EFDAttrib
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This attribute plugin for the open source seismic interpretation platform OpendTect Version 6.0.0 or later performs spectral (time-frequency) decomposition using empirical fourier decomposition.
Description
This plugin can be used as an alternative to the OpendTect FFT spectral decomposition attribute.
It does spectral decomposition using Empirical Fourier Decomposition (Zhou etal(2019). The plugin provides 2 new attributes that generate the mode decomposition and a spectral decomposition from the mode decomposition. These provide a signal analysis akin to Empirical Mode Decomposition. These attributes can work quite well for a simple mixture of frequency chirps but appear to be less useful for typical seismic data.
Empirical Fourier Mode/Spectral Decomposition
Input Parameters
EFD Modes
This attribute has 3 parameters:
| NAME | DESCRIPTION |
|---|---|
| Input Data | The attribute volume to be analysed. |
| Number of Modes | The number of modes expected. |
| Output Mode | The mode to output. |
EFD Modes input parameter dialog
The “Display EFD Modes panel” button will generate the attribute for a trace in the input data volume.
EFD Spectral Decomposition
This attribute has 4 parameters:
| NAME | DESCRIPTION |
|---|---|
| Input Data | The attribute volume to be analysed. |
| Number of Modes | The number of modes expected. |
| Output Frequency (Hz) | The frequency to output. |
| Output Frequency Step (Hz) | The frequency step for output. |
EFD Spectral Decomposition input parameter dialog
The “Display Time/Frequency panel” button will generate the attribute for a trace in the input data volume.
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