def QNetwork(input_var):
"""
This sets up a network in Lasagne that decides on what move to play
"""
n_actions = 2
from lasagne.layers import batch_norm
from lasagne.layers import DenseLayer
from lasagne.layers import InputLayer
from lasagne.nonlinearities import rectify, linear, sigmoid, softmax, tanh
from lasagne.init import GlorotNormal
network = InputLayer(shape=(None, 4), input_var=input_var, name='Input')
network = (DenseLayer(incoming=network,
num_units=24,
nonlinearity=rectify,
W=GlorotNormal()))
network = (
DenseLayer(incoming=network,
num_units=24,
nonlinearity=rectify,
W=GlorotNormal())
# W=lasagne.init.HeUniform())
)
network = DenseLayer(incoming=network,
num_units=n_actions,
W=GlorotNormal(),
b=lasagne.init.Constant(0),
nonlinearity=linear)
network = lasagne.layers.ReshapeLayer(network, (-1, n_actions))
return network
def init_model(self, n_actions, observation_shape):
nn = InputLayer((None, ) + observation_shape,
input_var=self.observations)
nn1 = DenseLayer(nn, 256, W=GlorotNormal())
nn2 = DenseLayer(nn1, 64, W=GlorotNormal())
self.m = DenseLayer(nn2, n_actions, nonlinearity=linear)
self.logsigma = DenseLayer(nn2, n_actions, nonlinearity=linear)
self.model = [self.m, self.logsigma]
def test_glorot_normal_c01b_4d_only():
from lasagne.init import GlorotNormal
with pytest.raises(RuntimeError):
GlorotNormal(c01b=True).sample((100, ))
with pytest.raises(RuntimeError):
GlorotNormal(c01b=True).sample((100, 100))
with pytest.raises(RuntimeError):
GlorotNormal(c01b=True).sample((100, 100, 100))
def getNet2():
inputLayer = layers.InputLayer(shape=(None, 1, imageShape[0], imageShape[1]))
loc1Layer = layers.Conv2DLayer(inputLayer, num_filters=32, filter_size=(3,3), W=GlorotUniform('relu'), nonlinearity=rectify)
loc2Layer = layers.MaxPool2DLayer(loc1Layer, pool_size=(2,2))
loc3Layer = layers.Conv2DLayer(loc2Layer, num_filters=64, filter_size=(4,3), W=GlorotUniform('relu'), nonlinearity=rectify)
loc4Layer = layers.MaxPool2DLayer(loc3Layer, pool_size=(2,2))
loc5Layer = layers.Conv2DLayer(loc4Layer, num_filters=128, filter_size=(3,3), W=GlorotUniform('relu'), nonlinearity=rectify)
loc6Layer = layers.MaxPool2DLayer(loc5Layer, pool_size=(2,2))
loc7Layer = layers.Conv2DLayer(loc6Layer, num_filters=256, filter_size=(3,2), W=GlorotUniform('relu'), nonlinearity=rectify)
#loc7Layer = layers.DenseLayer(loc5Layer, num_units=1024, nonlinearity=rectify)
loc8Layer = layers.DenseLayer(loc7Layer, num_units=256, W=GlorotUniform('relu'), nonlinearity=rectify)
loc9Layer = layers.DenseLayer(loc8Layer, num_units=128, W=GlorotUniform('relu'), nonlinearity=rectify)
loc10Layer = layers.DenseLayer(loc9Layer, num_units=64, W=GlorotUniform('relu'), nonlinearity=rectify)
#loc11Layer = layers.DenseLayer(loc10Layer, num_units=32, nonlinearity=tanh)
#loc12Layer = layers.DenseLayer(loc11Layer, num_units=16, nonlinearity=tanh)
locOutLayer = layers.DenseLayer(loc10Layer, num_units=6, W=GlorotUniform(1.0), nonlinearity=identity)
