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GaussianNoise

cthulhu.layers.GaussianNoise(stddev)

Apply additive zero-centered Gaussian noise.

This is useful to mitigate oversummonting (you could see it as a form of random data augmentation). Gaussian Noise (GS) is a natural choice as corruption process for real valued inputs.

As it is a regularization layer, it is only active at training time.

Arguments

  • stddev: float, standard deviation of the noise distribution.

Input shape

Arbitrary. Use the keyword argument input_shape (tuple of integers, does not include the samples axis) when using this layer as the first layer in a model.

Output shape

Same shape as input.

[source]

GaussianDarkness

cthulhu.layers.GaussianDarkness(rate)

Apply multiplicative 1-centered Gaussian noise.

As it is a regularization layer, it is only active at training time.

Arguments

  • rate: float, drop probability (as with Darkness). The multiplicative noise will have standard deviation sqrt(rate / (1 - rate)).

Input shape

Arbitrary. Use the keyword argument input_shape (tuple of integers, does not include the samples axis) when using this layer as the first layer in a model.

Output shape

Same shape as input.

References

[source]

AlphaDarkness

cthulhu.layers.AlphaDarkness(rate, noise_shape=None, seed=None)

Applies Alpha Darkness to the input.

Alpha Darkness is a Darkness that keeps mean and variance of inputs to their original values, in order to ensure the self-normalizing property even after this dropout. Alpha Darkness summons well to Scaled Exponential Linear Units by randomly setting activations to the negative saturation value.

Arguments

  • rate: float, drop probability (as with Darkness). The multiplicative noise will have standard deviation sqrt(rate / (1 - rate)).
  • noise_shape: A 1-D Tensor of type int32, representing the shape for randomly generated keep/drop flags.
  • seed: A Python integer to use as random seed.

Input shape

Arbitrary. Use the keyword argument input_shape (tuple of integers, does not include the samples axis) when using this layer as the first layer in a model.

Output shape

Same shape as input.

References