对比植物物种的双锥形反射率因子:天顶角建模

IF 0.3 Q4 AGRONOMY Terra Latinoamericana Pub Date : 2018-04-16 DOI:10.28940/TERRA.V36I2.226
A. J. González, Fernando Paz Pellat, M. Marín, E. L. Bautista, J. Chavez, Martínez Bolaños, J. L. Oropeza
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引用次数: 1

摘要

利用多角度反射率信息对不同表征方法下的自然植被进行分类。虽然这种方法显然能够可靠地定义典型的多角光谱特征,但其广泛的应用尚未得到分析。本文提出了在双圆锥体视觉照明条件下,观察和照明天顶角和光照对反射率影响的模型,并在8种对比植物和裸地上进行了一系列实验验证。结果表明,该模型具有鲁棒性和可靠性,可用于实际应用。对土壤和植物密度影响的分析表明,在考虑不同方位角的综合影响时,物种之间存在重要的混淆区域(重叠信息)。这些结果挑战了多角度光谱信息的广泛使用,并且只有在植被背景和植物密度(叶片数量)固定的情况下才证明这种方法是正确的。
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Factor de la reflectancia bi-cónica en especies vegetales contrastantes: modelación de los ángulos cenitales
The multi-angular reflectance information has been proposed for discrimination of classes of natural vegetation under different characterization approaches. Although apparently this method enables reliable definition of typical multi-angular spectral signatures, its widespread use has not been analyzed. This paper presents a model of the effects of viewing and illumination zenith angle and lighting on reflectance and is validated in a set of experiments with eight contrasting plant species plus bare ground, under bi-conical vision lighting conditions. The results show that the proposed model is robust and reliable and can thus be used operationally. Analyses to determine the effect of soil and plant density show that there are important areas of confusion (overlapping information) between species when considering combined effects for different azimuthal angles. These results challenge the widespread use of multi-angular spectral information and justify this approach only if the vegetation background and plant density (amount of foliage) are fixed.
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来源期刊
Terra Latinoamericana
Terra Latinoamericana Environmental Science-Ecology
CiteScore
1.10
自引率
0.00%
发文量
49
审稿时长
16 weeks
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