Sigmoid Layer

• Layer type: Sigmoid
• Doxygen Documentation
• Header: ./include/caffe/layers/sigmoid_layer.hpp
• CPU implementation: ./src/caffe/layers/sigmoid_layer.cpp
• CUDA GPU implementation: ./src/caffe/layers/sigmoid_layer.cu

• Example (from ./examples/mnist/mnist_autoencoder.prototxt):

  layer {
    name: "encode1neuron"
    bottom: "encode1"
    top: "encode1neuron"
    type: "Sigmoid"
  }
  

The Sigmoid layer computes sigmoid(x) for each element x in the bottom blob.

Parameters

• Parameters (SigmoidParameter sigmoid_param)
• From ./src/caffe/proto/caffe.proto:

message SigmoidParameter {
  enum Engine {
    DEFAULT = 0;
    CAFFE = 1;
    CUDNN = 2;
  }
  optional Engine engine = 1 [default = DEFAULT];
}