LEFA SOFTWARE: AN AUTOMATIZED STRUCTURAL ANALYSIS OF REMOTE SENSING IMAGERY IN MATLAB ENVIRONMENT

Abstract

Structural analysis of space images is used as the base foundation for organizing regional geological search and prospecting works on affordable factual base. however, there is a lacking of open source software for research and educational applications. in order to fill this gap lEFA (lineament Extraction and Fracture Analysis) software has been offered. this software runs in Matlab environment and has the algorithms for lineament analysis and fault detecting, calculation of fractal dimension, fracture density and output of both vector and raster data in georeferenced formats. Given paper describes software interface, its features, methodologies to be used and approach to data analysis of fracture tectonics of sikhote-Alin folded belt south (Russian Far East). Research area includes polygenic terrane collage intruded by Meso-cenozoic complexes, unconformable overlapped by volcanic-sedimentary cover. there are deep-seated faults traced by mélange zones, sinistral strike-slip faults of northeastern strike, gentle-sloped thrust in northwestern direction, near-slip structures of contraction and tension as well as ring fractures of magmatic uplifts and calderas. tectonomagmatic complexes are associated with the numerous ore and precious metals deposits and manifestations. in view of low passability of sikhote-Alin due to its taiga forestation and thick soil layer, planning of regional search and prospection works is supported by results of space image analysis. it makes possible to concentrate filed surveying on the most prospective areas. correlation between automatically detected image elements and their density map with known sikhote-Alin folded belt structures is also considered.

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  
  
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
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1Дальневосточный геологический институт ДВО РАН, Владивосток, e-mail: shevirev@mail.ru;
2Дальневосточный федеральный университет, Владивосток
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

1Far East Geological institute, FEB RAS, Vladivostok, e-mail: shevirev@mail.ru;
2Far Eastern Federal University, FEFU, Vladivostok
  




           





                 

     




   
   


    
     
   
   
   
   
   

    


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  
  




   
  
    
   
     
  



   
     

  
   
    


   
    
    
 
   

  
     



   
    
   
     
   
    
   
  


  
    

   

   

  
   
   
   


    



Организация пользовательского интер-
фейса.   
 
     
     
    
     
  

     
    
     
    




   
    

    
     
    
     

     

    
    

   



   
     
     

    
  
    
     

 
  
  
     
   

    
   

    





  
  
   

    
    
   
   

   

   
     
    
    
   
  
      
   


    





    
   
    
   
   k/b
   
    
   
   
    


    


  



     

  

   

Рис. 1. Оконный интерфейс программы LEFA. Функциональные области: 1 – файловых операций;
2 – окно просмотра изображения; 3 – предварительной обработки (фильтрации изображения);
4 – анализа линейных элементов по методу Хафа; 5 – объединения выделенных элементарных
линейных элементов в «линеаменты»; 6 – области создания аналитических изображений:
полигонального покрытия с значениями фрактальной размерности Минковского, растровой
карты плотности линейных элементов и розы-диаграммы направлений линейных элементов;
7 – статистика распознанных элементов


  
  


   
   
  
   

   
   
    
   
     
    
   
   


Сравнение программы с имеющимися
аналогами.   
    
  
   
    


   

  
    
    


   
    
      
    

   
   


    




    

  


     
    
    
  

   

   


   




 

 




   
  
  

   
  
   
   
   
   



   
   
    

   
   
   
   
   
   
   
   


  
  
   
    
   
   
    
 
   


  
  

  



Рис. 2. Схема геологического строения участка Сихотэ-Алинского супертеррейна
Рис. 3. a) Исходные данные SRTM для экспресс-дешифрирования
территории САТ в пределах Приморского края (ресемплирование 0.1);
б) Результат автоматизированной обработки данных SRTM в программе LEFA


  
  




    

    
    

    
  
   
     
  
   
     


   
   


   
  
  

   
     
  
    
    
  
   


  


  


   
  


      
   

  

  
     


         

   
    

      


       



    


 

