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tf.contrib.layers.dense_to_sparse

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Converts a dense tensor into a sparse tensor.

tf.contrib.layers.dense_to_sparse(
    tensor,
    eos_token=0,
    outputs_collections=None,
    scope=None
)

An example use would be to convert dense labels to sparse ones so that they can be fed to the ctc_loss.

Args:

  • tensor: An int Tensor to be converted to a Sparse.
  • eos_token: An integer. It is part of the target label that signifies the end of a sentence.
  • outputs_collections: Collection to add the outputs.
  • scope: Optional scope for name_scope.