精准度这个指标怎么获取？

[qujinqiang]

接入crf层后，首先不太清楚 log_likelihood输出究竟是什么，那么怎么获取精准度这个指标呢？@Slyne
if self.config.crf:
log_likelihood, self.transition_params = tf.contrib.crf.crf_log_likelihood(
self.logits, self.labels, self.sequence_lengths)
self.loss = tf.reduce_mean(-log_likelihood)

[Slyne]

参照这个函数的文档吧
https://www.tensorflow.org/api_docs/python/tf/contrib/crf/crf_log_likelihood
Returns:
log_likelihood: A scalar containing the log-likelihood of the given sequence of tag indices.
transition_params: A [num_tags, num_tags] transition matrix. This is either provided by the caller or created in this function.