Convolutional Neural Network Based on Spatial Pyramid for Image Classification |
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Authors: | Gaihua Wang Meng L Tao Li Guoliang Yuan and Wenzhou Liu |
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Affiliation: | Hubei Collaborative Innovation Centre for High-Efficiency Utilization of Solar Energy, Hubei University of Technology, Wuhan 430068, China;School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan 430068, China,School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan 430068, China,School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan 430068, China,School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan 430068, China and School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan 430068, China |
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Abstract: | A novel convolutional neural network based on spatial pyramid for image classification is proposed. The network exploits image features with spatial pyramid representation. First, it extracts global features from an original image, and then different layers of grids are utilized to extract feature maps from different convolutional layers. Inspired by the spatial pyramid, the new network contains two parts, one of which is just like a standard convolutional neural network, composing of alternating convolutions and subsampling layers. But those convolution layers would be averagely pooled by the grid way to obtain feature maps, and then concatenated into a feature vector individually. Finally, those vectors are sequentially concatenated into a total feature vector as the last feature to the fully connection layer. This generated feature vector derives benefits from the classic and previous convolution layer, while the size of the grid adjusting the weight of the feature maps improves the recognition efficiency of the network. Experimental results demonstrate that this model improves the accuracy and applicability compared with the traditional model. |
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Keywords: | convolutional neural network multiscale feature extraction image classification |
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