Function wavelet_decompose 

pub fn wavelet_decompose<T>(
    image: &ArrayBase<ViewRepr<&T>, Dim<[usize; 2]>>,
    wavelet: &WaveletFilter<T>,
    levels: usize,
    mode: BorderMode,
) -> Result<WaveletDecomposition<T>, NdimageError>
where
    T: Float + FromPrimitive + Debug + Clone + Send + Sync + 'static,

Multi-level wavelet decomposition

Performs a multi-level discrete wavelet transform, producing a pyramid of coefficients at different scales and orientations.