arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2304.09730cs.CV
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基于子空间学习的单类分类高光谱图像分析

Hyperspectral Image Analysis with Subspace Learning-based One-Class Classification

Izmir University of Economics(伊兹密尔经济大学);Tampere University(坦佩雷大学)

Sertac Kilickaya, Mete Ahishali, Fahad Sohrab, Turker Ince, Moncef Gabbouj

AI总结:

本文针对高光谱图像分类中的维度灾难和标签不平衡问题,提出基于子空间学习的单类分类框架,无需单独降维即可直接从单类样本学习数据描述,实验验证了其有效性。

摘要:

高光谱图像(HSI)分类在环境监测、医学成像以及土地利用/土地覆盖(LULC)分类等许多应用中是一项重要任务。由于近期HSI传感器提供了大量光谱信息,使用传统机器学习(ML)方法分析所获取的图像具有挑战性。随着频带数量增加,为达到合理的分类精度所需的训练样本数量呈指数增长,这也被称为维度灾难。因此,在对HSI数据执行任何分类任务之前,通常需要先应用单独的波段选择或降维技术。在本研究中,我们考察了最近提出的用于单类分类(OCC)的子空间学习方法。这些方法将高维数据映射到针对单类分类优化的低维特征空间。这样,在所提出的分类框架中就不需要单独的降维或特征选择步骤。此外,单类分类器能够仅从单个类别的样本中学习数据描述。考虑到LULC分类问题的标签不平衡以及丰富的光谱信息(高维数),所提出的分类方法非常适合HSI数据。总体而言,这是一项专注于基于子空间学习的HSI单类分类的开创性研究。我们在所提出的流程中分析了所提出的子空间学习单类分类器的性能。我们的实验验证了所提出的方法有助于应对维度灾难以及HSI数据的不平衡特性。

英文摘要:

Hyperspectral image (HSI) classification is an important task in many applications, such as environmental monitoring, medical imaging, and land use/land cover (LULC) classification. Due to the significant amount of spectral information from recent HSI sensors, analyzing the acquired images is challenging using traditional Machine Learning (ML) methods. As the number of frequency bands increases, the required number of training samples increases exponentially to achieve a reasonable classification accuracy, also known as the curse of dimensionality. Therefore, separate band selection or dimensionality reduction techniques are often applied before performing any classification task over HSI data. In this study, we investigate recently proposed subspace learning methods for one-class classification (OCC). These methods map high-dimensional data to a lower-dimensional feature space that is optimized for one-class classification. In this way, there is no separate dimensionality reduction or feature selection procedure needed in the proposed classification framework. Moreover, one-class classifiers have the ability to learn a data description from the category of a single class only. Considering the imbalanced labels of the LULC classification problem and rich spectral information (high number of dimensions), the proposed classification approach is well-suited for HSI data. Overall, this is a pioneer study focusing on subspace learning-based one-class classification for HSI data. We analyze the performance of the proposed subspace learning one-class classifiers in the proposed pipeline. Our experiments validate that the proposed approach helps tackle the curse of dimensionality along with the imbalanced nature of HSI data.

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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