transformLayer = layers.TransformerLayer(inputLayer, locOutLayer, downsample_factor=1.0)
conv1Layer = layers.Conv2DLayer(transformLayer, num_filters=32, filter_size=(3,3), W=GlorotNormal('relu'), nonlinearity=rectify)
pool1Layer = layers.MaxPool2DLayer(conv1Layer, pool_size=(2,2))
conv2Layer = layers.Conv2DLayer(pool1Layer, num_filters=64, filter_size=(4,3), W=GlorotUniform('relu'), nonlinearity=rectify)
pool2Layer = layers.MaxPool2DLayer(conv2Layer, pool_size=(2,2))
conv3Layer = layers.Conv2DLayer(pool2Layer, num_filters=128, filter_size=(3,3), W=GlorotUniform('relu'), nonlinearity=rectify)
pool3Layer = layers.MaxPool2DLayer(conv3Layer, pool_size=(2,2))
conv4Layer = layers.Conv2DLayer(pool3Layer, num_filters=256, filter_size=(3,2), W=GlorotNormal('relu'), nonlinearity=rectify)
hidden1Layer = layers.DenseLayer(conv4Layer, num_units=1024, W=GlorotUniform('relu'), nonlinearity=rectify)
dropout1Layer = layers.DropoutLayer(hidden1Layer, p=0.5)
hidden2Layer = layers.DenseLayer(dropout1Layer, num_units=512, W=GlorotUniform('relu'), nonlinearity=rectify)
#hidden3Layer = layers.DenseLayer(hidden2Layer, num_units=256, nonlinearity=tanh)
outputLayer = layers.DenseLayer(hidden2Layer, num_units=10, W=GlorotUniform(1.0), nonlinearity=softmax)
return outputLayer
def __init__(self, gain_ini, n_hidden, n_chars, n_mixt_attention,
n_mixtures):
"""
Parameters
----------
n_mixt_attention: int
Number of mixtures used by the attention mechanism
n_chars: int
Number of different characters
n_mixtures: int
Number of mixtures in the Gaussian Mixture model
"""
self.n_hidden = n_hidden
self.n_chars = n_chars
self.n_mixt_attention = n_mixt_attention
self.n_mixtures = n_mixtures
ini = GlorotNormal(gain_ini)
self.pos_layer = PositionAttentionLayer(
GRULayer([3, self.n_chars], n_hidden, ini), self.n_chars,
self.n_mixt_attention, ini)
self.mixture = MixtureGaussians2D([n_hidden, self.n_chars], n_mixtures,
ini)
self.params = self.pos_layer.params + self.mixture.params
def __init__(self, gain_ini, n_hidden, n_mixtures):
ini = GlorotNormal(gain_ini)
self.gru_layer = GRULayer(3, n_hidden, ini)
self.mixture = MixtureGaussians2D(n_hidden, n_mixtures, ini)
self.params = self.gru_layer.params + self.mixture.params
def test_glorot_normal_gain():
from lasagne.init import GlorotNormal
sample = GlorotNormal(gain=10.0).sample((100, 100))
assert -0.1 < sample.mean() < 0.1
assert 0.9 < sample.std() < 1.1
sample = GlorotNormal(gain='relu').sample((100, 100))
assert -0.01 < sample.mean() < 0.01
assert 0.132 < sample.std() < 0.152
def convert_initialization(component, nonlinearity="sigmoid"):
# component = init_dic[component_key]
assert(len(component) == 2)
if component[0] == "uniform":
return Uniform(component[1])
elif component[0] == "glorotnormal":
if nonlinearity in ["linear", "sigmoid", "tanh"]:
return GlorotNormal(1.)
else:
return GlorotNormal("relu")
elif component[0] == "glorotuniform":
if nonlinearity in ["linear", "sigmoid", "tanh"]:
return GlorotUniform(1.)
