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Cohen-Daubechies-Feauveau wavelet
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Cohen-Daubechies-Feauveau wavelet : ウィキペディア英語版
Cohen-Daubechies-Feauveau wavelet

Cohen-Daubechies-Feauveau wavelet are the historically first family of biorthogonal wavelets, which was made popular by Ingrid Daubechies.〔
〕 These are not the same as the orthogonal Daubechies wavelets, and also not very similar in shape and properties. However their construction idea is the same.
The JPEG 2000 compression standard uses the biorthogonal CDF 5/3 wavelet (also called the LeGall 5/3 wavelet) for lossless compression and a CDF 9/7 wavelet for lossy compression.
==Properties==

* The primal generator is a B-spline if the simple factorization q_{\mathrm{prim}}(X)=1 (see below) is chosen
* The dual generator has the maximum number of smoothness factors which is possible for its length.
* All generators and wavelets in this family are symmetric.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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