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SISTEMA INTEGRAL DE INFORMACIÓN ACADÉMICA - PÚBLICO
Título del libro: Proceedings Of The 15th International Conference On Ground Penetrating Radar, Gpr 2014 Título del capítulo: Multiresolution analysis based on Mallat pyramidal algorithm applied to OPR data
Autores UNAM: DORA CELIA CARREON FREYRE;
Autores externos: Idioma: InglésAño de publicación: 2014Palabras clave:
The implementation of the Pyramidal Mallat algorithm to GPR data,
according to the analysis of its transient nature, is proposed. This is
a decomposition method of the discrete wavelet transform which
introduces a variable and scalable wavelet length, with compact support
and limited band in the frequency domain. CPR data were analyzed in a
time-frequency plane and are synthesized at different levels of
resolution through octaves of frequency allowing noise removal[7].
This technique allows the improvement of radargrams in urban areas since
the characteristic noise mask the main reflectors. In those cases the
application of the Discrete Fourier Transform, designed for data
analysis in which the frequency does not vary with time, is limited.
Discrete Wavelet Transform is an alternative tool for analysis of
transient data because it determines that time corresponds to each
frequency component and also allows to reconstruct the data in a
sequence of successive approximation spaces, such as orthogonal
subspaces. The binding of them define L-2(R) and each orthogonal
projection represents a level of data resolution. In this paper the
results obtained for different types of wavelets from the Daubechies
family are presented.
Entidades citadas de la UNAM:
Fuente:
ISBN: 9781479967896 Editorial: Institute of Electrical and Electronics Engineers Inc.