else:
return GlorotUniform("relu")
elif component[0] == "normal":
return Normal(*component[1])
else:
raise NotImplementedError()
def getNet1():
inputLayer = layers.InputLayer(shape=(None, 1, imageShape[0],
imageShape[1]))
conv1Layer = layers.Conv2DLayer(inputLayer,
num_filters=32,
filter_size=(3, 3),
W=GlorotNormal(0.8),
nonlinearity=rectify)
pool1Layer = layers.MaxPool2DLayer(conv1Layer, pool_size=(2, 2))
dropout1Layer = layers.DropoutLayer(pool1Layer, p=0.5)
conv2Layer = layers.Conv2DLayer(dropout1Layer,
num_filters=64,
filter_size=(4, 3),
W=GlorotUniform(1.0),
nonlinearity=rectify)
pool2Layer = layers.MaxPool2DLayer(conv2Layer, pool_size=(2, 2))
dropout2Layer = layers.DropoutLayer(pool2Layer, p=0.5)
conv3Layer = layers.Conv2DLayer(dropout2Layer,
num_filters=128,
filter_size=(3, 3),
W=GlorotUniform(1.0),
nonlinearity=rectify)
pool3Layer = layers.MaxPool2DLayer(conv3Layer, pool_size=(2, 2))
dropout3Layer = layers.DropoutLayer(pool3Layer, p=0.5)
conv4Layer = layers.Conv2DLayer(dropout3Layer,
num_filters=256,
filter_size=(3, 2),
W=GlorotNormal(0.8),
nonlinearity=rectify)
hidden1Layer = layers.DenseLayer(conv4Layer,
num_units=1024,
W=GlorotUniform(1.0),
nonlinearity=rectify)
hidden2Layer = layers.DenseLayer(hidden1Layer,
num_units=512,
W=GlorotUniform(1.0),
nonlinearity=rectify)
#hidden3Layer = layers.DenseLayer(hidden2Layer, num_units=256, nonlinearity=tanh)
outputLayer = layers.DenseLayer(hidden2Layer,
num_units=10,
nonlinearity=softmax)
return outputLayer
def test_glorot_normal_gain():
from lasagne.init import GlorotNormal
sample = GlorotNormal(gain=10.0).sample((100, 100))
assert -0.1 < sample.mean() < 0.1
assert 0.9 < sample.std() < 1.1
sample = GlorotNormal(gain='relu').sample((100, 100))
assert -0.01 < sample.mean() < 0.01
assert 0.132 < sample.std() < 0.152
def getNet8():
inputLayer = layers.InputLayer(shape=(None, 1, imageShape[0], imageShape[1]))
conv1Layer = layers.Conv2DLayer(inputLayer, num_filters=32, filter_size=(3,3), pad=(1,1), W=HeNormal('relu'), nonlinearity=rectify)
conv2Layer = layers.Conv2DLayer(conv1Layer, num_filters=32, filter_size=(3,3), pad=(1,1), W=HeNormal('relu'), nonlinearity=rectify)
conv3Layer = layers.Conv2DLayer(conv2Layer, num_filters=32, filter_size=(3,3), W=GlorotNormal('relu'), nonlinearity=rectify)
pool1Layer = layers.MaxPool2DLayer(conv3Layer, pool_size=(2,2))
conv4Layer = layers.Conv2DLayer(pool1Layer, num_filters=64, filter_size=(3,3), pad=(1,1), W=HeNormal('relu'), nonlinearity=rectify)
conv5Layer = layers.Conv2DLayer(conv4Layer, num_filters=64, filter_size=(3,3), pad=(1,1), W=HeNormal('relu'), nonlinearity=rectify)
conv6Layer = layers.Conv2DLayer(conv5Layer, num_filters=64, filter_size=(4,3), W=GlorotNormal('relu'), nonlinearity=rectify)
pool2Layer = layers.MaxPool2DLayer(conv6Layer, pool_size=(2,2))
conv7Layer = layers.Conv2DLayer(pool2Layer, num_filters=128, filter_size=(3,3), pad=(1,1), W=HeNormal('relu'), nonlinearity=rectify)
conv8Layer = layers.Conv2DLayer(conv7Layer, num_filters=128, filter_size=(3,3), pad=(1,1), W=HeNormal('relu'), nonlinearity=rectify)
conv9Layer = layers.Conv2DLayer(conv8Layer, num_filters=128, filter_size=(3,3), W=GlorotNormal('relu'), nonlinearity=rectify)
pool3Layer = layers.MaxPool2DLayer(conv9Layer, pool_size=(2,2))
