基于双网络级联卷积神经网络的设计

Design of Convolutional Neural Network Based on Dual-Network Cascade

传统的卷积神经网络通常采用单一的网络结构进行特征提取,但是单一网络结构提取的特征不够充分,导致图片分类的精度不高。针对这个问题提出了采用两种网络同时进行特征提取,再将两种网络级联在一起,得到两种网络的融合特征,使提取的特征更具有辨别性。双网络级联是采用两条支路进行特征提取,一条支路为传统的CNN,另一条支路为在传统的CNN基础上加上残差操作,在下一次特征图降维前通过级联操作将两条不同的网络支路结合在一起。本网络实验采用101_food和caltech256数据集进行测试,将级联后的网络和两条支路网络进行对比,实验最后表现出较好的结果。

Convolutional Neural Network( CNN) usually adopts a single network for feature extraction.However, the extracted features are not sufficient, which may result in the poor accuracy in image classification.To solve the problem, it is proposed to use two networks for extracting features simultaneously. Then the two networks are cascaded together to obtain the fused features of the two networks, which makes the extracted features more discriminative. The dual-network cascade uses two network branches for feature extraction. One branch is the traditional CNN. The other branch is the traditional CNN plus the residual operation. Before the next dimensional reduction of the feature map, the two different branches are put together. We use the data sets of 101_food and caltech 256 to test the networks. The cascaded network is compared with the two separate branches, and the results are favorable.