项目名称: 基于湖泊湿地表面反射波谱的高光谱信息定量反演
项目编号: No.51209019
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 水利科学与海洋工程学科
项目作者: 梁俊
作者单位: 长江水利委员会长江科学院
项目金额: 25万元
中文摘要: 高光谱影像可以快速而全面地获取湖泊湿地区域环境特征和植被空间分布信息,并进行定量反演,是构建湖泊湿地环境动态监测模型的关键技术问题之一。通过揭示湿地表面地物反射波谱的吸收特征对影像像元反射灰度值的影响机理,建立像元地物反射波谱模型,通过湿地表面植被反射波谱之间的相关性对比分析,获取最优的波段组合,实现湿地表面土壤含水量和湿地水环境指标特征的反演。 本项目的重点在于分析湿地表面地物反射波谱与高光谱影像像元灰度值的相关性,进行地物波谱重建技术研究,建立湿地环境动态监测的指标体系,从而掌握湖泊湿地环境动态变化趋势,为湿地保护与恢复、环境规划提供必要的基础数据和科学依据。
中文关键词: 高光谱;反射波谱;土壤含水量;定量反演技术;
英文摘要: Lake wetland environmental features and vegetation spatial distribution information can be obtained quickly and comprehensively by hyperspectral remote sensing technology. And the quantitative retrieval technology is one of the key technique problems in constructing dynamic monitoring model of lake wetland environment.Influence mechanism is revealed by studying the correlation between the absorption features of different bands on ground reflective spectrum and gray value of image pixel. The ground reflective spectrum model is established. And then the inversions of soil water content and environmental index characteristics are accomplished. Analyzing the correlation between ground reflective spectrum of lake wetland surface and pixel gray value of hyperspectral image and then researching of the ground reflective spectrum reconstruction technology, which will be beneficial to not only establishing dynamic monitoring index system but also mastering the dynamic changes tendency of lake wetland environment. It will provide basic data and scientific foundation for wetland protection and restoration.
英文关键词: Hyperspectral;Reflection spectrum;soil moisture;quantitative retrieval technology;