi.W,
b=l_out_pi.b,
)
l_step_v = L.DenseLayer(
x_step,
num_units=1,
nonlinearity=LN.linear,
W=l_out_v.W,
b=l_out_v.b,
)
l_step_v = L.reshape(l_step_v, [-1])
self._l_out_pi = l_out_pi
self._l_out_v = l_out_v
self._l_in = l_in
self._l_conv_out = l_conv_out
self._ls_recurrent = ls_recurrent
self._ls_prev_hidden = ls_prev_hidden
self._l_step_in = l_step_in
self._ls_step_hidden = ls_step_hidden
self._l_step_pi = l_step_pi
self._l_step_v = l_step_v
self._l_step_conv_out = l_step_conv_out
net = build_model(weights_path, options)
# iterate through all test scans
for t1, current_scan in zip(t1_test_paths, folder_names):
t = test_scan(net, t1, options)
print " --> tested subject :", current_scan, "(elapsed time:", t, "min.)"
#### Batch iteration functions
# In[ ]:
from utils import iterate_minibatches, iterate_minibatches_train
# In[ ]:
input_var = T.tensor5(name='input', dtype='float32')
target_var = T.ivector()
input_var2 = T.matrix(name='input2', dtype='float32')
#input_var2 = T.vector2(name='input2', dtype='float32')
#### Network definition
# In[ ]:
def build_net():
"""Method for VoxResNet Building.
Returns
-------
dictionary
def compile_theano_functions(self, data_type='2D', loss='cross_entropy'):
assert self.net != None
### symbolic theano input
theano_args = OrderedDict()
dim = len(self.cf.dim)
if data_type == '2D':
assert dim == 2
theano_args['X'] = T.tensor4()
theano_args['y'] = T.ivector()
self.logger.info('Net: Working with 2D data.')
elif data_type == '3D':
assert dim == 3
theano_args['X'] = T.tensor5()
theano_args['y'] = T.ivector()
self.logger.info('Net: Working with 3D data.')
val_args = deepcopy(theano_args)
train_args = deepcopy(theano_args)
train_args['lr'] = T.scalar(name='lr')
### prediction functions
# get softmax prediction of shape (b, classes)
prediction_train_smax = get_output(self.net[self.cf.out_layer],
train_args['X'],
deterministic=False)
prediction_val_smax = get_output(self.net[self.cf.out_layer],
val_args['X'],
deterministic=True)
self.predict_smax['train'] = theano.function([train_args['X']],
prediction_train_smax)
self.predict_smax['val'] = theano.function([val_args['X']],
prediction_val_smax)
# get one hot encoded target vector
one_hot_target_train = get_one_hot_class_target(
train_args['y'], self.cf.num_classes)
one_hot_target_val = get_one_hot_class_target(val_args['y'],
self.cf.num_classes)
### cross entropy loss
if loss == 'cross_entropy':
self.loss['train'] = categorical_crossentropy(
prediction_train_smax, one_hot_target_train).mean()
self.loss['val'] = categorical_crossentropy(
prediction_val_smax, one_hot_target_val).mean()
if self.cf.use_weight_decay:
training_loss = self.loss['train'] +\
self.cf.weight_decay * lasagne.regularization.regularize_network_params(self.net[self.cf.out_layer],
lasagne.regularization.l2)
self.logger.info('Net: Using weight decay of {}.'.format(
self.cf.weight_decay))
else:
training_loss = self.loss['train']
### accuracy
train_acc = T.mean(
T.eq(T.argmax(prediction_train_smax, axis=1), train_args['y']))
val_acc = T.mean(
T.eq(T.argmax(prediction_val_smax, axis=1), val_args['y']))
### training functions
params = get_all_params(self.net[self.cf.out_layer], trainable=True)
grads = theano.grad(training_loss, params)
updates = adam(grads, params, learning_rate=train_args['lr'])
self.train_fn = theano.function(train_args.values(),
[self.loss['train'], train_acc],
updates=updates)
self.val_fn = theano.function(
val_args.values(),
[self.loss['val'], val_acc, prediction_val_smax])
self.logger.info('Net: Compiled theano functions.')
