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Jean Morlet (French: [ʒɑ̃ mɔʁlɛ]; 13 January 1931 – 27 April 2007) was a French geophysicist who pioneered work in the field of wavelet analysis around the year 1975. He invented the term wavelet to describe the functions he was using. In 1981, Morlet worked with Alex Grossmann to develop what is now known as the Wavelet transform.
The Haar wavelet. In mathematics, the Haar wavelet is a sequence of rescaled "square-shaped" functions which together form a wavelet family or basis. Wavelet analysis is similar to Fourier analysis in that it allows a target function over an interval to be represented in terms of an orthonormal basis. The Haar sequence is now recognised as the ...
The wavelets forming a continuous wavelet transform (CWT) are subject to the uncertainty principle of Fourier analysis respective sampling theory: [4] given a signal with some event in it, one cannot assign simultaneously an exact time and frequency response scale to that event. The product of the uncertainties of time and frequency response ...
M. Unser, Ten Good Reasons for Using Spline Wavelets, Proc. SPIE, Vol.3169, Wavelets Applications in Signal and Image Processing, 1997, pp. 422–431. This mathematical analysis –related article is a stub .
The Discrete Wavelet Transform (DWT) is a pivotal algorithm in multiresolution analysis, offering a multiscale representation of signals through decomposition into different frequency sub-bands. Key features of DWT:
The wavelets generated by the separable DWT procedure are highly shift variant. A small shift in the input signal changes the wavelet coefficients to a large extent. Also, these wavelets are almost equal in their magnitude in all directions and thus do not reflect the orientation or directivity that could be present in the multidimensional signal.
An introduction to wavelets for non-academics; More diagrams - its hard to see what wavelet analysis is when just formulas are given (I strongly second this. --Ninjagecko. One should add visuals which show how a mother wavelet is used as a template for constructing a signal, since the the "window/frame" discussion is ambiguous.
The theory of wavelets studies particular bases of function spaces, with a view to applications; they are a key tool in time–frequency analysis. Subcategories This category has the following 3 subcategories, out of 3 total.
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