dae_no_walkback.py 文件源码

def salt_and_pepper(X, rate=0.3):
  a = binomial_draw(shape=tf.shape(X), p=1-rate, dtype='float32')
  b = binomial_draw(shape=tf.shape(X), p=0.5, dtype='float32')
  z = tf.zeros(tf.shape(X), dtype='float32')
  c = tf.select(tf.equal(a, z), b, z)
  return tf.add(tf.mul(X, a), c)

# Xavier Initializers