arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1709.02253cs.CVcs.LG
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线性与非线性极端学习机在高光谱图像光谱-空间分类中的应用

Linear vs Nonlinear Extreme Learning Machine for Spectral-Spatial Classification of Hyperspectral Image

Guangdong University of Technology(广东工业大学);University of Strathclyde(思克莱德大学)

Faxian Cao, Zhijing Yang, Jinchang Ren, Mengying Jiang, Wing-Kuen Ling

摘要:

极限学习机(ELM)作为一种新的机器学习方法,因其良好的性能而受到广泛关注。然而,当直接应用于高光谱图像(HSI)分类时,识别率太低。这是因为ELM没有使用对HSI分类非常重要的空间信息。鉴于此,本文提出了一种新的框架,结合ELM和循环信念传播(LBP)的光谱-空间分类的HSI。原始ELM是线性的,非线性ELM(或核ELM)是线性ELM(LELM)的改进。然而,在大量的实验和分析的基础上,我们发现,LELM是一个更好的选择比非线性ELM的光谱空间分类的HSI。此外,我们利用边缘概率分布,使用整个信息在HSI和学习这样的分布使用LBP。该方法不仅保持了ELM的快速性,而且大大提高了分类精度。在著名的HSI数据集Indian Pines和Pavia University上的实验结果表明,该方法具有良好的性能。

英文摘要:

As a new machine learning approach, extreme learning machine (ELM) has received wide attentions due to its good performances. However, when directly applied to the hyperspectral image (HSI) classification, the recognition rate is too low. This is because ELM does not use the spatial information which is very important for HSI classification. In view of this, this paper proposes a new framework for spectral-spatial classification of HSI by combining ELM with loopy belief propagation (LBP). The original ELM is linear, and the nonlinear ELMs (or Kernel ELMs) are the improvement of linear ELM (LELM). However, based on lots of experiments and analysis, we found out that the LELM is a better choice than nonlinear ELM for spectral-spatial classification of HSI. Furthermore, we exploit the marginal probability distribution that uses the whole information in the HSI and learn such distribution using the LBP. The proposed method not only maintain the fast speed of ELM, but also greatly improves the accuracy of classification. The experimental results in the well-known HSI data sets, Indian Pines and Pavia University, demonstrate the good performances of the proposed method.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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