将张量从较小的形状平铺到较大的形状

Question

我有一个张量为（1,4,4,1）的张量，我想重复此过程并将其形状增加为（1,28,28,1）。我想在每个维度上重复一遍。

Answer 1

您可以使用tf.tile。这是一个带有较小张量的示例：

a = tf.constant([[[[1],[2]],[[3],[4]]]])
print(a.shape) # (1, 2, 2, 1)
b = tf.tile(a, [1,3,3,1])
print(b.shape) # (1, 6, 6, 1)

with tf.Session() as sess:
    print(sess.run(b))
        # [[[[1] [2] [1] [2] [1] [2]]
        #   [[3] [4] [3] [4] [3] [4]]
        #   [[1] [2] [1] [2] [1] [2]]
        #   [[3] [4] [3] [4] [3] [4]]
        #   [[1] [2] [1] [2] [1] [2]]
        #   [[3] [4] [3] [4] [3] [4]]]]