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Visual data mining applied on earth observation datasets

机译:视觉数据挖掘应用于地球观测数据集

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In the quest of developing more accurate methodologies for Earth Observation (EO) image retrieval, visualization and information content exploration, a deep understanding of the data being analyzed is needed. In this paper we propose a simple but efficient visual data mining methodology that can be used for these tasks. Our solution consists in a patch-based feature extraction to derive image features and the projection of the achieved high dimensional feature space in a 3D space using dimensionality reduction methods. Gabor, Spectral Histogram and Bag-of-Words descriptors are the features assigned to represent the content of the data while PCA and t-SNE are the methods designed to achieve the 3D representation. The quality of information provided by the 3D visualization of the data depends on the extracted features. Therefore, a Sentinel-2 scene with various thematic classes is used for feature extraction and classification, to prove the performance of the selected descriptors.
机译:为了开发更精确的地球观测(EO)图像检索,可视化和信息内容探索方法,需要对正在分析的数据有深入的了解。在本文中,我们提出了一种简单但有效的可视数据挖掘方法,可以将其用于这些任务。我们的解决方案包括基于补丁的特征提取,以使用降维方法在3D空间中导出图像特征和获得的高维特征空间的投影。 Gabor,频谱直方图和单词袋描述符是分配用来表示数据内容的功能,而PCA和t-SNE是用来实现3D表示的方法。数据的3D可视化提供的信息质量取决于提取的特征。因此,具有各种主题类别的Sentinel-2场景用于特征提取和分类,以证明所选描述符的性能。

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