transform
A module for applying transformation to Patches.
Transforms are defined as
Functions
| Name | Description |
|---|---|
| dft | Perform the discrete Fourier transform (dft) on specified dimension(s). |
| differentiate | Calculate first derivative along dimension(s) using central differences. |
| dispersion_phase_shift | Compute dispersion images using the phase-shift method. |
| envelope | Calculate the envelope of a signal using the Hilbert transform. |
| fbe | Compute the rolling Frequency Band Energy in a window. |
| hilbert | Perform a Hilbert transform on a patch. |
| idft | Perform the inverse discrete Fourier transform (idft) on specified dimension(s). |
| integrate | Integrate along a specified dimension using composite trapezoidal rule. |
| istft | Invert a short-time fourier transform. |
| kurtosis | Compute kurtosis along a patch dimension. |
| median_frequency | Compute the median frequency of a Fourier-domain patch. |
| phase_weighted_stack | Apply phase weighted stacking to enhance coherent signals. |
| radians_to_strain | Convert data in radians to strain (rate). |
| spectral_centroid | Compute the spectral centroid of a Fourier-domain patch. |
| spectral_entropy | Compute spectral entropy from a Fourier-domain patch. |
| spectral_flatness | Compute spectral flatness from a Fourier-domain patch. |
| spectral_kurtosis | Compute spectral kurtosis from a Fourier-domain patch. |
| spectral_peak_amplitude | Compute the peak spectral amplitude of a Fourier-domain patch. |
| spectral_peak_frequency | Compute the peak frequency of a Fourier-domain patch. |
| stalta | Compute the short-term / long-term average (STA/LTA) ratio along a patch dimension. |
| stft | Perform a short-time fourier transform. |
| tau_p | Compute linear tau-p transform. |
| velocity_to_strain_rate | Convert velocity DAS data to strain rate using central differences. |
| velocity_to_strain_rate_edgeless | Estimate strain-rate using central differences. |
Classes
| Name | Description |
|---|---|
| Envelope | Calculate the envelope of a signal using the Hilbert transform. |
| Hilbert | Perform a Hilbert transform on a patch. |
| Kurtosis | Compute kurtosis along a patch dimension. |
| RadiansToStrain | Convert data in radians to strain (rate). |
Modules
| Name | Description |
|---|---|
| dispersion | Dispersion computation using the phase-shift (Park et al., 1999) method. |
| fourier | Module for Fourier transforms. |
| spectral_descriptors | Spectral descriptor transforms for DASCore patches. |
| strain | Transformations related to strain. |
| taup | Tau-p Patch transforms. |
| _kurtosis_kernels | Numba kernels for the kurtosis transform. |
| stalta | Patch function for ‘short-term average’ to ‘long-term average’ ratio transform |
| hilbert | Patch functions based on the Hilbert transform. |
| differentiate | Module for performing differentiation on patches. |
| fbe | Patch function for ‘Frequency-Band Energy’ transform |
| kurtosis | Patch function for kurtosis transform |
| _taup_kernels | Numba kernels for the tau-p transform. |
| integrate | Module for performing integration on patches. |