def build_network(self):
self.input_var = tensor5()
self.output_var = matrix()
net = OrderedDict()
if self.instance_norm:
norm_fct = batch_norm
norm_kwargs = {'axes': (2, 3, 4)}
else:
norm_fct = batch_norm
norm_kwargs = {'axes': 'auto'}
self.input_layer = net['input'] = InputLayer(
(self.batch_size, self.n_input_channels, self.input_dim[0],
self.input_dim[1], self.input_dim[2]), self.input_var)
net['contr_1_1'] = norm_fct(
Conv3DLayer(net['input'],
self.base_n_filters,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
net['contr_1_2'] = norm_fct(
Conv3DLayer(net['contr_1_1'],
self.base_n_filters,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
net['pool1'] = Pool3DLayer(net['contr_1_2'], (1, 2, 2))
net['contr_2_1'] = norm_fct(
Conv3DLayer(net['pool1'],
self.base_n_filters * 2,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
net['contr_2_2'] = norm_fct(
Conv3DLayer(net['contr_2_1'],
self.base_n_filters * 2,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
l = net['pool2'] = Pool3DLayer(net['contr_2_2'], (1, 2, 2))
if self.dropout is not None:
l = DropoutLayer(l, p=self.dropout)
net['contr_3_1'] = norm_fct(
Conv3DLayer(l,
self.base_n_filters * 4,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
net['contr_3_2'] = norm_fct(
Conv3DLayer(net['contr_3_1'],
self.base_n_filters * 4,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
l = net['pool3'] = Pool3DLayer(net['contr_3_2'], (1, 2, 2))
if self.dropout is not None:
l = DropoutLayer(l, p=self.dropout)
net['contr_4_1'] = norm_fct(
Conv3DLayer(l,
self.base_n_filters * 8,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
net['contr_4_2'] = norm_fct(
Conv3DLayer(net['contr_4_1'],
self.base_n_filters * 8,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
l = net['pool4'] = Pool3DLayer(net['contr_4_2'], (1, 2, 2))
if self.dropout is not None:
l = DropoutLayer(l, p=self.dropout)
net['encode_1'] = norm_fct(
Conv3DLayer(l,
self.base_n_filters * 16,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
l = net['encode_2'] = norm_fct(
Conv3DLayer(net['encode_1'],
self.base_n_filters * 16,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
net['upscale1'] = Upscale3DLayer(l, (1, 2, 2))
l = net['concat1'] = ConcatLayer([net['upscale1'], net['contr_4_2']],
cropping=(None, None, "center",
"center", "center"))
if self.dropout is not None:
l = DropoutLayer(l, p=self.dropout)
net['expand_1_1'] = norm_fct(
Conv3DLayer(l,
self.base_n_filters * 8,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
l = net['expand_1_2'] = norm_fct(
Conv3DLayer(net['expand_1_1'],
self.base_n_filters * 8,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
net['upscale2'] = Upscale3DLayer(l, (1, 2, 2))
l = net['concat2'] = ConcatLayer([net['upscale2'], net['contr_3_2']],
cropping=(None, None, "center",
"center", "center"))
if self.dropout is not None:
l = DropoutLayer(l, p=self.dropout)
net['expand_2_1'] = norm_fct(
Conv3DLayer(l,
self.base_n_filters * 4,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
ds2 = l = net['expand_2_2'] = norm_fct(
Conv3DLayer(net['expand_2_1'],
self.base_n_filters * 4,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
net['upscale3'] = Upscale3DLayer(l, (1, 2, 2))
l = net['concat3'] = ConcatLayer([net['upscale3'], net['contr_2_2']],
cropping=(None, None, "center",
"center", "center"))
if self.dropout is not None:
l = DropoutLayer(l, p=self.dropout)
net['expand_3_1'] = norm_fct(
