Wavelet denoising of magnetic prospecting data
Gregory N. Tsokas
January 2005; accepted 7 March 2005)
of Exploration Geophysics, Department of Geophysics, School of Geology,
Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
+2310 998507, Fax: +2310 998528, email: firstname.lastname@example.org
ABSTRACT: A denoising scheme is
presented suitable for magnetic exploration data. It is based on an empirical
study and combines the shift invariant denoising
method with the use of a variable threshold, which is calculated in each cycle
of the shift invariant algorithm. The calculation of each threshold is based on
the wavelet transformation of random noise with the same standard deviation as
in the data. The scheme is particularly useful in “archaeological geophysics”
where it is important to produce results that mostly resemble the plane view of
the buried objects.