wavelet algorithm

См. также в других словарях:

• Wavelet packet decomposition — (WPD) (sometimes known as just wavelet packets) is a wavelet transform where the signal is passed through more filters than the DWT. In the DWT, each level is calculated by passing the previous approximation coefficients through a high and low… …   Wikipedia

• Wavelet — A wavelet is a mathematical function used to divide a given function or continuous time signal into different frequency components and study each component with a resolution that matches its scale. A wavelet transform is the representation of a… …   Wikipedia

• Wavelet transform — An example of the 2D discrete wavelet transform that is used in JPEG2000. In mathematics, a wavelet series is a representation of a square integrable (real or complex valued) function by a certain orthonormal series generated by a wavelet …   Wikipedia

• Wavelet Scalar Quantization — The Wavelet Scalar Quantization algorithm (WSQ) is a compression algorithm used for gray scale fingerprint images. It is based on wavelet theory and has become a standard for the exchange and storage of fingerprint images. WSQ was developed by… …   Wikipedia

• Stationary wavelet transform — Haar Stationary Wavelet Transform of Lena The Stationary wavelet transform (SWT)[1] is a wavelet transform algorithm designed to overcome the lack of translation invariance of the discrete wavelet transform (DWT). Translation invariance is… …   Wikipedia

• Cascade algorithm — The cascade algorithm is a numerical method for calculating the basic scaling function or wavelets using an iterative algorithm, which computes wavelet coefficients at one scale from those at another. Because it applies the same operation over… …   Wikipedia

• Daubechies wavelet — Daubechies 20 2 d wavelet (Wavelet Fn X Scaling Fn) Named after Ingrid Daubechies, the Daubechies wavelets are a family of orthogonal wavelets defining a discrete wavelet transform and characterized by a maximal number of vanishing moments for… …   Wikipedia

• Discrete wavelet transform — An example of the 2D discrete wavelet transform that is used in JPEG2000. The original image is high pass filtered, yielding the three large images, each describing local changes in brightness (details) in the original image. It is then low pass… …   Wikipedia

• Embedded Zerotrees of Wavelet transforms — EZW (Embedded Zerotrees of Wavelet Transforms) is a lossy image compression algorithm. At low bit rates(i.e. high compression ratios) most of the coefficients produced by a subband transform (such as the wavelet transform)will be zero, or very… …   Wikipedia

• Stationäre Wavelet-Transformation — der Lena unter Verwendung des Haar Wavelets Die stationäre Wavelet Transformation (SWT)[1] ist ein Wavelet Transformationsalgorithmus, der die fehlende Verschiebungsinvarianz der diskreten Wavelet Transformation (DWT) be …   Deutsch Wikipedia

• Legendre wavelet — Legendre wavelets: spherical harmonic wavelets = Compactly supported wavelets derived from Legendre polynomials are termed spherical harmonic or Legendre wavelets [1] . Legendre functions have widespread applications in which spherical coordinate …   Wikipedia