Σύγκριση μεθόδων

	Διακριτή Μετασχηματισμός Κυματιδίων	MODWT
Πεδίο	Χρονοσειρές	Χρονοσειρές
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	1992	1995
Δημιουργός	Ingrid Daubechies	Donald B. Percival
Τύπος	Hierarchical signal decomposition	Non-decimated multiresolution decomposition
Θεμελιώδης πηγή	Daubechies, I. (1992). Ten Lectures on Wavelets. SIAM.	Percival, D. B., & Walden, A. T. (1995). Wavelet Methods for Time Series Analysis. Cambridge University Press.
Εναλλακτικές ονομασίες	DWT, Daubechies wavelets, Haar wavelet	MODWT, Stationary wavelet transform, Undecimated DWT
Συναφείς	1	2
Σύνοψη	The discrete wavelet transform (DWT) is a fast, computationally efficient method for decomposing signals into different frequency and time components using orthogonal or biorthogonal wavelet functions. Developed rigorously by Ingrid Daubechies (1992) and built on Mallat's multiresolution decomposition theory (1989), the DWT employs filter banks to recursively split a signal into approximation (low-frequency) and detail (high-frequency) components. It has become the foundation for signal processing applications ranging from compression to feature extraction.	The maximal overlap discrete wavelet transform (MODWT) is a translation-invariant wavelet decomposition method that addresses a key limitation of the standard DWT: lack of shift invariance. Introduced by Percival and Walden (1995), MODWT applies the same wavelet filters at each scale without downsampling, producing an undecimated decomposition. Each detail and approximation coefficient array maintains the full length of the input signal, enabling both robust multi-scale analysis and translation-invariant feature extraction.