TITLE:
Structural Interpretation of Lineaments Uses Satellite Images Processing: A Case Study in North-Eastern Tunisia
AUTHORS:
Sarra Ouerghi Hermi, Ranya Fadlalla Abdalla Elsheikh, Maher Aziz, Samir Bouaziz
KEYWORDS:
Northeast of Tunisia, Landsat-7 ETM + Satellite Data, Directional Sobel Filters, Lineaments, Image Processing
JOURNAL NAME:
Journal of Geographic Information System,
Vol.9 No.4,
August
3,
2017
ABSTRACT:
This paper presents a lineament detection method using multi-band remote
sensing images. The main objective of this work is to design an automatic image
processing tool for lineament mapping from Landsat-7 ETM + satellite
data. Five procedures were involved: 1) The Principal Component Analysis; 2)
image enhancement using histogram equalization technique 3) directional
Sobel filters of the original data; 4) histogram segmentation and 5) binary image
generation. The applied methodology was contributed in identifying several
known large-scale faults in the Northeast of Tunisia. The statistical and
spatial analyses of lineament map indicate a difference of morphological appearance
of lineaments in the satellite image. Indeed, all the lineaments
present a specific organization. Five groups were classified based on three
orientations: NE-SW, E-W and NW-SE. The overlapping of lineament map
with the geologic map confirms that these lineaments of diverse directions can
be identified and recognized on the field as a fault. The identified lineaments
were linked to a deep faults caused by tectonic movements in Tunisia. This
study shows the performance of the satellite image processing in the analysis
and mapping of the accidents in the northern Atlas.