tf.keras.backend.ctc_label_dense_to_sparse 

tf.keras.backend.ctc_label_dense_to_sparse(
    labels,
    label_lengths
)

Defined in tensorflow/python/keras/backend.py.

Converts CTC labels from dense to sparse.

Arguments:

  • labels: dense CTC labels.
  • label_lengths: length of the labels.

Returns:

A sparse tensor representation of the labels.