Empirical Line Method Using Spectrally Stable Targets to Calibrate IKONOS Imagery  

作　　者：XU Jun-Feng 

机构地区：[1]Institute of Agricultural Remote Sensing and Information Technology, Zhejiang University, Hangzhou 310029 （China）.

出　　处：《Pedosphere》2008年第1期124-130,共7页土壤圈（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (No.40171065);the National High Technology Research and Development Program of China (Nos.2002AA130010-2-7 and 2003AA131020-04-06).

摘　　要：By using speetrally stable targets, the empirical line （EL） method was tested to correct the multispectral IKONOS imagery acquired over Putuo Mountain, Zhejiang, China. A series of calibration targets, which were spectrally stable over time, were selected to establish the linear predicted equation. Subsequently, a series of spectrally stable validation targets were selected to assess the accuracy of the equations. And, validation targets, which were speetrally unstable over time, were used to test the feasibility of using the EL method to calibrate the archival remotely sensed data. Ground reflectance measurements for each target were made using an ASD FieldSpec spectroradiometer. A Trimble GeoXTTM GPS unit with sub-meter accuracy was used to estimate the target position accurately. Linear regression equations for four tKONOS bands were derived. The coefficients of determination for the blue, green, and red bands were all greater than 0.9800 and it was 0.9697 for the near infrared band. It was concluded that reasonable results could be obtained by using speetrally stable targets.由使用幽灵似地稳定的目标，实验的线(EL ) 方法被测试改正多光谱在 Putuo 山上获得的 IKONOS 形象，浙江，中国。一系列刻度目标，随着时间的过去幽灵似地稳定，被选择建立线性预言的方程。随后，一系列幽灵似地稳定的确认目标被选择估计方程的精确性。并且，确认目标，随着时间的过去幽灵似地不稳定，被用来测试使用 EL 方法校准档案的遥远地察觉到的数据的可行性。为每个目标的地面反射大小用一个 ASD FieldSpec 分光辐射函数被做。Trimble GeoXT？与亚米精确性联合起来的 GPS 被用来精确地估计目标位置。为四个 IKONOS 乐队的线性回归方程被导出。为蓝、绿、红的乐队的决心的系数都比 0.9800 大，它为近红外线的乐队是 0.9697。合理结果能被使用幽灵似地稳定的目标获得，这被结束。

关 键 词：CALIBRATION empirical line method  IKONOS spectrally stable targets 

分 类 号：S15[农业科学—土壤学]