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Remote Sens. 2014, 6(11), 11468-11493; doi:10.3390/rs61111468

TecLines: A MATLAB-Based Toolbox for Tectonic Lineament Analysis from Satellite Images and DEMs, Part 2: Line Segments Linking and Merging

1
Remote Sensing Group, Institute of Geology, TU Bergakademie Freiberg (TUBAF), Bernhard-von-Cotta-Str. 2, Freiberg (Sachsen) 09599, Germany
2
Remote Sensing Group, Helmholtz Institute Freiberg of Resource Technology, Halsbruecker Str. 34, Freiberg (Sachsen) 09599, Germany
*
Author to whom correspondence should be addressed.
Received: 14 May 2014 / Revised: 11 September 2014 / Accepted: 29 October 2014 / Published: 18 November 2014
(This article belongs to the Special Issue Remote Sensing in Geomorphology)
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Abstract

Extraction and interpretation of tectonic lineaments is one of the routines for mapping large areas using remote sensing data. However, this is a subjective and time-consuming process. It is difficult to choose an optimal lineament extraction method in order to reduce subjectivity and obtain vectors similar to what an analyst would manually extract. The objective of this study is the implementation, evaluation and comparison of Hough transform, segment merging and polynomial fitting methods towards automated tectonic lineament mapping. For this purpose we developed a new MATLAB-based toolbox (TecLines). The proposed toolbox capabilities were validated using a synthetic Digital Elevation Model (DEM) and tested along in the Andarab fault zone (Afghanistan) where specific fault structures are known. In this study, we used filters in both frequency and spatial domains and the tensor voting framework to produce binary edge maps. We used the Hough transform to extract linear image discontinuities. We used B-spline as a polynomial curve fitting method to eliminate artificial line segments that are out of interest and to link discontinuous segments with similar trends. We performed statistical analyses in order to compare the final image discontinuities maps with existing references map. View Full-Text
Keywords: MATLAB; synthetic dataset; QuickBird2; image discontinuity; edge linking; hough transform; polynomial interpolation; tavares-phadilha; B-spline; statistical analysis MATLAB; synthetic dataset; QuickBird2; image discontinuity; edge linking; hough transform; polynomial interpolation; tavares-phadilha; B-spline; statistical analysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Rahnama, M.; Gloaguen, R. TecLines: A MATLAB-Based Toolbox for Tectonic Lineament Analysis from Satellite Images and DEMs, Part 2: Line Segments Linking and Merging. Remote Sens. 2014, 6, 11468-11493.

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