MaxUnpool3D

Performs an inverse of MaxPool3D. In contrast to the pooling, where the output becomes smaller, the output of the unpooling will be larger. To perform the inverse operation, the indexes that were selected in the original MaxPool3D operation needs to be provided.

The unpooling is not a direct inverse operation, since information is lost when pooling. The consequence is that only the positions where the original value had its maximum will be filled, all other positions will be populated with zeros.

Kernel size: The size of the window.
Stride: The number of places to move the window forward after each computation.
Padding: Number of elements with value negative infinity to add to each side of the input, before performing the operation.