tf.keras.regularizers.L2

A regularizer that applies a L2 regularization penalty.

Inherits From: Regularizer

Used in the notebooks

Used in the guide Used in the tutorials

The L2 regularization penalty is computed as: loss = l2 * reduce_sum(square(x))

L2 may be passed to a layer as a string identifier:

dense = tf.keras.layers.Dense(3, kernel_regularizer='l2')

In this case, the default value used is l2=0.01.

l2 Float; L2 regularization factor.

Methods

from_config

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Creates a regularizer from its config.

This method is the reverse of get_config, capable of instantiating the same regularizer from the config dictionary.

This method is used by Keras model_to_estimator, saving and loading models to HDF5 formats, Keras model cloning, some visualization utilities, and exporting models to and from JSON.

Arguments
config A Python dictionary, typically the output of get_config.

Returns
A regularizer instance.

get_config

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Returns the config of the regularizer.

An regularizer config is a Python dictionary (serializable) containing all configuration parameters of the regularizer. The same regularizer can be reinstantiated later (without any saved state) from this configuration.

This method is optional if you are just training and executing models, exporting to and from SavedModels, or using weight checkpoints.

This method is required for Keras model_to_estimator, saving and loading models to HDF5 formats, Keras model cloning, some visualization utilities, and exporting models to and from JSON.

Returns
Python dictionary.

__call__

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Compute a regularization penalty from an input tensor.