假設我已經訓練了MNIST任務模型,給出了下面的代碼:我可以在經過預訓練的Tensorflow模型中生成輸入嗎?
from tensorflow.examples.tutorials.mnist import input_data
mnist = input_data.read_data_sets("/tmp/data/", one_hot=True)
import tensorflow as tf
# Parameters
learning_rate = 0.001
training_epochs = 15
batch_size = 100
display_step = 1
# Network Parameters
n_hidden_1 = 256 # 1st layer number of features
n_hidden_2 = 256 # 2nd layer number of features
n_input = 784 # MNIST data input (img shape: 28*28)
n_classes = 10 # MNIST total classes (0-9 digits)
# tf Graph input
x = tf.placeholder("float", [None, n_input])
y = tf.placeholder("float", [None, n_classes])
weights = {
'h1': tf.Variable(tf.random_normal([n_input, n_hidden_1])),
'h2': tf.Variable(tf.random_normal([n_hidden_1, n_hidden_2])),
'out': tf.Variable(tf.random_normal([n_hidden_2, n_classes]))
}
biases = {
'b1': tf.Variable(tf.random_normal([n_hidden_1])),
'b2': tf.Variable(tf.random_normal([n_hidden_2])),
'out': tf.Variable(tf.random_normal([n_classes]))
}
# Create model
def multilayer_perceptron(x, weights, biases):
# Hidden layer with RELU activation
layer_1 = tf.add(tf.matmul(x, weights['h1']), biases['b1'])
layer_1 = tf.nn.relu(layer_1)
# Hidden layer with RELU activation
layer_2 = tf.add(tf.matmul(layer_1, weights['h2']), biases['b2'])
layer_2 = tf.nn.relu(layer_2)
# Output layer with linear activation
out_layer = tf.matmul(layer_2, weights['out']) + biases['out']
return out_layer
# Construct model
pred = multilayer_perceptron(x, weights, biases)
# Test model
correct_prediction = tf.equal(tf.argmax(pred, 1), tf.argmax(y, 1))
# Calculate accuracy
accuracy = tf.reduce_mean(tf.cast(correct_prediction, "float"))
# Define loss and optimizer
cost = tf.reduce_mean(tf.nn.softmax_cross_entropy_with_logits(logits=pred, labels=y))
optimizer = tf.train.AdamOptimizer(learning_rate=learning_rate).minimize(cost)
# Initializing the variables
init = tf.global_variables_initializer()
# Launch the graph
with tf.Session() as sess:
sess.run(init)
# Training cycle
for epoch in range(training_epochs):
avg_cost = 0.
avg_acc = 0.
total_batch = int(mnist.train.num_examples/batch_size)
# Loop over all batches
for i in range(total_batch):
batch_x, batch_y = mnist.train.next_batch(batch_size)
# Run optimization op (backprop) and cost op (to get loss value)
_, c = sess.run([optimizer, cost], feed_dict={x: batch_x, y: batch_y})
batch_acc = accuracy.eval({x: batch_x, y: batch_y})
# Compute average loss
avg_cost += c/total_batch
avg_acc += batch_acc/total_batch
# Display logs per epoch step
if epoch % display_step == 0:
test_acc = accuracy.eval({x: mnist.test.images, y: mnist.test.labels})
print(
"Epoch:",
'%04d' % (epoch+1),
"cost=",
"{:.9f}".format(avg_cost),
"average_train_accuracy=",
"{:.6f}".format(avg_acc),
"test_accuracy=",
"{:.6f}".format(test_acc)
)
print("Optimization Finished!")
所以這個模型預測給出的圖像的圖像中顯示的數字。 一旦我訓練了它,我可以使輸入變爲'變量'而不是'佔位符'並嘗試對給定輸出的輸入進行反向工程? 例如,我想提供輸出'8'併產生一個數字8的代表性圖像。
我認爲:
- 凍結模型
- 添加相同大小的可變矩陣「M」作爲輸入和權重之間的輸入
- 訂閱相同的矩陣作爲輸入來輸入佔位符
- 運行優化器學習'M'矩陣。
有沒有更好的方法?