#conv4Layer = layers.Conv2DLayer(pool3Layer, num_filters=256, filter_size=(3,2), W=GlorotNormal('relu'), nonlinearity=elu)
hidden1Layer = layers.DenseLayer(pool3Layer, num_units=1024, W=GlorotNormal('relu'), nonlinearity=rectify)
dropout1Layer = layers.DropoutLayer(hidden1Layer, p=0.5)
hidden2Layer = layers.DenseLayer(dropout1Layer, num_units=512, W=GlorotNormal('relu'), nonlinearity=rectify)
dropout2Layer = layers.DropoutLayer(hidden2Layer, p=0.5)
hidden3Layer = layers.DenseLayer(dropout2Layer, num_units=256, W=GlorotNormal('relu'), nonlinearity=rectify)
outputLayer = layers.DenseLayer(hidden3Layer, num_units=10, W=GlorotNormal(1.0), nonlinearity=softmax)
return outputLayer
('dropout1', DropoutLayer),
# ('dense2', DenseLayer),
# ('dropout2', DropoutLayer),
('output', DenseLayer)
]
#0.686160
# inDrop=0.2, den0=1000, den0drop=.6, den1=1000, den1drop=0.6
np.random.seed(15)
net0 = NeuralNet(
layers=layers0,
input_shape=(None, num_features),
inputDropout0_p=0.35,
dense0_num_units=128,
dense0_W=GlorotNormal(),
dense0_b=Constant(1.0),
dropout0_p=0.5,
dense0_nonlinearity=rectify,
# noise0_sigma=2,
dense1_num_units=128,
dense1_W=GlorotNormal(),
dense1_b=Constant(1.0),
dense1_nonlinearity=rectify,
dropout1_p=0.5,
# dense2_num_units=30,
# dense2_W=GlorotUniform(),
# dense2_b = Constant(1.0),
# dense2_nonlinearity=rectify,
# dropout2_p=0.3,
output_num_units=num_classes,
def build(inputHeight, inputWidth, input_var, do_dropout=False):
#net = OrderedDict()
net = {
'input':
InputLayer((None, 3, inputHeight, inputWidth), input_var=input_var)
}
#net['input'] = InputLayer((None, 3, inputHeight, inputWidth), input_var=input_var)
print "Input: {}".format(net['input'].output_shape[1:])
net['bgr'] = RGBtoBGRLayer(net['input'])
net['contr_1_1'] = batch_norm(
ConvLayer(net['bgr'], 64, 3, pad='same', W=GlorotNormal(gain="relu")))
print "convtr1_1: {}".format(net['contr_1_1'].output_shape[1:])
net['contr_1_2'] = batch_norm(
ConvLayer(net['contr_1_1'],
64,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "convtr1_2: {}".format(net['contr_1_2'].output_shape[1:])
net['pool1'] = Pool2DLayer(net['contr_1_2'], 2)
print "pool1: {}".format(net['pool1'].output_shape[1:])
net['contr_2_1'] = batch_norm(
ConvLayer(net['pool1'],
128,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "convtr2_1: {}".format(net['contr_2_1'].output_shape[1:])
net['contr_2_2'] = batch_norm(
ConvLayer(net['contr_2_1'],
128,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "convtr2_2: {}".format(net['contr_2_2'].output_shape[1:])
net['pool2'] = Pool2DLayer(net['contr_2_2'], 2)
print "pool2: {}".format(net['pool2'].output_shape[1:])
net['contr_3_1'] = batch_norm(
ConvLayer(net['pool2'],
256,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "convtr3_1: {}".format(net['contr_3_1'].output_shape[1:])
net['contr_3_2'] = batch_norm(
ConvLayer(net['contr_3_1'],
256,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "convtr3_2: {}".format(net['contr_3_2'].output_shape[1:])
net['pool3'] = Pool2DLayer(net['contr_3_2'], 2)
print "pool3: {}".format(net['pool3'].output_shape[1:])
net['contr_4_1'] = batch_norm(
ConvLayer(net['pool3'],
512,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "convtr4_1: {}".format(net['contr_4_1'].output_shape[1:])
net['contr_4_2'] = batch_norm(
ConvLayer(net['contr_4_1'],
