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Discrete wavelet transform
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In numerical analysis and functional analysis, a discrete wavelet transform (DWT) is any wavelet transform for which the wavelets are discretely sampled. As with other wavelet transforms, a key advantage it has over Fourier transforms is temporal resolution: it captures both frequency and location information.
Image with Gaussian noise
Image with Gaussian noise
Image with Gaussian noise removed
Image with Gaussian noise removed
Wavelet transform
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In mathematics, a wavelet series is a representation of a square-integrable function by a certain orthonormal series generated by a wavelet. This article provides a formal, mathematical definition of an orthonormal wavelet and of the integral wavelet transform.
Image: Basis function with compression factor
Image: Basis function with compression factor
Image: STFT and WT
Image: STFT and WT
Image: Analysis of three superposed sinusoidal signals
Image: Analysis of three superposed sinusoidal signals