Conv3DLayer(l,
self.base_n_filters * 2,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
l = net['expand_3_2'] = norm_fct(
Conv3DLayer(net['expand_3_1'],
self.base_n_filters * 2,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
net['upscale4'] = Upscale3DLayer(l, (1, 2, 2))
net['concat4'] = ConcatLayer([net['upscale4'], net['contr_1_2']],
cropping=(None, None, "center", "center",
"center"))
net['expand_4_1'] = norm_fct(
Conv3DLayer(net['concat4'],
self.base_n_filters,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
net['expand_4_2'] = norm_fct(
Conv3DLayer(net['expand_4_1'],
self.base_n_filters,
3,
nonlinearity=self.nonlinearity,
pad=self.pad,
W=lasagne.init.HeNormal(gain="relu")), **norm_kwargs)
net['output_segmentation'] = Conv3DLayer(net['expand_4_2'],
self.num_classes,
1,
nonlinearity=None)
ds2_1x1_conv = Conv3DLayer(ds2,
self.num_classes,
1,
1,
'same',
nonlinearity=lasagne.nonlinearities.linear,
W=lasagne.init.HeNormal(gain='relu'))
ds1_ds2_sum_upscale = Upscale3DLayer(ds2_1x1_conv, (1, 2, 2))
ds3_1x1_conv = Conv3DLayer(net['expand_3_2'],
self.num_classes,
1,
1,
'same',
nonlinearity=lasagne.nonlinearities.linear,
W=lasagne.init.HeNormal(gain='relu'))
ds1_ds2_sum_upscale_ds3_sum = ElemwiseSumLayer(
(ds1_ds2_sum_upscale, ds3_1x1_conv))
ds1_ds2_sum_upscale_ds3_sum_upscale = Upscale3DLayer(
ds1_ds2_sum_upscale_ds3_sum, (1, 2, 2))
self.seg_layer = l = ElemwiseSumLayer(
(net['output_segmentation'], ds1_ds2_sum_upscale_ds3_sum_upscale))
net['dimshuffle'] = DimshuffleLayer(l, (0, 2, 3, 4, 1))
batch_size, n_z, n_rows, n_cols, _ = lasagne.layers.get_output(
net['dimshuffle']).shape
net['reshapeSeg'] = ReshapeLayer(
net['dimshuffle'],
(batch_size * n_rows * n_cols * n_z, self.num_classes))
self.output_layer = net['output_flattened'] = NonlinearityLayer(
net['reshapeSeg'], nonlinearity=lasagne.nonlinearities.softmax)
data_gen_train = segDataAugm.elastric_transform_generator(data_gen_train, 900, 12) data_gen_train = segDataAugm.mirror_axis_generator(data_gen_train) data_gen_train = segDataAugm.center_crop_generator(data_gen_train, CROP_PATCHES_TO_THIS) data_gen_train = segDataAugm.center_crop_seg_generator(data_gen_train, OUTPUT_PATCH_SIZE) data_gen_train = MultiThreadedGenerator(data_gen_train, 8, 8) data_gen_train._start() net = build_UNet3D(5, BATCH_SIZE, num_output_classes=num_classes, base_n_filters=16, input_dim=CROP_PATCHES_TO_THIS, pad=0) output_layer_for_loss = net["output_flattened"] n_batches_per_epoch = 300 # n_batches_per_epoch = np.floor(n_training_samples/float(BATCH_SIZE)) n_test_batches = 30 # n_test_batches = np.floor(n_val_samples/float(BATCH_SIZE)) x_sym = T.tensor5() seg_sym = T.ivector() w_sym = T.vector() # add some weight decay l2_loss = lasagne.regularization.regularize_network_params(output_layer_for_loss, lasagne.regularization.l2) * 1e-5 # the distinction between prediction_train and test is important only if we enable dropout prediction_train = lasagne.layers.get_output(output_layer_for_loss, x_sym, deterministic=False) # we could use a binary loss but I stuck with categorical crossentropy so that less code has to be changed if your # application has more than two classes loss_vec = lasagne.objectives.categorical_crossentropy(prediction_train, seg_sym) loss_vec *= w_sym loss = loss_vec.mean() loss += l2_loss acc_train = T.mean(T.eq(T.argmax(prediction_train, axis=1), seg_sym), dtype=theano.config.floatX)
