摘要
研究了对多光谱成像系统进行光谱估计的精度评价的问题。在给出光谱估计偏指数定义的基础上,提出了多光谱图像获取系统的光谱估计性能的评价的新方法——系统光谱匹配偏度指数法。该方法用一个指标来定量评价两光谱向量的光谱匹配程度,避免了以往评价参数的复杂性,同时反映了光谱反射率估计曲线实际测量曲线之间的差异程度。采用一典型多光谱相机对Macbeth色卡的24个典型光谱仿真估计所得的24个光谱对数值模拟,验证了光谱反射率估计匹配偏度指数能全面的反映光谱反射率的估计精度的设想;并拿17个多光谱估计系统的仿真估计的光谱数据,计算了它们的系统光谱估计偏度指数,计算结果有很好的一致性。结果还显示,系统光谱估计偏度指数还可用作对多光谱相机光谱估计性能进行等级划分的依据。
The present paper is related to the problem of evaluating the spectrum estimation precision of multispectral imaging camera. First, the definition of index of shifting degree（ISD） is given mathematically. Then, a new method, the index of system spectrum estimation shifting degree（ISSD）, to evaluate the spectral match ability of multispectral camera is proposed. Both of them use only one index to evaluate the match degree of spectrum curve pairs and the spectrum estimation performance of multispectral camera（system） quantitatively. The feasibility of the newly advanced index is verified via numerical calculation, with the data of 24 typical spectrum pairs and that of 17 intended designed multispectral cameras＇ simulation results. The results of numerical calculation of the parameter also indicated that the ISSD may be served as a criterion to classify multispectral cameras with different spectrum estimation performance.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2007年第8期1461-1464,共4页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(60377042)资助
关键词
多光谱图像
光谱估计精度
光谱匹配偏度指数
系统光谱估计偏度指数
Multispectral camera
Spectrum estimation precision
Index of spectrum shifting degree （ISD）
Index of system spectrum estimation shifting degree（ISSD）