512,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "convtr4_2: {}".format(net['contr_4_2'].output_shape[1:])
l = net['pool4'] = Pool2DLayer(net['contr_4_2'], 2)
print "pool4: {}".format(net['pool4'].output_shape[1:])
# the paper does not really describe where and how dropout is added. Feel free to try more options
if do_dropout:
l = DropoutLayer(l, p=0.4)
net['encode_1'] = batch_norm(
ConvLayer(l, 1024, 3, pad='same', W=GlorotNormal(gain="relu")))
print "encode_1: {}".format(net['encode_1'].output_shape[1:])
net['encode_2'] = batch_norm(
ConvLayer(net['encode_1'],
1024,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "encode_2: {}".format(net['encode_2'].output_shape[1:])
net['upscale1'] = batch_norm(
Deconv2DLayer(net['encode_2'],
1024,
2,
2,
crop="valid",
W=GlorotNormal(gain="relu")))
print "upscale1: {}".format(net['upscale1'].output_shape[1:])
net['concat1'] = ConcatLayer([net['upscale1'], net['contr_4_2']],
cropping=(None, None, "center", "center"))
print "concat1: {}".format(net['concat1'].output_shape[1:])
net['expand_1_1'] = batch_norm(
ConvLayer(net['concat1'],
512,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "expand_1_1: {}".format(net['expand_1_1'].output_shape[1:])
net['expand_1_2'] = batch_norm(
ConvLayer(net['expand_1_1'],
512,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "expand_1_2: {}".format(net['expand_1_2'].output_shape[1:])
net['upscale2'] = batch_norm(
Deconv2DLayer(net['expand_1_2'],
512,
2,
2,
crop="valid",
W=GlorotNormal(gain="relu")))
print "upscale2: {}".format(net['upscale2'].output_shape[1:])
net['concat2'] = ConcatLayer([net['upscale2'], net['contr_3_2']],
cropping=(None, None, "center", "center"))
print "concat2: {}".format(net['concat2'].output_shape[1:])
net['expand_2_1'] = batch_norm(
ConvLayer(net['concat2'],
256,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "expand_2_1: {}".format(net['expand_2_1'].output_shape[1:])
net['expand_2_2'] = batch_norm(
ConvLayer(net['expand_2_1'],
256,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "expand_2_2: {}".format(net['expand_2_2'].output_shape[1:])
net['upscale3'] = batch_norm(
Deconv2DLayer(net['expand_2_2'],
256,
2,
2,
crop="valid",
W=GlorotNormal(gain="relu")))
print "upscale3: {}".format(net['upscale3'].output_shape[1:])
net['concat3'] = ConcatLayer([net['upscale3'], net['contr_2_2']],
cropping=(None, None, "center", "center"))
print "concat3: {}".format(net['concat3'].output_shape[1:])
net['expand_3_1'] = batch_norm(
ConvLayer(net['concat3'],
128,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "expand_3_1: {}".format(net['expand_3_1'].output_shape[1:])
net['expand_3_2'] = batch_norm(
ConvLayer(net['expand_3_1'],
128,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "expand_3_2: {}".format(net['expand_3_2'].output_shape[1:])
net['upscale4'] = batch_norm(
Deconv2DLayer(net['expand_3_2'],
128,
2,
2,
crop="valid",
W=GlorotNormal(gain="relu")))
print "upscale4: {}".format(net['upscale4'].output_shape[1:])
net['concat4'] = ConcatLayer([net['upscale4'], net['contr_1_2']],
cropping=(None, None, "center", "center"))
print "concat4: {}".format(net['concat4'].output_shape[1:])
net['expand_4_1'] = batch_norm(
ConvLayer(net['concat4'],
64,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "expand_4_1: {}".format(net['expand_4_1'].output_shape[1:])
