Applied Research On Worldview-2 Lithological Interpretation Of West Kunlun Mountains

Rely on the project of of Remote Sensing Geological Survey in West Kunlun Metallogenic Belt,We study the application methods of remote sensing lithological interpretation by WorldView-2 data.On the basis of in-depth analysis of the characteristics of the WorldView-2 data,We carried out the experiment data preprocessing method research and the application analysis of remote sensing information enhancement common method,According to the difference of adjacent lithology put forward a kind of lithology tonal difference enhance method,and established WorldView-2 lithology information enhancement method system,which had been applied in the remote sensing lithology interpretation of KEZILE area.The main results are as follows:(1)By In-depth analysis of the WorldView-2 data in the spectral bands,the spatial resolution and radiance resolution,we think that WorldView-2 data has rich information and great potential in geological applications,and we determined applicable preprocessing methods of WorldView-2 data by some experiments,including:FLAASH atmosphere correction method,correction method based on a rational function model and the IRS-P5 DEM and Pansharp fusion method.(2)Make a research of lithology information enhancement method of WorldView-2 data,which including:methods based on the spectral characteristics(band combination,contrast enhancement,ratio transformation,principal component transformation,transform HLS transform),methods based on the space characteristics(spatial filtering,data fusion)and methods based on the landform and vegetation characteristics(3 d display and he method),achieved good effect.(3)According to the characteristics of remote sensing lithology interpretation,we put forward a method of enhancing the lithologic tonal difference based on the spectrum characteristics,that is,from HLS chroma space,analyse and calculate the hue diversity and saturation of image color synthesis adjacent lithology,with the methods of ratio transformation and principal component transformation,which can highlight the best color tone differences lithology synthetic images,and solve the adjacent lithology no obvious difference.(4)Based on the above research of method,we established the system of WorldView-2 lithology information enhancement method,and make an example research in KEZILE area of West Kunlun,in combination with regional geological background of remote sensing lithology interpretation,which we find out the region distribution of lithology and obtained a good application effect.