lenet5-forward
作者:互联网
#coding:utf-8 import tensorflow as tf IMAGE_SIZE = 28 NUM_CHANNELS = 1 CONV1_SIZE = 5 CONV1_KERNEL_NUM = 32 CONV2_SIZE = 5 CONV2_KERNEL_NUM = 64 FC_SIZE = 512 OUTPUT_NODE = 10 def get_weight(shape, regularizer): w = tf.Variable(tf.truncated_normal(shape,stddev=0.1)) if regularizer != None: tf.add_to_collection('losses', tf.contrib.layers.l2_regularizer(regularizer)(w)) return w def get_bias(shape): b = tf.Variable(tf.zeros(shape)) return b def conv2d(x,w): return tf.nn.conv2d(x, w, strides=[1, 1, 1, 1], padding='SAME') def max_pool_2x2(x): return tf.nn.max_pool(x, ksize=[1, 2, 2, 1], strides=[1, 2, 2, 1], padding='SAME') def forward(x, train, regularizer): conv1_w = get_weight([CONV1_SIZE, CONV1_SIZE, NUM_CHANNELS, CONV1_KERNEL_NUM], regularizer) conv1_b = get_bias([CONV1_KERNEL_NUM]) conv1 = conv2d(x, conv1_w) relu1 = tf.nn.relu(tf.nn.bias_add(conv1, conv1_b)) pool1 = max_pool_2x2(relu1) conv2_w = get_weight([CONV2_SIZE, CONV2_SIZE, CONV1_KERNEL_NUM, CONV2_KERNEL_NUM],regularizer) conv2_b = get_bias([CONV2_KERNEL_NUM]) conv2 = conv2d(pool1, conv2_w) relu2 = tf.nn.relu(tf.nn.bias_add(conv2, conv2_b)) pool2 = max_pool_2x2(relu2) pool_shape = pool2.get_shape().as_list() nodes = pool_shape[1] * pool_shape[2] * pool_shape[3] reshaped = tf.reshape(pool2, [pool_shape[0], nodes]) fc1_w = get_weight([nodes, FC_SIZE], regularizer) fc1_b = get_bias([FC_SIZE]) fc1 = tf.nn.relu(tf.matmul(reshaped, fc1_w) + fc1_b) if train: fc1 = tf.nn.dropout(fc1, 0.5) fc2_w = get_weight([FC_SIZE, OUTPUT_NODE], regularizer) fc2_b = get_bias([OUTPUT_NODE]) y = tf.matmul(fc1, fc2_w) + fc2_b return y
标签:lenet5,get,regularizer,tf,shape,NUM,forward,SIZE 来源: https://www.cnblogs.com/sqm724/p/13549900.html