INVERSION OF SYNTHETIC APERTUR,E R,ADAR (SAR) - MSpace ...

6.2 Determination of Geological Structures
Using Radon Transform
6,2.L Introduction
Geological linealnent mapping using r.emote sensing clata has been the most
corlmonly adoptecl technique il geological r.emote sensing applications. Lineameuts
that appeal on a SAR image are usually interpreted visually (Har.r.is
[40]). lnstead of visual detection of lineaneuts, the Radon transform can be
applied to the SAR data with the objective of geologic str.uctule analysis.
The R¿clon tlansforln has been widely used in patteur recognition for
cletecting linear featules fi'orn an image (Illingworth ancl I{ittler [ag]). It has
been also appliecl to problems such as shi¡r wake detection by analyzing SAR
inrages (Rey et al. l9al. Trvo approaches to the Raclon transforrn in geological
remote sensing of SAR data ar.e investigatecl in this chapter incluclilg:
first, geological lineaments analysis, ancl seconcl, cor.relation using the Raclon
tlansfolm to cletelrnine a certain geologic stlucture.
Application of the Radon transfonn for detelrnination of geologic lineaments
is stlaightfortvald. By detecting pixels of relatively lar.ge aurplituile in
the Radon tlansforrn space, celtain gr.oups of linearnents in a SAR image can
be cletemrinecl. This stucly is focused on cleveloping a technique to detelrnine
dominant tlencls of litear¡ents in a test SAR data rather. th¿l detectirrg inclividual
lineaments. A plot of the maximurn aurplitude of Radon tralsfor.nt
versus slope is founcl to l¡e an effective cl.iter.on in icleltifying major.tr.erds of
specific geoìogic sru'face features in the SAR data. An experiuent was car'-
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