X_train, y_train, X_test, y_test = load_data("/X_train.npy", "/Y_train.npy", "/X_test.npy", "/Y_test.npy")
X_train_2d = X_train.reshape(X_train.shape[0], 1, 28, 28, 1)
X_train_3d = np.zeros((X_train.shape[0], 1, 40, 40, 40))
X_train_3d[:, :, 6:34, 6:34, 17:23] = X_train_2d
X_train_3d = np.array(X_train_3d, dtype = np.float32)
X_test_2d = X_test.reshape(X_test.shape[0], 1, 28, 28, 1)
X_test_3d = np.zeros((X_test.shape[0], 1, 40, 40, 40))
X_test_3d[:, :, 6:34, 6:34, 17:23] = X_test_2d
X_test_3d = np.array(X_test_3d, dtype = np.float32)
input_var = T.tensor5('inputs')
network = build_cnn(input_var, 100)
network_output = lasagne.layers.get_output(network)
get_rotated = theano.function([input_var], network_output)
# Start Creating training 3d MNIST Data
image_result_list = []
for i in range(X_train_3d.shape[0] // 100):
x_degree = np.random.randint(-45, 45, 100).reshape(100,)
y_degree = np.random.randint(-45, 45, 100).reshape(100,)
z_degree = np.random.randint(-45, 45, 100).reshape(100,)
lasagne.layers.set_all_param_values(network, [np.array(x_degree,dtype=np.float32),
np.array(y_degree,dtype=np.float32),
np.array(z_degree,dtype=np.float32)])
image_result = get_rotated(X_train_3d[100 * i : 100 * (i+1)])
input_shape = (None, None, Convlayersize[-4], Convlayersize[-4],
Convlayersize[-4])
filter_shape = (Channel[-4], Channel[-5], kernal[-4], kernal[-4],
kernal[-4])
GlX = sigmoid(
conv(Gl4,
wx,
filter_shape=filter_shape,
input_shape=input_shape,
conv_mode='deconv'))
return GlX
X = T.tensor5()
Z = T.matrix()
gX = gen(Z, *gen_params)
print 'COMPILING'
t = time()
# _train_g = theano.function([X, Z, Y], cost, updates=g_updates)
# _train_d = theano.function([X, Z, Y], cost, updates=d_updates)
_gen = theano.function([Z], gX)
print '%.2f seconds to compile theano functions' % (time() - t)
# trX, trY, ntrain = load_shapenet_train()
n = 10
nbatch = 10
rng = np.random.RandomState(int(time()))
def interpolate(config_file, *args):
net = DeepLTE(config_file)
mon = nn.monitor.Monitor(config_file)
mon.dump_model(net)
X__ = T.tensor5('input', theano.config.floatX)
X = X__[0]
X_nodes = X[net.nodes]
X_targets = X[net.targets]
X_recon = T.concatenate((X_nodes, X_targets))
X_ = theano.shared(
np.zeros((
1,
net.num_frames,
) + net.input_tensor_shape[1:], 'float32'), 'input_placeholder')
dm = VideoManager(config_file, X_)
# training costs
net.set_training_status(True)
lr_ = theano.shared(net.learning_rate, 'learning rate')
updates, cost, psnr = net.learn(X_nodes,
X_recon,
lambda1=1.,
lambda2=1e-3,
lambda3=1e-4,
learning_rate=lr_)
optimize = nn.compile([], [cost, psnr],
updates=updates,
givens={X__: X_},
name='optimize deepLTE')
# testing cost
net.set_training_status(False)
W = T.scalar('pos', 'float32')
new_frame = net(X_nodes, W)
test = nn.compile([W], new_frame, givens={X__: X_}, name='test deepLTE')
# training scheme
last_seq_cost = -np.inf
for seq, _ in enumerate(dm.get_batches()):
print('Interpolating sequence %d' % (seq + 1))
iteration = 0
cost = 1e10
start_time = time.time()
while iteration < net.n_epochs:
iteration += 1
_recon_cost, _psnr = optimize()
if np.isnan(_recon_cost) or np.isinf(_recon_cost):
raise ValueError('Training failed.')
cost = _recon_cost
if iteration % net.validation_frequency == 0:
mon.plot('reconstruction train cost %d' % (seq + 1),
_recon_cost)
mon.plot('train psnr %d' % (seq + 1), _psnr)
mon.plot('time elapsed %d' % (seq + 1),
(time.time() - start_time) / 60.)