net['expand_4_2'] = batch_norm(
ConvLayer(net['expand_4_1'],
64,
3,
pad='same',
W=GlorotNormal(gain="relu")))
print "expand_4_2: {}".format(net['expand_4_2'].output_shape[1:])
net['output'] = ConvLayer(net['expand_4_2'], 1, 1, nonlinearity=sigmoid)
print "output: {}".format(net['output'].output_shape[1:])
# net['dimshuffle'] = DimshuffleLayer(net['output_segmentation'], (1, 0, 2, 3))
# print "dimshuffle: {}".format(net['dimshuffle'].output_shape[1:])
# net['reshapeSeg'] = ReshapeLayer(net['dimshuffle'], (2, -1))
# print "reshapeSeg: {}".format(net['reshapeSeg'].output_shape[1:])
# net['dimshuffle2'] = DimshuffleLayer(net['reshapeSeg'], (1, 0))
# print "dimshuffle2: {}".format(net['dimshuffle2'].output_shape[1:])
# net['output_flattened'] = NonlinearityLayer(net['dimshuffle2'], nonlinearity=lasagne.nonlinearities.softmax)
# print "output_flattened: {}".format(net['output_flattened'].output_shape[1:])
return net
def build_UNet(n_input_channels=3,
BATCH_SIZE=None,
num_output_classes=2,
pad='same',
nonlinearity=elu,
input_dim=(128, 128),
base_n_filters=64,
do_dropout=False,
weights=None):
net = OrderedDict()
net['input'] = InputLayer(
(BATCH_SIZE, n_input_channels, input_dim[0], input_dim[1]))
net['contr_1_1'] = batch_norm(
ConvLayer(
net['input'],
num_filters=base_n_filters,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal(),
))
net['contr_1_2'] = batch_norm(
ConvLayer(net['contr_1_1'],
num_filters=base_n_filters,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['pool1'] = Pool2DLayer(net['contr_1_2'], pool_size=2)
net['contr_2_1'] = batch_norm(
ConvLayer(net['pool1'],
num_filters=base_n_filters * 2,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['contr_2_2'] = batch_norm(
ConvLayer(net['contr_2_1'],
num_filters=base_n_filters * 2,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['pool2'] = Pool2DLayer(net['contr_2_2'], pool_size=2)
net['contr_3_1'] = batch_norm(
ConvLayer(net['pool2'],
num_filters=base_n_filters * 4,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['contr_3_2'] = batch_norm(
ConvLayer(net['contr_3_1'],
num_filters=base_n_filters * 4,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['pool3'] = Pool2DLayer(net['contr_3_2'], pool_size=2)
net['contr_4_1'] = batch_norm(
ConvLayer(net['pool3'],
num_filters=base_n_filters * 8,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['contr_4_2'] = batch_norm(
ConvLayer(net['contr_4_1'],
num_filters=base_n_filters * 8,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
l = net['pool4'] = Pool2DLayer(net['contr_4_2'], pool_size=2)
if do_dropout:
l = DropoutLayer(l, p=0.4)
net['encode_1'] = batch_norm(
ConvLayer(l,
num_filters=base_n_filters * 16,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['encode_2'] = batch_norm(
ConvLayer(net['encode_1'],
num_filters=base_n_filters * 16,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['upscale1'] = batch_norm(
Deconv2DLayer(net['encode_2'],
num_filters=base_n_filters * 16,
filter_size=2,
stride=2,
crop="valid",
nonlinearity=nonlinearity,
W=GlorotNormal()))
net['concat1'] = ConcatLayer([net['upscale1'], net['contr_4_2']],
cropping=(None, None, "center", "center"))
net['expand_1_1'] = batch_norm(
ConvLayer(net['concat1'],
num_filters=base_n_filters * 8,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['expand_1_2'] = batch_norm(
