我正在做一个通过Tensorflow增强(4层DNN到5层DNN)的例子。我正在保存会话并在TF中恢复,因为TF tute中有一个简短的段落: '例如,您可能已经训练了一个4层的神经网络,现在您想要训练5层的新模型,将来自先前训练模型的4层的参数恢复到新模型的前4层。',其中张量流通启动于https://www.tensorflow.org/how_tos/variables/。恢复Tensorflow中新模型子集的变量?
但是,我发现当检查点保存4层参数时,没有人询问如何使用“恢复”,但我们需要将它放入5层,引发红旗。
使这在实际的代码,我做了
with tf.name_scope('fcl1'):
hidden_1 = fully_connected_layer(inputs, train_data.inputs.shape[1], num_hidden)
with tf.name_scope('fcl2'):
hidden_2 = fully_connected_layer(hidden_1, num_hidden, num_hidden)
with tf.name_scope('fclf'):
hidden_final = fully_connected_layer(hidden_2, num_hidden, num_hidden)
with tf.name_scope('outputl'):
outputs = fully_connected_layer(hidden_final, num_hidden, train_data.num_classes, tf.identity)
outputs = tf.nn.softmax(outputs)
with tf.name_scope('boosting'):
boosts = fully_connected_layer(outputs, train_data.num_classes, train_data.num_classes, tf.identity)
其中内部变量(或称为)“FCL1” - 这样我有“FCL1 /变量”和“FCL1/Variable_1”的重量和偏见 - 'fcl2','fclf'和'outputl'由saver.save()存储在脚本中,没有'boosting'图层。然而,正如我们现在已经“助推”层,saver.restore(SESS,“saved_models/model_list.ckpt”)不工作作为
NotFoundError: Key boosting/Variable_1 not found in checkpoint
我真的很希望听到这个问题。谢谢。下面的代码是我陷入困境的代码的主要部分。
def fully_connected_layer(inputs, input_dim, output_dim, nonlinearity=tf.nn.relu):
weights = tf.Variable(
tf.truncated_normal(
[input_dim, output_dim], stddev=2./(input_dim + output_dim)**0.5),
'weights')
biases = tf.Variable(tf.zeros([output_dim]), 'biases')
outputs = nonlinearity(tf.matmul(inputs, weights) + biases)
return outputs
inputs = tf.placeholder(tf.float32, [None, train_data.inputs.shape[1]], 'inputs')
targets = tf.placeholder(tf.float32, [None, train_data.num_classes], 'targets')
with tf.name_scope('fcl1'):
hidden_1 = fully_connected_layer(inputs, train_data.inputs.shape[1], num_hidden)
with tf.name_scope('fcl2'):
hidden_2 = fully_connected_layer(hidden_1, num_hidden, num_hidden)
with tf.name_scope('fclf'):
hidden_final = fully_connected_layer(hidden_2, num_hidden, num_hidden)
with tf.name_scope('outputl'):
outputs = fully_connected_layer(hidden_final, num_hidden, train_data.num_classes, tf.identity)
with tf.name_scope('error'):
error = tf.reduce_mean(tf.nn.softmax_cross_entropy_with_logits(outputs, targets))
with tf.name_scope('accuracy'):
accuracy = tf.reduce_mean(tf.cast(
tf.equal(tf.argmax(outputs, 1), tf.argmax(targets, 1)),
tf.float32))
with tf.name_scope('train'):
train_step = tf.train.AdamOptimizer().minimize(error)
init = tf.global_variables_initializer()
saver = tf.train.Saver()
with tf.Session() as sess:
sess.run(init)
saver.restore(sess, "saved_models/model.ckpt")
print("Model restored")
print("Optimization Starts!")
for e in range(training_epochs):
...
#Save model - save session
save_path = saver.save(sess, "saved_models/model.ckpt")
### I once saved the variables using var_list, but didn't work as well...
print("Model saved in file: %s" % save_path)
为了清楚起见,检查点文件具有
fcl1/Variable:0
fcl1/Variable_1:0
fcl2/Variable:0
fcl2/Variable_1:0
fclf/Variable:0
fclf/Variable_1:0
outputl/Variable:0
outputl/Variable_1:0
由于原来的4层模型不具有 '升压' 层。
可以恢复使用'tf.Saver' [构造]的'var_list'参数(https://www.tensorflow.org/api_docs/python模型/ state_ops/saving_and_restoring_variables)。 之后您将负责正确初始化第5层。 – drpng