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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Defining optimum spectral narrow bands and bandwidths for agricultural applications
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Defining optimum spectral narrow bands and bandwidths for agricultural applications

机译：定义农业应用的最佳光谱窄带和带宽

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摘要

In this study, an attempt was made to define the optimum set of spectral narrowbands and the required bandwidth for agricultural applications. Spectral observations were collected using ASD handheld spectroradiometer (325-1075 nm) from major kharif (rainy) and rabi (winter) season crops, two different soil types and crops under different agronomic treatments. To identify best bands, a stepwise discriminant analysis (SDA) was carried out for each data set. Aggregating the bands selected from individual SDA, 13 optimum narrow bands were identified for crop and soil assessment. To find optimum bandwidth, the measured reflectance was aggregated to different bandwidths (3, 5, 10, 15, 20, 25 and 30 nm). The reflectance values at different wavelength regions were compared with the original spectra using root mean square error. It was found that the optimum bandwidth required for crop discrimination differed for different wavelength regions.
机译：在这项研究中，试图定义最佳的光谱窄带集和农业应用所需的带宽。使用ASD手持式分光光度计（325-1075 nm）从主要的哈里夫（雨季）和狂犬病（冬季）作物，两种不同的土壤类型和经过不同农艺处理的作物收集了光谱观测值。为了确定最佳波段，对每个数据集进行了逐步判别分析（SDA）。汇总从各个SDA中选择的条带，确定了13个最佳窄条用于作物和土壤评估。为了找到最佳带宽，将测得的反射率汇总到不同的带宽（3、5、10、15、20、25和30 nm）。使用均方根误差将不同波长区域的反射率值与原始光谱进行比较。发现对于作物识别所需的最佳带宽对于不同波长区域是不同的。

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