INFLUENCE OF ROCK SOIL SPECTRAL VARIATION ON THE ASSESSMENT OF GREEN BIOMASS
INFLUENCE OF ROCK SOIL SPECTRAL VARIATION ON THE ASSESSMENT OF GREEN BIOMASS
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DOI：
10.1016/0034-4257(85)90099-9
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发表时间：
1985-01-01
影响因子：
13.5
通讯作者：
LYON, RJP
中科院分区：
文献类型：
--
作者：
ELVIDGE, CD;LYON, RJP
岩石和土壤光谱特征的变化会对植被指数产生不利影响。当岩石和土壤产生不同的植被指数值时，这被误解为绿色生物量的变化。这种光谱影响在一定程度上存在于所有植被指数中。其次，岩土亮度的变化对基于比率的植被指数有很大的影响。岩土亮度的变化对所有基于比率的植被指数都有相同的影响：相对于明亮的背景，暗背景下的植被被高估了。总体而言，垂直植被指数是用于岩石和土壤光谱特征差异较大的干旱和半干旱地区多光谱图像的最佳植被指数。
Vegetation indices can be adversely influenced by variation in rock and soil spectral characteristics. When rocks and soils yield different vegetation index values, this is misinterpretated as changes in green biomass. This spectral influence is present to some extent in all vegetation indices. Secondly, variations in rock-soil brightness have a strong influence on ratio-based vegetation indices. Variations in rock-soil brightness have the same effect on all ratio-based vegetation indices: vegetation is overestimated on dark backgrounds relative to bright backgrounds. Overall, the perpendicular vegetation index is the best available vegetation index to use in multispectral imagery of arid and semiarid regions where there is wide variation in rock and soil spectral characteristics.