Multiscale spatial-spectral convolutional network with image-based framework for hyperspectral imagery classification.

Cui, Ximin; Zheng, Ke; Gao, Lianru; Zhang, Bing; Yang, Dong; Ren, Jinchang

Abstract

Jointly using spatial and spectral information has been widely applied to hyperspectral image (HSI) classification. Especially, convolutional neural networks (CNN) have gained attention in recent years due to their detailed representation of features. However, most of CNN-based HSI classification methods mainly use patches as input classifier. This limits the range of use for spatial neighbor information and reduces processing efficiency in training and testing. To overcome this problem, we propose an image-based classification framework that is efficient and straight forward. Based on this framework, we propose a multiscale spatial-spectral CNN for HSIs (HyMSCN) to integrate both multiple receptive fields fused features and multiscale spatial features at different levels. The fused features are exploited using a lightweight block called the multiple receptive field feature block (MRFF), which contains various types of dilation convolution. By fusing multiple receptive field features and multiscale spatial features, the HyMSCN has comprehensive feature representation for classification. Experimental results from three real hyperspectral images prove the efficiency of the proposed framework. The proposed method also achieves superior performance for HSI classification.

Citation

CUI, X., ZHENG, K., GAO, L., ZHANG, B., YANG, D. and REN, J. 2019. Multiscale spatial-spectral convolutional network with image-based framework for hyperspectral imagery classification. Remote sensing [online], 11(19), article 2220. Available from: https://doi.org/10.3390/rs11192220

• Journal Article Type: Article
• Acceptance Date: Sep 17, 2019
• Online Publication Date: Sep 23, 2019
• Publication Date: Oct 1, 2019
• Deposit Date: May 2, 2022
• Publicly Available Date: May 2, 2022
• Journal: Remote Sensing
• Electronic ISSN: 2072-4292
• Publisher: MDPI
• Peer Reviewed: Peer Reviewed
• Volume: 11
• Issue: 19
• Article Number: 2220
• DOI: https://doi.org/10.3390/rs11192220
• Keywords: Hyperspectral image classification; Convolutional neural network; Multiscale spatial-spectral features; Spatial neighbor feature extraction; Dilation convolution; Feature pyramid
• Public URL: https://rgu-repository.worktribe.com/output/1085457