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Frontiers of Computer Science

Front. Comput. Sci.    2018, Vol. 12 Issue (6) : 1140-1148
Convolutional adaptive denoising autoencoders for hierarchical feature extraction
Qianjun ZHANG, Lei ZHANG()
Machine Intelligence Laboratory, College of Computer Science, Sichuan University, Chengdu 610065, China
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Convolutional neural networks (CNNs) are typical structures for deep learning and are widely used in image recognition and classification. However, the random initialization strategy tends to become stuck at local plateaus or even diverge, which results in rather unstable and ineffective solutions in real applications. To address this limitation, we propose a hybrid deep learning CNN-AdapDAE model, which applies the features learned by the AdapDAE algorithm to initialize CNN filters and then train the improved CNN for classification tasks. In this model, AdapDAE is proposed as a CNN pre-training procedure, which adaptively obtains the noise level based on the principle of annealing, by starting with a high level of noise and lowering it as the training progresses. Thus, the features learned by AdapDAE include a combination of features at different levels of granularity. Extensive experimental results on STL-10, CIFAR-10, andMNIST datasets demonstrate that the proposed algorithm performs favorably compared to CNN (random filters), CNNAE (pre-training filters by autoencoder), and a few other unsupervised feature learning methods.

Keywords convolutional neural networks      annealing      denoising autoencoder      adaptive noise level      pre-training     
Corresponding Authors: Lei ZHANG   
Just Accepted Date: 07 December 2016   Online First Date: 06 March 2018    Issue Date: 04 December 2018
 Cite this article:   
Qianjun ZHANG,Lei ZHANG. Convolutional adaptive denoising autoencoders for hierarchical feature extraction[J]. Front. Comput. Sci., 2018, 12(6): 1140-1148.
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Qianjun ZHANG
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