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WaveletDenoising

oxiphysics_core::wavelets

Struct WaveletDenoising 

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pub struct WaveletDenoising;
Expand description

Wavelet-domain signal denoising methods.

Provides hard and soft thresholding, and common threshold selection rules including VisuShrink (universal) and SureShrink (SURE).

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impl WaveletDenoising

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pub fn hard_threshold(coeffs: &mut Vec<f64>, threshold: f64)

Hard thresholding: set coefficients with absolute value below threshold to zero.

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pub fn soft_threshold(coeffs: &mut Vec<f64>, threshold: f64)

Soft thresholding: shrink coefficients toward zero by threshold.

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pub fn universal_threshold(signal: &[f64]) -> f64

Universal (VisuShrink) threshold: σ √(2 ln N).

Estimates noise σ from the median absolute deviation of the detail coefficients.

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pub fn sure_threshold(signal: &[f64]) -> f64

SURE (Stein’s Unbiased Risk Estimator) threshold.

Selects the threshold that minimizes the SURE risk estimate.

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pub fn denoise_signal(signal: &[f64]) -> Vec<f64>

Apply full denoising pipeline: DWT → threshold → IDWT.

Decomposes the signal using the Haar DWT, applies soft thresholding with the universal threshold, and reconstructs.

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