MXNET CNN+;LSTM保存/序列化为json
我发现如何正确定义mxnet,以便将该模型序列化/转换为json文件是一个艰难的过程 管道由CNN+biLSTM+CTC组成 我现在必须使用HybridBlock和hybridize(),但我似乎无法让它工作,或者它是否可行,或者是否有其他方法 我确信我对这方面的知识缺乏,我想知道是否有人能帮上忙 以下是python中的网络定义:MXNET CNN+;LSTM保存/序列化为json,json,serialization,lstm,mxnet,Json,Serialization,Lstm,Mxnet,我发现如何正确定义mxnet,以便将该模型序列化/转换为json文件是一个艰难的过程 管道由CNN+biLSTM+CTC组成 我现在必须使用HybridBlock和hybridize(),但我似乎无法让它工作,或者它是否可行,或者是否有其他方法 我确信我对这方面的知识缺乏,我想知道是否有人能帮上忙 以下是python中的网络定义: NUM_HIDDEN = 200 NUM_CLASSES = 13550 NUM_LSTM_LAYER = 1 p_dropout = 0.5 SEQ_LEN = 3
NUM_HIDDEN = 200
NUM_CLASSES = 13550
NUM_LSTM_LAYER = 1
p_dropout = 0.5
SEQ_LEN = 32
def get_featurizer():
featurizer = gluon.nn.HybridSequential()
# conv layer
featurizer.add(gluon.nn.Conv2D(kernel_size=(3,3), padding=(1,1), channels=32, activation="relu"))
featurizer.add(gluon.nn.BatchNorm())
....
featurizer.hybridize()
return featurizer
class EncoderLayer(gluon.Block):
def __init__(self, **kwargs):
super(EncoderLayer, self).__init__(**kwargs)
with self.name_scope():
self.lstm = mx.gluon.rnn.LSTM(NUM_HIDDEN, NUM_LSTM_LAYER, bidirectional=True)
def forward(self, x):
x = x.transpose((0,3,1,2))
x = x.flatten()
x = x.split(num_outputs=SEQ_LEN, axis = 1) # (SEQ_LEN, N, CHANNELS)
x = nd.concat(*[elem.expand_dims(axis=0) for elem in x], dim=0)
x = self.lstm(x)
x = x.transpose((1, 0, 2)) # (N, SEQ_LEN, HIDDEN_UNITS)
return x
def get_encoder():
encoder = gluon.nn.Sequential()
encoder.add(EncoderLayer())
encoder.add(gluon.nn.Dropout(p_dropout))
return encoder
def get_decoder():
decoder = mx.gluon.nn.Dense(units=ALPHABET_SIZE, flatten=False)
decoder.hybridize()
return decoder
def get_net():
net = gluon.nn.Sequential()
with net.name_scope():
net.add(get_featurizer())
net.add(get_encoder())
net.add(get_decoder())
return net
任何帮助都将不胜感激。
非常感谢。对于Gluon中的模型,要导出到json,几乎没有什么要求:
import mxnet as mx
from mxnet import gluon
from mxnet import nd
BATCH_SIZE = 1
CHANNELS = 100
ALPHABET_SIZE = 1000
NUM_HIDDEN = 200
NUM_CLASSES = 13550
NUM_LSTM_LAYER = 1
p_dropout = 0.5
SEQ_LEN = 32
HEIGHT = 100
WIDTH = 100
def get_featurizer():
featurizer = gluon.nn.HybridSequential()
featurizer.add(
gluon.nn.Conv2D(kernel_size=(3, 3), padding=(1, 1), channels=32, activation="relu"))
featurizer.add(gluon.nn.BatchNorm())
return featurizer
class EncoderLayer(gluon.HybridBlock):
def __init__(self, **kwargs):
super(EncoderLayer, self).__init__(**kwargs)
with self.name_scope():
self.lstm = mx.gluon.rnn.LSTM(NUM_HIDDEN, NUM_LSTM_LAYER, bidirectional=True)
def hybrid_forward(self, F, x):
x = x.transpose((0, 3, 1, 2))
x = x.flatten()
x = x.reshape(shape=(SEQ_LEN, -1, CHANNELS)) #x.split(num_outputs=SEQ_LEN, axis=1) # (SEQ_LEN, N, CHANNELS)
x = self.lstm(x)
x = x.transpose((1, 0, 2)) # (N, SEQ_LEN, HIDDEN_UNITS)
return x
def get_encoder():
encoder = gluon.nn.HybridSequential()
encoder.add(EncoderLayer())
encoder.add(gluon.nn.Dropout(p_dropout))
return encoder
def get_decoder():
decoder = mx.gluon.nn.Dense(units=ALPHABET_SIZE, flatten=False)
return decoder
def get_net():
net = gluon.nn.HybridSequential()
with net.name_scope():
net.add(get_featurizer())
net.add(get_encoder())
net.add(get_decoder())
return net
if __name__ == '__main__':
net = get_net()
net.initialize()
net.hybridize()
fake_data = mx.random.uniform(shape=(BATCH_SIZE, HEIGHT, WIDTH, CHANNELS))
out = net(fake_data)
net.export("mymodel")
deserialized_net = gluon.nn.SymbolBlock.imports("mymodel-symbol.json", ['data'],
"mymodel-0000.params", ctx=mx.cpu())
out2 = deserialized_net(fake_data)
# just to check that we get the same results
assert (out - out2).sum().asscalar() == 0