成像光谱遥感技术及其图像光谱信息提取的分析研究

A study on Imaging Spectrometry and Its Extraction of Image Spectral Information

成像光谱技术是80年代发展起来的最新遥感方法。本文对其原理、理论基础及图像光谱信息提取的方法进行了探讨,并在红外细分光谱(FIMS)金矿蚀变带信息提取分析研究的基础上,通过对可见光细分19波段AMSS、澳大利亚的24波段GEOSCAN、MKII AMSS及美国GER64通道成像光谱数据的初步处理,发展和形成了一些针对超多波段成像光谱数据的图像处理和分析及光谱信息提取的方法。 成像光谱信息提取的方法,主要包括图像光谱反射率转换技术、图像光谱曲线显示、光谱特征参数测度(光谱吸收特征的波长位置、宽度、深度)、图像地物光谱曲线与地物光谱数据库的信息匹配以及地物光谱识别专家系统。本文以红外细分光谱图像在金矿蚀变带信息提取分析中的应用为例,讨论了成像光谱图像的一种处理分析技术及其发展前景。

In the 1980's a new type of remote sensing technology, so called imaging spectrometry,. had developed. In this paper, the concept of imaging spectrometry, its theoretical basis and analytical methods of extraction for spectral information have been discussed. Based upon extraction of spectral information for the gold-bearing alteration zone by Fine-split Infrared Multi-spectral Scanner (FIMS), and data-processing of the 19-Band AMSS, Geoscan MKII AMSS and GER 64-Bahd imaging spectrometer, some methods of data-processing and analysing of Imaging Spectrometers Information had been tested and developed.The procedures are approximately included as follows: (1) Transformation of raw image to reflectance one; (2) Displaying of imaging spectral curves of imaging spectrometer; (3) The parameter-measuring of spectral absorption band; (4) The algorithm-matching spectra for a library of lab. spectra with spectra-extracted from the imaging spectrometers data each other, ect.