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首页> 外文期刊>Weed Research >Discrimination of Ambrosia artemisiifolia and Artemisia vulgaris by hyperspectral image analysis during the growing season
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Discrimination of Ambrosia artemisiifolia and Artemisia vulgaris by hyperspectral image analysis during the growing season

机译：生长期高光谱图像分析法鉴别青蒿和寻常型蒿

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摘要

Ambrosia artemisiifolia (ragweed) is an invasive plant in Europe. An optical detection system for effective monitoring requires differences in the spectral reflectance properties compared with other plant species. A.artemisiifolia often occurs together with Artemisia vulgaris (mugwort). Both plant species are of the Asteraceae family and they are almost indistinguishable in appearance. With the help of hyperspectral image analysis, a method was developed to determine characteristic wavelengths for their classification. High-resolution hyperspectral images (4001000nm) were generated indoors. The factors measured were two weed species, two tissue classes (leaf and stem) and three growth stages (rosette growth, inflorescence emergence and fruit development). Only the stems of A.artemisiifolia in the fruit development stage showed different reflectance behaviour compared with its leaves and with the stems and leaves of A.vulgaris. At wavelengths ranging from 550 to 650nm, the reflectance increased, and then at wavelengths up to 680nm, the reflectance decreased. The other tissue classes showed constantly decreasing spectral reflectance from 550 to 680nm. In the two other early growth stages, the reflectance of all four tissue classes decreased similarly. Thus, using two wavelengths of 550 and 650nm, classification between A.artemisiifolia and A.vulgaris at fruit development was achieved. The findings could be a first step to develop an optical outdoor detection system to identify hot spots of A.artemisiifolia.
机译：青蒿（Ambrosia artemisiifolia）（豚草）是欧洲的一种入侵植物。与其他植物种类相比，用于有效监控的光学检测系统要求光谱反射率特性有所不同。青蒿通常与寻常蒿（艾蒿）一起出现。两种植物都属于菊科，它们的外观几乎没有区别。借助于高光谱图像分析，开发了一种确定特征波长以对其进行分类的方法。在室内生成高分辨率的高光谱图像（4001000nm）。所测量的因素是两种杂草种类，两种组织类别（叶和茎）和三个生长阶段（玫瑰花生长，花序出苗和果实发育）。仅在果实发育阶段的青蒿茎与它的叶子以及与寻常农杆菌的茎和叶子相比，才表现出不同的反射行为。在550至650nm的波长范围内，反射率增加，然后在高达680nm的波长处，反射率减小。其他组织类别显示光谱反射率从550nm不断降低到680nm。在另外两个早期生长阶段，所有四个组织类别的反射率都类似地下降。因此，使用550和650nm的两个波长，在果实发育时实现了青蒿和普通农杆菌之间的分类。该发现可能是开发光学室外检测系统以识别青蒿的热点的第一步。

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