tf.losses.sigmoid_cross_entropy
Creates a cross-entropy loss using tf.nn.sigmoid_cross_entropy_with_logits.
tf.losses.sigmoid_cross_entropy( multi_class_labels, logits, weights=1.0, label_smoothing=0, scope=None, loss_collection=tf.GraphKeys.LOSSES, reduction=Reduction.SUM_BY_NONZERO_WEIGHTS )
weights
acts as a coefficient for the loss. If a scalar is provided, then the loss is simply scaled by the given value. If weights
is a tensor of shape [batch_size]
, then the loss weights apply to each corresponding sample.
If label_smoothing
is nonzero, smooth the labels towards 1/2:
new_multiclass_labels = multiclass_labels * (1 - label_smoothing) + 0.5 * label_smoothing
Args | |
---|---|
multi_class_labels | [batch_size, num_classes] target integer labels in {0, 1} . |
logits | Float [batch_size, num_classes] logits outputs of the network. |
weights | Optional Tensor whose rank is either 0, or the same rank as labels , and must be broadcastable to labels (i.e., all dimensions must be either 1 , or the same as the corresponding losses dimension). |
label_smoothing | If greater than 0 then smooth the labels. |
scope | The scope for the operations performed in computing the loss. |
loss_collection | collection to which the loss will be added. |
reduction | Type of reduction to apply to loss. |
Returns | |
---|---|
Weighted loss Tensor of the same type as logits . If reduction is NONE , this has the same shape as logits ; otherwise, it is scalar. |
Raises | |
---|---|
ValueError | If the shape of logits doesn't match that of multi_class_labels or if the shape of weights is invalid, or if weights is None. Also if multi_class_labels or logits is None. |
Eager Compatibility
The loss_collection
argument is ignored when executing eagerly. Consider holding on to the return value or collecting losses via a tf.keras.Model
.
© 2020 The TensorFlow Authors. All rights reserved.
Licensed under the Creative Commons Attribution License 3.0.
Code samples licensed under the Apache 2.0 License.
https://www.tensorflow.org/versions/r1.15/api_docs/python/tf/losses/sigmoid_cross_entropy