二值网络--TBN: Convolutional Neural Network with Ternary Inputs and Binary Weights
TBN: Convolutional Neural Network with Ternary Inputs and Binary Weights
ECCV2018
本文的思路就是: 对 weight 进行二值量化+ scaling factor α , 对于 网络层的输入 进行 ternary value {−1,0,1} without the scaling factor
3 Ternary-Binary Networks
3.1 Convolution with Matrix Multiplication
use matrix multiplication to implement the convolution layer ⟨I,W,∗⟩
ten2mat 将一组滤波器 weight filters W can be reshaped to a matrix
ten2mat reshape the matrix back to output tensor C
3.2 Binary Weights
3.3 Ternary Inputs
the scaling factors of the binary inputs does not affect the performance of XNOR-Networks
这里我们不采用 scaling factor 了
3.4 Ternary-Binary Dot Product
这样卷积就没有乘法运算了,只有 位运算和 加减
量化梯度求导采用:
provides ∼ 32× memory savings and 40× faster convolutional operations
11
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