COMPARISON OF BROAD-BAND AND NARROW-BAND RED AND NEAR-INFRARED VEGETATION INDEXES
COMPARISON OF BROAD-BAND AND NARROW-BAND RED AND NEAR-INFRARED VEGETATION INDEXES
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DOI：
10.1016/0034-4257(95)00132-k
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发表时间：
1995-10-01
影响因子：
13.5
通讯作者：
CHEN, ZK
中科院分区：
文献类型：
--
作者：
ELVIDGE, CD;CHEN, ZK
本文对不同砾石背景下的有顶松冠层进行了野外窄带反射光谱的采集实验。重复测量时，连续取出叶面积茶。从这些反射光谱，窄带和宽带（AVHRR，TM，MSS）的红色和近红外（NIR）植被指数值进行了计算。植被指数的性能进行了评估的基础上，他们的能力，准确地估计叶面积指数（LAI）和百分比绿色覆盖。背景效应被发现为每个测试的植被指数。然而，背景效应在归一化差异植被指数（NDVI）和比率植被指数（RVI）中最为明显。可使用垂直植被指数或土壤调整植被指数公式来减少背景效应。这些植被指数的窄带版本仅比宽带版本的精确度略高。使用基于导数的植被指数将背景效应降至最低，该指数使用626 nm至795 nm的连续窄带光谱测量叶绿素红边的幅度。
An experiment has been conducted in which narrow-band field reflectance spectra were acquired of a roofed pinyon pine canopy with Fee different gravel backgrounds. Leaf area teas successively removed as the measurements were repeated. From these reflectance spectra, narrow-band and broad-band (AVHRR, TM, MSS) red and near-infrared (NIR) vegetation index values were calculated. The performance of the vegetation indices was evaluated based on their capability to accurately estimate leaf area index (LAI) and percent green cover. Background effects were found for each of the tested vegetation indices. However the background effects are most pronounced in the normalized difference vegetation index (NDVI) and ratio vegetation index (RVI). Background effects can be reduced using either the perpendicular vegetation index (PVI) or soil adjusted vegetation index (SAVI) formulations. The narrow-band versions of these vegetation indices had only slightly better accuracy than their broad-band counterparts. The background effects were minimized using derivative based vegetation indices, which measure the amplitude of the chlorophyll red-edge using continuous narrow-band spectra from 626 nm to 795 nm.