Computes the normalization for a CRF.
crf_log_norm(inputs, sequence_lengths, transition_params)
| inputs | A [batch_size, max_seq_len, num_tags] tensor of unary potentials to use as input to the CRF layer. |
|---|---|
| sequence_lengths | A [batch_size] vector of true sequence lengths. |
| transition_params | A [num_tags, num_tags] transition matrix. |
log_norm: A [batch_size] vector of normalizers for a CRF.