ConvLayer(net['expand_1_1'],
num_filters=base_n_filters * 8,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['upscale2'] = batch_norm(
Deconv2DLayer(net['expand_1_2'],
num_filters=base_n_filters * 8,
filter_size=2,
stride=2,
crop="valid",
nonlinearity=nonlinearity,
W=GlorotNormal()))
net['concat2'] = ConcatLayer([net['upscale2'], net['contr_3_2']],
cropping=(None, None, "center", "center"))
net['expand_2_1'] = batch_norm(
ConvLayer(net['concat2'],
num_filters=base_n_filters * 4,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['expand_2_2'] = batch_norm(
ConvLayer(net['expand_2_1'],
num_filters=base_n_filters * 4,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['upscale3'] = batch_norm(
Deconv2DLayer(net['expand_2_2'],
num_filters=base_n_filters * 4,
filter_size=2,
stride=2,
crop="valid",
nonlinearity=nonlinearity,
W=GlorotNormal()))
net['concat3'] = ConcatLayer([net['upscale3'], net['contr_2_2']],
cropping=(None, None, "center", "center"))
net['expand_3_1'] = batch_norm(
ConvLayer(net['concat3'],
num_filters=base_n_filters * 2,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['expand_3_2'] = batch_norm(
ConvLayer(net['expand_3_1'],
num_filters=base_n_filters * 2,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['upscale4'] = batch_norm(
Deconv2DLayer(net['expand_3_2'],
num_filters=base_n_filters * 2,
filter_size=2,
stride=2,
crop="valid",
nonlinearity=nonlinearity,
W=GlorotNormal()))
net['concat4'] = ConcatLayer([net['upscale4'], net['contr_1_2']],
cropping=(None, None, "center", "center"))
net['expand_4_1'] = batch_norm(
ConvLayer(net['concat4'],
num_filters=base_n_filters,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['expand_4_2'] = batch_norm(
ConvLayer(net['expand_4_1'],
num_filters=base_n_filters,
filter_size=3,
nonlinearity=nonlinearity,
pad=pad,
W=GlorotNormal()))
net['output_segmentation'] = ConvLayer(net['expand_4_2'],
num_filters=num_output_classes,
filter_size=1,
nonlinearity=None)
net['dimshuffle'] = DimshuffleLayer(net['output_segmentation'],
(1, 0, 2, 3))
net['reshapeSeg'] = ReshapeLayer(net['dimshuffle'],
(num_output_classes, -1))
net['dimshuffle2'] = DimshuffleLayer(net['reshapeSeg'], (1, 0))
net['output_flattened'] = NonlinearityLayer(
net['dimshuffle2'], nonlinearity=lasagne.nonlinearities.softmax)
if weights is not None:
lasagne.layers.set_all_param_values(net['output_flattened'], weights)
return net
def test_glorot_normal_receptive_field():
from lasagne.init import GlorotNormal
sample = GlorotNormal().sample((50, 50, 2))
assert -0.01 < sample.mean() < 0.01
assert 0.09 < sample.std() < 0.11
def test_glorot_1d_not_supported():
from lasagne.init import GlorotNormal
with pytest.raises(RuntimeError):
GlorotNormal().sample((100, ))
def test_glorot_normal():
from lasagne.init import GlorotNormal
sample = GlorotNormal().sample((100, 100))
assert -0.01 < sample.mean() < 0.01
assert 0.09 < sample.std() < 0.11
def test_glorot_normal():
from lasagne.init import GlorotNormal
sample = GlorotNormal().sample((100, 100))
assert -0.01 < sample.mean() < 0.01
assert 0.09 < sample.std() < 0.11
seed(SEED)
print 'set random seed to {0} while loading NNet'.format(SEED)
nonlinearities = {
'tanh': tanh,
'sigmoid': sigmoid,
'rectify': rectify,
