| 野外植物波谱中噪声分布规律研究 |
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| 引用本文： | 周广柱,王翠珍,杨锋杰. 野外植物波谱中噪声分布规律研究[J]. 武汉理工大学学报(交通科学与工程版), 2008, 32(5) |
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| 作者姓名： | 周广柱 王翠珍 杨锋杰 |
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| 作者单位： | 1. 山东科技大学化学与环境工程学院,青岛,266510
2. 山东科技大学地质科学与工程学院,青岛,266510 |
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| 摘 要： | 基于空间相关算法和小波方差估计法,进行了噪声检测.实验表明,野外波谱噪声总体方差数量级介于10-2～10.之间,在350～1 300 nm.野外波谱曲线的噪声方差略高于JPL光谱库中的Conifers,1450 nm和1800 nm附近则噪声相当显著.野外波谱曲线的小波系数能量分布与加性仿真信号不同.在1450 nm和1800 nm附近,噪声在高分解尺度上表现为尖锐毛刺的减少,噪声能量减弱同时在这2个区段的信号总体能量逐渐增大,证明有波谱特征信号存在.野外波谱数据中这种尖锐噪声与2个污噪信号相除得到的复合信号表现出相似的特征,其能量传播特征也相似.
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| 关 键 词： | 植物波谱 噪声检测 小波 仿真实验 |
Noise Analysis on Field Collected Vegetation Spectrum |
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| Zhou Guangzhu,Wang Cuizhen,Yang Fengjie. Noise Analysis on Field Collected Vegetation Spectrum[J]. journal of wuhan university of technology(transportation science&engineering), 2008, 32(5) |
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| Authors: | Zhou Guangzhu Wang Cuizhen Yang Fengjie |
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| Affiliation: | School of Chemistry & Environment Engineering;Shandong University of Science & Technology;Qingdao 266510;School of Geoinfomation Science & Technology;Qingdao 266510 |
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| Abstract: | In this article noise existing in field collected vegetation spectrum was analyzed via wavelet spatial algorithm.Bumps,heavy sine and vegetation spectrum from JPL were used as noise contaminated signals and simulating experiments verified its effectiveness.Noise detecting experiments proved that heavy noise existed in field spectrums;the total variance was up to 10-2 to 100 and far exceeded that from the JPL.Comparing with the spectrums from JPL,noise mainly existed nearby 1 450 nm and 1 800 nm.The field co... |
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| Keywords: | vegetation spectrum noise analysis wavelet simulation experiment |
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