Seislet transform and seislet frame |

To analyze 2-D data, one can apply 1-D seislet frame in the distance direction after the Fourier transform in time (the - domain). In this case, different frame frequencies correspond to different plane-wave slopes (Canales, 1984). We use a simple plane-wave synthetic model to verify this observation (Figure 15a). The - plane is shown in Figure 15b. We find a prediction-error-filter (PEF) in each frequency slice and detect its roots to select appropriate spatial frequencies. We use Burg's algorithm for PEF estimation (Claerbout, 1976; Burg, 1975) and an eigenvalue-based algorithm for root finding (Edelman and Murakami, 1995). The seislet coefficients and the corresponding recovered plane-wave components are shown in Figure 16. Similarly to the 1-D example, information from different plane-waves gets strongly compressed in the transform domain.

plane,fft
Synthetic plane-wave data
(a) and corresponding Fourier transform along the time direction (b).
Figure 15. |
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plane1,plane2,plane3
Seislet
coefficients (left) and corresponding recovered plane-wave
components (right) for three different parts of the 1-D
seislet frame in the - domain.
Figure 16. |
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Seislet transform and seislet frame |

2013-07-26