tf.nn.ctc_unique_labels(
labels,
name=None
)
Defined in tensorflow/python/ops/ctc_ops.py
.
Get unique labels and indices for batched labels for tf.nn.ctc_loss.
For use with tf.nn.ctc_loss_v2 optional argument unique
: This op can be
used to preprocess labels in input pipeline to for better speed/memory use
computing the ctc loss on TPU.
Example: ctc_unique_labels([[3, 4, 4, 3]]) -> unique labels padded with 0: [[3, 4, 0, 0]] indices of original labels in unique: [0, 1, 1, 0]
Args:
labels
: tensor of shape [batch_size, max_label_length] padded with 0.name
: A name for thisOp
. Defaults to "ctc_unique_labels".
Returns:
tuple of
- unique labels, tensor of shape [batch_size, max_label_length]
- indices into unique labels, shape [batch_size, max_label_length]