layer_upsampling_3d: Upsampling layer for 3D inputs.

View source: R/layers-convolutional.R

layer_upsampling_3dR Documentation

Upsampling layer for 3D inputs.


Repeats the 1st, 2nd and 3rd dimensions of the data by size[[0]], size[[1]] and size[[2]] respectively.


  size = c(2L, 2L, 2L),
  data_format = NULL,
  batch_size = NULL,
  name = NULL,
  trainable = NULL,
  weights = NULL



What to compose the new Layer instance with. Typically a Sequential model or a Tensor (e.g., as returned by layer_input()). The return value depends on object. If object is:

  • missing or NULL, the Layer instance is returned.

  • a Sequential model, the model with an additional layer is returned.

  • a Tensor, the output tensor from layer_instance(object) is returned.


int, or list of 3 integers. The upsampling factors for dim1, dim2 and dim3.


A string, one of channels_last (default) or channels_first. The ordering of the dimensions in the inputs. channels_last corresponds to inputs with shape ⁠(batch, spatial_dim1, spatial_dim2, spatial_dim3, channels)⁠ while channels_first corresponds to inputs with shape ⁠(batch, channels, spatial_dim1, spatial_dim2, spatial_dim3)⁠. 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".


Fixed batch size for layer


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.


Whether the layer weights will be updated during training.


Initial weights for layer.

Input shape

5D tensor with shape:

  • If data_format is "channels_last": ⁠(batch, dim1, dim2, dim3, channels)⁠

  • If data_format is "channels_first": ⁠(batch, channels, dim1, dim2, dim3)⁠

Output shape

5D tensor with shape:

  • If data_format is "channels_last": ⁠(batch, upsampled_dim1, upsampled_dim2, upsampled_dim3, channels)⁠

  • If data_format is "channels_first": ⁠(batch, channels, upsampled_dim1, upsampled_dim2, upsampled_dim3)⁠

See Also

Other convolutional layers: layer_conv_1d(), layer_conv_1d_transpose(), layer_conv_2d(), layer_conv_2d_transpose(), layer_conv_3d(), layer_conv_3d_transpose(), layer_conv_lstm_2d(), layer_cropping_1d(), layer_cropping_2d(), layer_cropping_3d(), layer_depthwise_conv_1d(), layer_depthwise_conv_2d(), layer_separable_conv_1d(), layer_separable_conv_2d(), layer_upsampling_1d(), layer_upsampling_2d(), layer_zero_padding_1d(), layer_zero_padding_2d(), layer_zero_padding_3d()

keras documentation built on May 29, 2024, 3:20 a.m.