Resumo

GONZALEZ-FLORES, Ernesto; CAMPOS-ENRIQUEZ, José Oscar; CAMACHO-RAMIREZ, Erick  e  RIVERA-RECILLAS, David Ernesto. Eliminated aliasing effect on wavelet transform based multiresolution analysis. Geofís. Intl [online]. 2016, vol.55, n.3, pp.189-198. ISSN 2954-436X.  https://doi.org/10.19155/rgi20165531611.

Multiresolution analysis, based on the discrete wavelet transform, is here incorporated in seismic signal processing. This analysis technique enables decomposing a seismic signal, in different frequency bands, and thus to analyze the information contained in these frequency bands. Multiresolution analysis allows visualizing in the time domain the information contained in the frequency bands. Wavelets commonly used in the discrete wavelet transform present an overlay between scales, this constitutes an aliasing effect that gives rise to spurious effects. Vaidyanathan wavelet minimizes the overlay between scales. We applied this wavelet to synthetic data and to a 3D seismic cube. Accordingly, spurious effects from aliasing generated by overlay between scales are minimized with the Vaidyanathan wavelet.

Palavras-chave : multiresolution analysis; spectral decomposition; discrete wavelet transform.

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