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Unsupervised Classification of Hyperspectral Images based on Spectral Features

机译:基于光谱特征的高光谱图像无监督分类

摘要

In this world of Big Data, large quantities of data are been created everyday from all the type of visual sensors available in the hands of mankind. One important data is that we obtain from satellite of the land image. The application of these data are numerous. They have been used in classification of land regions, change detection of an area over a period of time, detecting different anomalies in the area and so on. As data is increasing at a high rate, so manually doing these jobs is not a good idea. So, we have to apply automated algorithms to solve these jobs. The images we see generally consists of visible light in Red, Green and Blue bands, but light of different wavelength differ in their properties of passing obstacle. So, there has been considerable research going on continuous spectra images. These images are called Hyper-spectral Image. In this thesis, I have gone through many classic machine learning algorithms like K-means, Expectation Maximization, Hierarchical Clustering, some out of box methods like Unsupervised Artificial DNA Classifier, Spatial Spectral Information which integrates both features to get better classification and a variant of Maximal Margin Clustering which uses K-Nearest Neighbor algorithm to cross validate and get the best set to separate. Sometimes PCA is used get best features from the dataset. Finally all the results are compared
机译:在当今的大数据世界中,每天都会使用人类手中所有类型的视觉传感器来创建大量数据。一个重要的数据是我们从陆地图像的卫星获得。这些数据的应用众多。它们已用于土地区域分类,一段时间内某个区域的变化检测,该区域中不同异常的检测等。由于数据正在高速增长,因此手动执行这些作业不是一个好主意。因此,我们必须应用自动化算法来解决这些工作。我们看到的图像通常由红色,绿色和蓝色波段的可见光组成,但是不同波长的光在通过障碍物时的性质不同。因此,对连续光谱图像进行了大量研究。这些图像称为高光谱图像。在这篇论文中,我经历了许多经典的机器学习算法,例如K-means,期望最大化,层次聚类,一些开箱即用的方法,例如无监督人工DNA分类器,空间光谱信息,它们结合了这两种功能以获得更好的分类和变体。最大边距聚类使用K最近邻算法进行交叉验证并获得最佳集合以进行分离。有时,使用PCA可以从数据集中获得最佳功能。最后将所有结果进行比较

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    Senapati Subhrajyoti;

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  • 年度 2015
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