The Key Technology Research Of The Airborne Hyperspectral Data Spectrum Reconstruction At Western Mountainous Areas

The main purpose of the hyperspectral image spectrum reconstruction is restoring the feature of spectral information,which help to realize the quantitative description of the spectral data.In this paper,based on the typical geological applications of the western mountains high spectrum reconstruction project,targeting at atmospheric water vapor content inversion precision and terrain correction methods,finally put forward to adapt to the atmospheric water vapor in the mountains of western inversion method and the terrain correction method.The experimental results show that the method can overcome FLAASH correction methods in high altitude area water vapor/owes correction problem,can satisfy the demand of the western region of the typical geological application.In this paper,the main work and results summarized as follows:(1)In this paper,based on the atmospheric radiation transmission model,calculation under different atmospheric model and the ground elevation,under the condition of different minerals,limonite,hematite and goethite,chlorite,etc.)under the condition of underlying surface,820 nm,940 nm,1135 nm,1400 nm and 1800 nm of atmospheric absorption channel absorption characteristics(depth,area)and the statistical relationship between atmospheric water vapor content,according to the statistical correlation of atmospheric water vapor channel selection,establish binary statistical algorithms,eventually build atmospheric water vapor content inversion formula of statistics.(2)Using a lookup table based on channel optimization method,combining with the dem elevation data,design a simple atmospheric moisture inversion system,and experimental verification,test results show that the system method can overcome the FLAASH correction methods in high altitude area water vapor/owes correction problem.(3)The systematic analysis of the influence of terrain factors on the spectrum reconstruction,on the basis of using topographic correction model with the dem elevation data experimental zone for the terrain radiant correction,achieved good effect.(4)The use of research foundation,this paper designed a combination of atmospheric radiation correction and terrain correction comprehensive correction system,the experiment can preliminarily satisfies the requirement of hyperspectral data spectrum reconstruction.