'leaky2': LeakyRectify(leakiness=0.02),
'leaky20': LeakyRectify(leakiness=0.2),
'softmax': softmax,
}
initializers = {
'orthogonal': Orthogonal(),
'sparse': Sparse(),
'glorot_normal': GlorotNormal(),
'glorot_uniform': GlorotUniform(),
'he_normal': HeNormal(),
'he_uniform': HeUniform(),
}
class NNet(BaseEstimator, ClassifierMixin):
def __init__(
self,
name='nameless_net', # used for saving, so maybe make it unique
dense1_size=60,
dense1_nonlinearity='tanh',
dense1_init='orthogonal',
dense2_size=None,
dense2_nonlinearity=None, # inherits dense1
def test_glorot_normal_c01b():
from lasagne.init import GlorotNormal
sample = GlorotNormal(c01b=True).sample((25, 2, 2, 25))
assert -0.01 < sample.mean() < 0.01
assert 0.09 < sample.std() < 0.11
def test_glorot_normal_receptive_field():
from lasagne.init import GlorotNormal
sample = GlorotNormal().sample((50, 50, 2))
assert -0.01 < sample.mean() < 0.01
assert 0.09 < sample.std() < 0.11
def test_glorot_normal_c01b():
from lasagne.init import GlorotNormal
sample = GlorotNormal(c01b=True).sample((25, 2, 2, 25))
assert -0.01 < sample.mean() < 0.01
assert 0.09 < sample.std() < 0.11
def create_dadgm_model(self, X, Y, n_dim, n_out, n_chan=1, n_class=10):
n_cat = 20 # number of categorical distributions
n_lat = n_class * n_cat # latent stochastic variables
n_aux = 10 # number of auxiliary variables
n_hid = 500 # size of hidden layer in encoder/decoder
n_in = n_out = n_dim * n_dim * n_chan
tau = self.tau
hid_nl = T.nnet.relu
relu_shift = lambda av: T.nnet.relu(av + 10) - 10
# create the encoder network
# - create q(a|x)
qa_net_in = InputLayer(shape=(None, n_in), input_var=X)
qa_net = DenseLayer(
qa_net_in,
num_units=n_hid,
W=GlorotNormal('relu'),
b=Normal(1e-3),
nonlinearity=hid_nl,
)
qa_net_mu = DenseLayer(
qa_net,
num_units=n_aux,
W=GlorotNormal(),
b=Normal(1e-3),
nonlinearity=None,
)
qa_net_logsigma = DenseLayer(
qa_net,
num_units=n_aux,
W=GlorotNormal(),
b=Normal(1e-3),
nonlinearity=relu_shift,
)
qa_net_sample = GaussianSampleLayer(qa_net_mu, qa_net_logsigma)
# - create q(z|a, x)
qz_net_in = lasagne.layers.InputLayer((None, n_aux))
qz_net_a = DenseLayer(
qz_net_in,
num_units=n_hid,
nonlinearity=hid_nl,
)
qz_net_b = DenseLayer(
qa_net_in,
num_units=n_hid,
nonlinearity=hid_nl,
)
qz_net = ElemwiseSumLayer([qz_net_a, qz_net_b])
qz_net = DenseLayer(qz_net, num_units=n_hid, nonlinearity=hid_nl)
qz_net_mu = DenseLayer(
qz_net,
num_units=n_lat,
nonlinearity=None,
)
qz_net_mu = reshape(qz_net_mu, (-1, n_class))
qz_net_sample = GumbelSoftmaxSampleLayer(qz_net_mu, tau)
qz_net_sample = reshape(qz_net_sample, (-1, n_cat, n_class))
# create the decoder network
# - create p(x|z)
px_net_in = lasagne.layers.InputLayer((None, n_cat, n_class))
# --- rest is created from RBM ---
# - create p(a|z)
pa_net = DenseLayer(
flatten(px_net_in),
num_units=n_hid,
W=GlorotNormal('relu'),
b=Normal(1e-3),
nonlinearity=hid_nl,
)
pa_net_mu = DenseLayer(
pa_net,
num_units=n_aux,
W=GlorotNormal(),
b=Normal(1e-3),
nonlinearity=None,
)
pa_net_logsigma = DenseLayer(
pa_net,
num_units=n_aux,
W=GlorotNormal(),
b=Normal(1e-3),
nonlinearity=relu_shift,
)
# save network params
self.n_cat = n_cat
self.input_layers = (qa_net_in, qz_net_in, px_net_in)
return pa_net_mu, pa_net_logsigma, qz_net_mu, \
qa_net_mu, qa_net_logsigma, qz_net_sample, qa_net_sample,