Eltwise层的操作有三个:product(点乘), sum(相加减) 和 max(取大值),其中sum是默认操作。

 

  假设输入(bottom)为A和B,如果要实现element_wise的A+B,即A和B的对应元素相加,prototxt文件如下:

layer 
{
  name: "eltwise_layer"
  type: "Eltwise"
  bottom: "A"
  bottom: "B"
  top: "diff"
  eltwise_param {
    operation: SUM
  }
}​

 

  如果实现A-B,则prototxt为:

layer 
{
  name: "eltwise_layer"
  type: "Eltwise"
  bottom: "A"
  bottom: "B"
  top: "diff"
  eltwise_param {
    operation: SUM
    coeff: 1
    coeff: -1
  }
}​

  其中A和B的系数(coefficient)都要给出!