def maxpoolLayer(self, size, stride=None, pad='SAME'):
if stride == None:
stride = size
self.result = L.maxpooling(self.result,
size,
stride,
'maxpool_' + str(self.layernum),
pad=pad)
self.inpsize = self.result.get_shape().as_list()
return self.result
def get_rpn_layers(c2,c3,c4,c5): P5 = L.conv2D(c5,1,256,'P5') P4 = L.upSampling(P5,2,'U5') + L.conv2D(c4,1,256,'P4') P3 = L.upSampling(P4,2,'U4') + L.conv2D(c3,1,256,'P3') P2 = L.upSampling(P3,2,'U3') + L.conv2D(c2,1,256,'P2') P2 = L.conv2D(P2,3,256,'P22') P3 = L.conv2D(P3,3,256,'P32') P4 = L.conv2D(P4,3,256,'P42') P5 = L.conv2D(P5,3,256,'P52') P6 = L.maxpooling(P5,1,2,'P6') return P2,P3,P4,P5,P6
def fcn_net(self, x, train=True):
conv1 = conv2d(x, [3, 3, 3, 32], 'conv1')
maxp1 = maxpooling(conv1)
conv2 = conv2d(maxp1, [3, 3, 32, 32], 'conv2')
maxp2 = maxpooling(conv2)
conv3 = conv2d(maxp2, [3, 3, 32, 64], 'conv3')
maxp3 = maxpooling(conv3)
conv4 = conv2d(maxp3, [3, 3, 64, 64], 'conv4')
maxp4 = maxpooling(conv4)
conv5 = conv2d(maxp4, [3, 3, 64, 128], 'conv5')
maxp5 = maxpooling(conv5)
conv6 = conv2d(maxp5, [3, 3, 128, 128], 'conv6')
maxp6 = maxpooling(conv6)
conv7 = conv2d(maxp6, [3, 3, 128, 256], 'conv7')
maxp7 = maxpooling(conv7)
conv8 = conv2d(maxp7, [3, 3, 256, 256], 'conv8')
maxp8 = maxpooling(conv8)
conv9 = conv2d(maxp8, [3, 3, 256, 512], 'conv9')
maxp9 = maxpooling(conv9)
drop = tf.nn.dropout(maxp9, self.dropout)
# 1x1 convolution + sigmoid activation
net = conv2d(drop, [1, 1, 512, self.input_size * self.input_size],
'conv10',
activation='no')
# squeeze the last two dimension in train
if train:
net = tf.squeeze(net, [1, 2], name="squeezed")
return net
def u_net(self, x, layers=4, base_channel=64, train=True):
ds_layers = {}
ds_layer_shape = {}
# down sample layers
for layer in range(0, layers-1):
f_channels = base_channel * (2**layer)
layer_name = 'ds_{}'.format(layer)
if layer == 0:
x = conv2d(x, [3, 3, 3, f_channels], layer_name + '_1')
else:
x = conv2d(x, [3, 3, f_channels/2, f_channels], layer_name + '_1')
x = conv2d(x, [3, 3, f_channels, f_channels], layer_name + '_2')
ds_layers[layer] = x
ds_layer_shape[layer] = tf.shape(x)
x = maxpooling(x)
# bottom layer
f_channels = base_channel * (2**(layers-1))
x = conv2d(x, [3, 3, f_channels/2, f_channels], 'bottom_1')
x = conv2d(x, [3, 3, f_channels, f_channels], 'bottom_2')
# up sample layers
for layer in range(layers-2, -1, -1):
f_channels = base_channel * (2**layer)
layer_name = 'up_{}'.format(layer)
x = deconv2d(x, [3, 3, f_channels, 2*f_channels], ds_layer_shape[layer], layer_name + '_deconv2d')
# add the previous down sumple layer to the up sample layer
x = concat(ds_layers[layer], x)
x = conv2d(x, [3, 3, 2*f_channels, f_channels], layer_name + '_conv_1')
x = conv2d(x, [3, 3, f_channels, f_channels], layer_name + '_conv_2')
#if train:
# x = tf.nn.dropout(x, self.dropout)
# add 1x1 convolution layer to change channel to one
x = conv2d(x, [1, 1, base_channel, 1], 'conv_1x1', activation='no')
logits = tf.squeeze(x, axis=3)
return logits
def maxpoolLayer(self, size, pad='SAME', stride=None):
if stride == None:
stride = size
self.result = L.maxpooling(self.result,
size,
stride,
'maxpool_' + str(self.layernum),
pad=pad)
if pad == 'VALID':
self.inpsize[1] -= size - stride
self.inpsize[2] -= size - stride
else:
if self.inpsize[1] % 2 == 1:
self.inpsize[1] += 1
if self.inpsize[2] % 2 == 1:
self.inpsize[2] += 1
self.inpsize[1] = self.inpsize[1] // stride
self.inpsize[2] = self.inpsize[2] // stride
return [self.result, list(self.inpsize)]
def vgg_7(x, layers=3, base_channel=32, input_channel=2):
output_channel = input_channel
for i in range(layers):
x = conv2d(x, [3, 3, input_channel, output_channel], 'conv_0_'+str(i))
input_channel = output_channel
x = conv2d(x, [3, 3, input_channel, output_channel], 'conv_1_'+str(i))
input_channel = output_channel
output_channel *= 2
x = maxpooling(x)
x = flatten(x)
x = fully_connnected(x, 256, 'fc_1')
x = fully_connnected(x, 1, 'fc_2', activation='no')
logits = tf.squeeze(x)
return logits
# Normalize the data
print("normalize data")
X_train = X_train / 255.0
print(len(X_train))
X_dev = X_dev / 255.0
test = test / 255.0
# Reshape image in 3 dimensions (height = 28px, width = 28px , canal = 1)
X_train = X_train.values.reshape(-1,28,28,1)
X_dev = X_dev.values.reshape(-1,28,28,1)
X_train.shape
test = test.values.reshape(-1,28,28,1)
# initialize weights
conv_ = conv(8)
pool = maxpooling(2)
fully_c=fully_connected(13*13*8,10)
# Train!
loss = 0
n_epochs=2
losses=[]
accs=[]
num_correct = 0
print('start training')
for i, (im, label) in enumerate(zip(X_train, Y_train)):
# print(im.shape)
# print(label)
if i % 100 == 99:
print('[Step %d] Past 100 steps: Average Loss %.3f | Accuracy: %d%%' %(i + 1, loss / 100, num_correct))
losses.append(loss / 100)
accs.append(num_correct)