摘要
地物波谱信息是多光谱遥感的基础，光谱信息所具有的特征反映了地物本身的存在、变化和差异。作为花岗岩岩石物理特性研究的一部分，笔者选择了广东早古生代两类花岗岩为研究对象．测定并分析了两类花岗岩及其围岩的反射光谱特征。并且依据它们光谱特性的差异．确定了遥感图象处理的技术和方法。为下一步该地区遥感图象识别花岗岩奠定了基础。
Spectral informaton of surface object is the base of multispectral remote sensing.Characteristics of spectral information reflect the existence, change and difference of the objects. As a part of the research of physical properties of granite,we analyze the reflective spectral features of two types of Early paleozoic granite in Guangdong province.The samples of the I--type granite are from longtang rock mass in central Guangdong and the S--type granite from Yunkai mountain in western Guangdong province. Through PIS-B high accurate instantaneous spectrometer, the reflecive spectral properties of two granites were obtained. The brightness difference between the two granites is very high. Spectral reflectance of S-type granite is greater than that of l--type granite.Furthermore,the differences of field reflective spectral propertics between two granites and between the granites and surrounding rocks are analyzed, which provided a theoretical basis on which different type of rocks can be discriminated in the remote sensing images. In consequence, the techniques and methods to dispose the remote sensing images are also designed on the basis of known differences of spectral properties. Among the several possible designs,an ideal one is to composite the images of TM4(R ),TM4/3(G) and TM2/l (B). On the composite images, two granites and the surrounding rocks can be easily discriminated.
出处
《高校地质学报》
CAS
CSCD
1997年第4期445-450,共6页
Geological Journal of China Universities
基金
国家教委博士点基金!96033534
浙江大学曹光彪高科技发展基金
关键词
广东
花岗岩
反射光谱
遥感
granite, reflective spectrum, remote sensing,Guangdong
