于佳宁, 闫德勤, 刘德山, 张景. 空谱超像素核极限学习机的高光谱分类算法[J]. 微电子学与计算机, 2022, 39(5): 45-52. DOI: 10.19304/J.ISSN1000-7180.2021.1217
引用本文: 于佳宁, 闫德勤, 刘德山, 张景. 空谱超像素核极限学习机的高光谱分类算法[J]. 微电子学与计算机, 2022, 39(5): 45-52. DOI: 10.19304/J.ISSN1000-7180.2021.1217
YU Jianing, YAN Deqin, LIU Deshan, ZHANG Jing. Spatial-spectral superpixel fusion on extreme learning machine with kernel for hyperspectral image classification[J]. Microelectronics & Computer, 2022, 39(5): 45-52. DOI: 10.19304/J.ISSN1000-7180.2021.1217
Citation: YU Jianing, YAN Deqin, LIU Deshan, ZHANG Jing. Spatial-spectral superpixel fusion on extreme learning machine with kernel for hyperspectral image classification[J]. Microelectronics & Computer, 2022, 39(5): 45-52. DOI: 10.19304/J.ISSN1000-7180.2021.1217

空谱超像素核极限学习机的高光谱分类算法

Spatial-spectral superpixel fusion on extreme learning machine with kernel for hyperspectral image classification

  • 摘要: 针对高光谱图像中光谱信息提取时高维特征向量由于部分邻域叠加造成数据缺损,以及图像局部区域像素点在空间结构信息中存在同谱异类现象和密度差异的问题,提出了一种基于空谱超像素融合核极限学习机(SSKELM)的高光谱图像分类算法.对光谱空间第一主成分分量进行超像素分割,每个超像素被看作一个形状自适应区域。利用空间信息、超像素内及像元间的核权重融合,获取像素点类别标签; 同时,借助核函数在高维超平面数据中线性可分能力、极限学习机随机隐藏层输出矩阵及其优化算法的限制条件少等优势,将空谱像素点融合训练并形成新的矩阵样本输出.使用University of Pavia和Indian Pines两个数据集进行实验,总体准确率OA值较其他算法分别提高了1.76%和2.80%,有效验证本文提出方法在图像分类中具有一定价值.

     

    Abstract: High-dimensional feature vector is defectivedue to partial neighborhood superposition when extracting spectral information in hyperspectral image, and the pixels in the local region of the image have the problems are easily affected by density difference and homospectral dissimilarity, a hyperspectral image classification algorithm based on spatial spectrum super-pixel fusion kernel extreme learning machine(SSKELM) is proposed.The first principal component of the spectral space is super-pixel segmented, and each super-pixel is regarded as a shape adaptive region. Using the spatial information, the kernel weight fusion within and between super pixels to obtain the pixel category label, and taking advantage of the linear separability of kernel function in high-dimensional hyperplane data and the limited conditions of limit learning machine random hidden layer output matrix and its optimization algorithm, the spatial spectrum pixel points are fused and trained to form a new matrix sample output. Compared with the real results, the overall accuracy of the test results conducted through the University of Pavia and Indian pines data sets, the overall accuracy OA value is improved by 1.76% and 2.80% respectively compared with other algorithms. It effectively verifies that the proposed method has a certain value in HSI classification.

     

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