Local block multilayer sparse extreme learning machine for effective feature extraction and classification of hyperspectral images.

Cao, Faxian; Yang, Zhijing; Ren, Jinchang; Chen, Weizhao; Han, Guojun; Shen, Yuzhen

Abstract

Although extreme learning machines (ELM) have been successfully applied for the classification of hyperspectral images (HSIs), they still suffer from three main drawbacks. These include: 1) ineffective feature extraction (FE) in HSIs due to a single hidden layer neuron network used; 2) ill-posed problems caused by the random input weights and biases; and 3) lack of spatial information for HSIs classification. To tackle the first problem, we construct a multilayer ELM for effective FE from HSIs. The sparse representation is adopted with the multilayer ELM to tackle the ill-posed problem of ELM, which can be solved by the alternative direction method of multipliers. This has resulted in the proposed multilayer sparse ELM (MSELM) model. Considering that the neighboring pixels are more likely from the same class, a local block extension is introduced for MSELM to extract the local spatial information, leading to the local block MSELM (LBMSELM). The loopy belief propagation is also applied to the proposed MSELM and LBMSELM approaches to further utilize the rich spectral and spatial information for improving the classification. Experimental results show that the proposed methods have outperformed the ELM and other state-of-the-art approaches.

Citation

CAO, F., YANG, Z., REN, J., CHEN, W., HAN, G. and SHEN, Y. 2019. Local block multilayer sparse extreme learning machine for effective feature extraction and classification of hyperspectral images. IEEE transactions on geoscience and remote sensing [online], 57(8), pages 5580-5594. Available from: https://doi.org/10.1109/tgrs.2019.2900509

• Journal Article Type: Article
• Acceptance Date: Feb 14, 2019
• Online Publication Date: Mar 19, 2019
• Publication Date: Aug 31, 2019
• Deposit Date: Mar 22, 2022
• Publicly Available Date: Mar 22, 2022
• Journal: IEEE transactions on geoscience and remote sensing
• Print ISSN: 0196-2892
• Electronic ISSN: 1558-0644
• Publisher: Institute of Electrical and Electronics Engineers (IEEE)
• Peer Reviewed: Peer Reviewed
• Volume: 57
• Issue: 8
• Pages: 5580-5594
• DOI: https://doi.org/10.1109/tgrs.2019.2900509
• Keywords: Alternative direction method of multipliers (ADMMs); Extreme learning machine (ELM); Hyperspectral images (HSI); Local block multilayer sparse ELM (LBMSELM); Loopy belief propagation (LBP)
• Public URL: https://rgu-repository.worktribe.com/output/1085626