ZHANG Qingsong,SUN Linjun,YANG Guowei,LU Baoli,NING Xin,LI Weijun.TBNN: totally-binary neural network for image classification[J].Optoelectronics Letters,2023,(2):117-122
TBNN: totally-binary neural network for image classification
Author NameAffiliation
ZHANG Qingsong School of Electronic Information, Qingdao University, Qingdao 266071, China
Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China 
SUN Linjun Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China 
YANG Guowei School of Electronic Information, Qingdao University, Qingdao 266071, China 
LU Baoli Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China 
NING Xin Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China 
LI Weijun Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China 
Abstract:
      Most binary networks apply full precision convolution at the first layer. Changing the first layer to the binary convolution will result in a significant loss of accuracy. In this paper, we propose a new approach to solve this problem by widening the data channel to reduce the information loss of the first convolutional input through the sign function. In addition, widening the channel increases the computation of the first convolution layer, and the problem is solved by using group convolution. The experimental results show that the accuracy of applying this paper's method to state-of-the-art (SOTA) binarization method is significantly improved, proving that this paper's method is effective and feasible.
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