| 茶树冠层光谱特征及混合像元模拟研究 |
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| 引用本文： | 黄传印,陈文惠.茶树冠层光谱特征及混合像元模拟研究[J].福建地理,2014(2):82-87. |
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| 作者姓名： | 黄传印 陈文惠 |
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| 作者单位： | [1]黎明职业大学信息与电子工程学院,福建泉州362000 [2]福建师范大学地理科学学院,福州350007 |
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| 基金项目： | 福建省教育厅A类科技项目（JAl0282） |
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| 摘 要： | 准确提取端元并确定像元中端元组分和丰度是提高遥感分类精度的基础和前提。本研究根据福建省多数茶园特点,从对地观测角度将茶园分为垄前冠面、垄后冠面、沟中阴影面和沟中光照面4种端元,并测定各类端元光谱特征。根据光线入射方向和地形参数计算茶园中任意端元组合面的丰度,利用几何光学模型进行组分光谱混合模拟,最后把模拟结果与实测结果相比较。研究结果发现,模拟和实测的光谱曲线很接近,光谱的反射峰、吸收谷位置基本吻合,总体精度在85%以上,说明采用组分合成法模拟茶园光谱是可行的。
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| 关 键 词： | 茶树 光谱 端元 组分 像元 |
Spectral Features of Camellia sinensis Canopy and Mixed Pixel Simulation Based on Hyperspectral Data |
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| HUANG Chuan-yin,CHEN Wen-hui.Spectral Features of Camellia sinensis Canopy and Mixed Pixel Simulation Based on Hyperspectral Data[J].Fujian Geography,2014(2):82-87. |
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| Authors: | HUANG Chuan-yin CHEN Wen-hui |
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| Institution: | 1. School of Information and Electronic Engineering, Liming Vocational University, Quanzhou 362000, Fujian, China; 2. School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China) |
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| Abstract: | Accurate extraction of endmembers and calculation of their composition and abundance in each pixel are the foundation as well as prerequisite for increasing classification accuracy of remotesensing. According to the general features of tea plantations in Fujian, endmembers of tea plantations were divided into four kinds, including surface of front canopy, surface of behind canopy, shadow areaof ditch and illumination area of ditch. Then, the spectral reflectance of each endmember was measured, and the abundance of each combination of tea plantations was calculated by incident light directions and topographic parameters. Spectra of tea plantations of mixed endmembers were simulated using GO model. And, the simulation spectrum was compared with that in situ. By comparing the results, itwas found that the two kinds of spectral curve were very similar to each other and the reflection peak or valley locations were close. The total simulation accuracy of the model was above 85%, showing thefeasibility of GO model in tea plantations. |
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| Keywords: | Camellia sinensis spectrum endmember composition pixel |
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