Spatial 2D version of Dropout.

This version performs the same function as Dropout, however it drops entire 2D feature maps instead of individual elements. If adjacent pixels within feature maps are strongly correlated (as is normally the case in early convolution layers) then regular dropout will not regularize the activations and will otherwise just result in an effective learning rate decrease. In this case, layer_spatial_dropout_2d will help promote independence between feature maps and should be used instead.

layer_spatial_dropout_2d(object, rate, data_format = NULL,
  batch_size = NULL, name = NULL, trainable = NULL, weights = NULL)

Arguments

object

Model or layer object
rate

float between 0 and 1. Fraction of the input units to drop.
data_format

'channels_first' or 'channels_last'. In 'channels_first' mode, the channels dimension (the depth) is at index 1, in 'channels_last' mode is it at index 3. It defaults to the image_data_format value found in your Keras config file at ~/.keras/keras.json. If you never set it, then it will be "channels_last".
batch_size

Fixed batch size for layer
name

An optional name string for the layer. Should be unique in a model (do not reuse the same name twice). It will be autogenerated if it isn't provided.
trainable

Whether the layer weights will be updated during training.
weights

Initial weights for layer.

Input shape

4D tensor with shape: (samples, channels, rows, cols) if data_format='channels_first' or 4D tensor with shape: (samples, rows, cols, channels) if data_format='channels_last'.

Output shape

Same as input

References

- Efficient Object Localization Using ConvolutionalNetworks

See also

Other dropout layers: layer_dropout, layer_spatial_dropout_1d, layer_spatial_dropout_3d