Journal of Xidian University ›› 2019, Vol. 46 ›› Issue (3): 52-58.doi: 10.19665/j.issn1001-2400.2019.03.009

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Method for retrieving the teaching image based on the improved convolutional neural network

LIU Daohua1,2,CUI Yushuang1,ZHAO Yansong1,SONG Yuting1,WANG Jinghui1   

  1. 1. School of Computer and Information Technology, Xinyang Normal Univ. , Xinyang 464000, China
    2. Henan Key Lab. of Analysis and Applications of Education Big Data, Xinyang Normal Univ. , Xinyang 464000, China
  • Received:2018-11-21 Online:2019-06-20 Published:2019-06-19


Aiming at the loss of feature information caused by the convolution neural network in extracting image features and the reduction of high-dimensional image feature data, an image retrieval optimization scheme based on the improved convolution neural network is proposed. First, the image features are extracted through the convolutional layer of fusion, and a full connection layer is added between the convolutional layers of fusion to reduce the loss of image feature information. Then the PCA is used to effectively reduce the dimension of high-dimensional characteristic data and the high-dimensional feature vectors are mapped to the low-dimensional vector space. Finally, the cosine similarity method is used to match the similarity to achieve similar image retrieval. The proposed method is compared with classical methods such as LeNet-L and LeNet-5 in the performance of image retrieval. Experimental results show that the proposed retrieval method improves the recall rate and the average precision rate by at least 3%27.3% compared with classical methods.

Key words: image retrieval, convolution neural network, feature extraction, principal component analysis

CLC Number: 

  • TP399