mon.flush()
mon.tick()
if cost < last_seq_cost:
break
for idx, pos in enumerate(np.array(net.interps, dtype='float32')):
img = test(pos)
mon.save_image('%d %d' % (seq + 1, idx), img, dm.unnormalize)
mon.flush()
if seq == 0:
last_seq_cost = cost
def get_rcnn_kwargs(input_width, input_height,
num_channels,
conv_num_filters,
conv_filter_size,
pool_size, rec_num_units,
p_dropout=0.5,
learning_rate=1e-3,
recurrent_layer_type=MILSTMLayer,
**kwargs):
# Select number of gradient steps to be used for BPTT
if 'gradient_steps' not in kwargs:
gradient_steps = -1
else:
gradient_steps = kwargs['gradient_steps']
# Input shape is (batch_size, sequence_length, num_channels,
# input_height, input_width)
input_shape = (None, None, num_channels, input_height, input_width,)
# Define input layer
l_in = lasagne.layers.InputLayer(input_shape)
# symbolic variable for the input of the layer
input_var = l_in.input_var
# symbolic variables representing the size of the layer
bsize, seqlen, _, _, _ = input_var.shape
# Reshape layer for convolutional stage
l_reshape_1 = lasagne.layers.ReshapeLayer(
l_in, (-1, num_channels, input_height, input_width))
# Convolutional stage
l_conv = lasagne.layers.Conv2DLayer(l_reshape_1, conv_num_filters,
conv_filter_size,
nonlinearity=None, b=None)
# Add bias and nonlinearities (so that they don't get included
# in the computation of the gradient in the inverse layer
# np.random.seed(84)
# bias = np.random.rand(conv_num_filters).astype(floatX) % 0.1
l_conv_b = lasagne.layers.BiasLayer(l_conv) # , b=bias)
l_conv_nl = lasagne.layers.NonlinearityLayer(l_conv_b,
nonlinearity=nonlinearities.sigmoid)
# Max pooling layer
l_pool = lasagne.layers.MaxPool2DLayer(l_conv_nl,
pool_size=pool_size)
# Dropout layer
l_dropout = lasagne.layers.DropoutLayer(l_pool,
p_dropout)
# output shape for the convolutional stage
out_shape = l_pool.output_shape
# Reshape layer for recurrent stage
# the shape is now (batch_size, sequence_length, num_channels * input_width *
# input_height)
l_reshape_2 = lasagne.layers.ReshapeLayer(
l_dropout, (bsize, seqlen, np.prod(out_shape[1:])))
# Recurrent stage
l_rec = recurrent_layer_type(
l_reshape_2, rec_num_units)
# Decoding stage
l_rec_d = recurrent_layer_type(
l_rec, num_units=l_rec.input_shapes[0][-1])
# Reshape output for decoding convolutional layers
l_reshape_3 = lasagne.layers.ReshapeLayer(
l_rec_d, (bsize * seqlen, ) + out_shape[1:])
# Invert pool layer
l_inv_pool = lasagne.layers.InverseLayer(l_reshape_3, l_pool)
# Invert convolutional layers
l_inv_conv = lasagne.layers.InverseLayer(l_inv_pool, l_conv)
# Add nonlinearity
# l_inv_conv_nl = l_inv_conv
l_inv_conv_nl = lasagne.layers.NonlinearityLayer(l_inv_conv,
nonlinearity=nonlinearities.sigmoid)
# Output layer (with same shape as the input)
l_out = lasagne.layers.ReshapeLayer(
l_inv_conv_nl, (bsize, seqlen, num_channels, input_height, input_width))
target = T.tensor5()
