Research On Quantitative Interpretation Methods And Influencing Factors Of Linear Structure Of Remote Sensing Images

Quantitative interpretation analysis of linear structure of remote sensing is used as a common method of geological structure analysis because of its comprehensive rapidity,economic practicability,and intuitive descriptive characteristics of quantitative analysis results.However,in practical application,it is found that the interpretation results of linear structures of remote sensing images in different periods are different,which leads to differences in the results of related quantitative analysis.In this regard,this article takes the Daxinganling Tayuan area,which is rich in mineral resources and has obvious seasonal changes in vegetation,as an example,and selects spring(April 15,2014),summer(June 02,2014),and autumn(2016 09 September27),Winter(December 27,2014)Linear landscape interpretation of four scenes Landsat-8 OLI remote sensing images at different times and phases,and related quantitative analysis.Combined with vegetation coverage,solar azimuth angle and solar altitude angle,DEM data terrain factors and other factors to analyze the difference between the quantitative interpretation results,to obtain the influencing factors of the quantitative interpretation analysis difference of the linear structure of the remote sensing image in different time phase It can provide a certain reference significance for the analysis of remote sensing geological structure in this area and the selection of reasonable remote sensing image data.The main research content and results of the paper are as follows:1.Based on the preprocessing of the image,combined with the linear structure interpretation flag,extract the linear structure information of Lansat-8 OLI image in different phases in the study area,count the number,length and azimuth characteristics,and verify by length-frequency analysis It satisfies the probability distribution characteristics of random events in probability theory;through radar chart,linear structure density and space frequency map,average azimuth angle,and average length analysis,it is understood that the linear structures in the area are generally NE,NW,and near NS and EW The spatial distribution characteristics are also relatively more developed;the analysis results such as distortion index,goodness degree andlocal anomalies of linear structure are in good agreement with the spatial position of known deposits(points)in the area,verifying that the quantitative interpretation method used in geology Desirability in prospecting work.2.According to the results of quantitative interpretation analysis of linear structure,it was found that the interpretation degree of linear structure decreased sequentially in April,December and September,and the interpretation degree was the lowest in June.The surface vegetation coverage,solar azimuth and Influencing factors such as the solar altitude angle and topography should be selected as low as possible during the period of vegetation coverage in the area,and according to the terrain change characteristics of the study area,a reasonable solar azimuth angle and solar altitude angle image should be selected for quantitative interpretation of linear structure,That is,the image of low vegetation coverage and high solar altitude angle.3.The interpretation of the image structure in April is good,and the structure interpretation in April can be used later.