HYPERSPECTRAL REMOTE SENSING ROLE IN ENHANCING CROP MAPPING: A COMPARISON BETWEEN DIFFERENT SUPERVISED SEGMENTATION ALGORITHMS

M. Awad
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Abstract

In agriculture sector there is need for cheap, fast, and accurate data and technologies to help decision makers to find solutions for many agricultural problems. Many solutions depend significantly on the accuracy and efficiency of the crop mapping and crop yield estimation processes. High resolution spectral remote sensing can improve substantially crop mapping by reducing similarities between different crop types which has similar ecological conditions. This paper presents a new approach of combining a new tool, hyperspectral images and technologies to enhance crop mapping.  The tool includes spectral signatures database for the major crops in the Eastern Mediterranean Basin and other important metadata and processing functions. To prove the efficiency of the new approach, major crops such as “winter wheat” and “spring potato” are mapped using the spectral signatures database in the new tool, three different supervised algorithms, and CHRIS-Proba hyperspectral satellite images. The evaluation of the results showed that deploying different hyperspectral data and technologies can improve crop mapping. The improvements can be noticed with the increase of the accuracy to more than 86% with the use of the supervised algorithm Spectral Angle Mapper (SAM).
高光谱遥感在增强作物制图中的作用:不同监督分割算法的比较
在农业部门,需要廉价、快速和准确的数据和技术来帮助决策者找到解决许多农业问题的办法。许多解决方案在很大程度上依赖于作物测绘和作物产量估算过程的准确性和效率。高分辨率光谱遥感通过降低具有相似生态条件的不同作物类型之间的相似性,可以大大提高作物制图的质量。本文提出了一种结合新工具、高光谱图像和技术来增强作物制图的新方法。该工具包括东地中海盆地主要作物的光谱特征数据库以及其他重要的元数据和处理功能。为了证明新方法的有效性,利用新工具中的光谱特征数据库、三种不同的监督算法和CHRIS-Proba高光谱卫星图像对“冬小麦”和“春马铃薯”等主要作物进行了映射。结果表明,利用不同的高光谱数据和技术可以改善作物制图。使用有监督的谱角映射算法(SAM),可以将精度提高到86%以上。
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