# Mask output
# Are binary masks necessary?
deterministic_out = myMask(
lasagne.layers.get_output(l_out, deterministic=True),
input_var)
stochastic_out = myMask(lasagne.layers.get_output(l_out),
input_var)
# Get parameters
params = lasagne.layers.get_all_params(l_out, trainable=True)
# Compute training and validation losses
stochastic_loss = lasagne.objectives.binary_crossentropy(
stochastic_out, target).mean()
stochastic_loss.name = 'stochastic loss'
deterministic_loss = lasagne.objectives.binary_crossentropy(
deterministic_out, target).mean()
deterministic_loss.name = 'deterministic loss'
# Compute updates
updates = lasagne.updates.rmsprop(
stochastic_loss, params, learning_rate=learning_rate)
train_loss = [stochastic_loss]
valid_loss = [deterministic_loss]
return dict(l_in=l_in, l_out=l_out,
train_loss=train_loss,
valid_loss=valid_loss,
# input_var=input_var,
target=target, updates=updates,
predictions=deterministic_out,
gradient_steps=gradient_steps,
model_type='RNN')
def __init__(self, image_shp, layer_params):
"""
Для инициализации требуется указать размер входных изображений
и параметры для каждого сверточного слоя.
Для каждого слоя свертки автоматически генерируется
слой транспонированной свертки как обратный.
Пример:
Пусть cl_1, cl_2 - сверточные слои. Тогда будет построена
сеть X->cl_1->cl_2->dcl_2->dcl_1->Y, где dcl_i = (cl_i)^{-1}.
В сети используются skip-connections: если X проходит через cl_i,
то на выходе получается X'. Тогда на вход dcl_i подается результат,
полученный на предыдущем слое + X'.
Такая архитектура помогает решить проблему исчезающего градиента.
:param image_shp: размер входных изображений (None, 1, 3, h, w)
Если 0-ой элемент != None, то он все равно заменится
:param layer_params: список параметров для conv слоев
- число и размер фильтра (count, size)
- border 'valid' | 'full' | (d,h,w)
- subsample (d,h,w)
- dilation пока не используется
"""
# размер входных изображений хранится отдельно:
# это нужно для валидации загруженного объекта Nnet из .save файла
self.input_shape = image_shp
# заполним значениями по умолчанию None-ы
# layer_params = self.complete_layer_params(layer_params)
# параметры, которые уже известны
# self.filter_shps, self.border_shps, \
# self.subsamples, self.dilations = list(zip(*layer_params))
# эти параметры будут вычисляться
self.image_shps = []
self.c_layers = []
self.dc_layers = []
# символьные переменные
input = T.tensor5('input', dtype=th.config.floatX)
expected = T.tensor5('expected', dtype=th.config.floatX)
self.x = input
self.y = expected
# инициализация слоев свертки
x = input
i_shp = (None, *image_shp[1:])
# for (count, size), border, subsample, dilation in layer_params:
for param in layer_params:
print(str(param))
self.image_shps.append(i_shp)
count, size = param['filter_shape']
f_shp = (count, i_shp[1], i_shp[2], size, size)
param['filter_shape'] = f_shp
param['image_shape'] = i_shp
# cl = ConvLayer3D(np.random, x, f_shp, i_shp, border, subsample)
cl = ConvLayer3D(np.random, x, **param)
self.c_layers.append(cl)
x = cl.output
i_shp = cl.output_shp()
# инициализация слоев транспонированной свертки
# for i, (((count, size), border, subsample, dilation), i_shp, c_l) \
# in enumerate(zip(reversed(layer_params),
# reversed(self.image_shps),
# reversed(self.c_layers))):
for i, (param, c_l) in enumerate(
zip(reversed(layer_params), reversed(self.c_layers))):
# f_shp = (count, i_shp[1], i_shp[2], size, size)
# dcl = DeconvLayer3D(np.random, x, f_shp, i_shp, border, subsample)
dcl = DeconvLayer3D(np.random, x, **param)
self.dc_layers.append(dcl)
x = dcl.output + c_l.input \
if i < len(layer_params) - 1 else dcl.output
# результат применения сети к случайному изображению
result = T.nnet.relu(x)
self.func = th.function([input], result)
cost = T.square(result - expected).mean() / 2
self.cost = cost
# результат применения сети к изображению,
# для которого известен желаемый результат, и оценка
self.check = th.function(
[input, expected],
[result, cost],
)
params = [l.W for l in self.c_layers + self.dc_layers] \
+ [l.b for l in self.c_layers + self.dc_layers]
self.params = params
grads = T.grad(cost, params)
self.grads = grads
self.train_stop = False
print('inited')