tf.keras.backend.ctc_batch_cost

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Runs CTC loss algorithm on each batch element.

tf.keras.backend.ctc_batch_cost(
    y_true, y_pred, input_length, label_length
)

Arguments:

• y_true: tensor (samples, max_string_length) containing the truth labels.
• y_pred: tensor (samples, time_steps, num_categories) containing the prediction, or output of the softmax.
• input_length: tensor (samples, 1) containing the sequence length for each batch item in y_pred.
• label_length: tensor (samples, 1) containing the sequence length for each batch item in y_true.

Returns:

Tensor with shape (samples,1) containing the CTC loss of each element.