The empirical line method for the atmospheric correction of IKONOS imagery
The empirical line method for the atmospheric correction of IKONOS imagery
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DOI：
10.1080/0143116021000026779
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发表时间：
2003-03-10
影响因子：
3.4
通讯作者：
Malthus, T
中科院分区：
文献类型：
--
作者：
Karpouzli, E;Malthus, T
经验线法是一种大气校正技术，为辐射传输建模方法提供了一种替代方法。它提供了1个相对简单的方法表面反射率校准。假设一系列时间不变的校准目标测量是可用的。这种技术已成功地应用于机载数据和较粗的空间分辨率卫星传感器数据。然而，随着空间分辨率更高的星载传感器的出现，有必要重新评估其潜力。经验线的方法进行了测试，纠正多光谱IKONOS影像收购了热带岛屿圣安德烈斯，哥伦比亚。数据的高空间分辨率（4米）使得有可能确定一些具有用于校准的反射率范围的均匀目标。观察到的预测方程的决定系数很大，四个波段的范围为0.96-0.99。使用一组独立靶标进行准确度评估。结果表明，经验直线法可以用于此类影像的校正，且校正结果准确。
The empirical line method is an atmospheric correction technique that provides an alternative to radiative transfer modelling approaches. It offers 1 relatively simple means Of surface reflectance calibration. providing that a series of invariant-in-time calibration target measurements are available. This technique has been applied with variable success to both airborne data and coarser spatial resolution satellite sensor data. However, with the advent of higher spatial resolution space-borne sensors there is a need to re-evaluate its potential. The empirical line method was tested for correcting multispectral IKONOS imagery acquired over the tropical island of San Andres, Colombia. The high spatial resolution (4 m) of the data made it possible to identify a number of homogeneous targets with a range of reflectances that were used for the calibration. Coefficients of determination of the prediction equations observed were large, ranging from 0.96-0.99 for each of the four wavebands. An accuracy assessment was performed using a set of independent targets. It demonstrated that the empirical line method can be applied to correct such imagery with accurate results.