• Thumbnail for Short-time Fourier transform
    The short-time Fourier transform (STFT) is a Fourier-related transform used to determine the sinusoidal frequency and phase content of local sections of...
    22 KB (4,055 words) - 09:25, 3 March 2025
  • Thumbnail for Fourier transform
    In mathematics, the Fourier transform (FT) is an integral transform that takes a function as input then outputs another function that describes the extent...
    177 KB (21,313 words) - 14:22, 28 June 2025
  • fractional Fourier transform (FRFT) is a family of linear transformations generalizing the Fourier transform. It can be thought of as the Fourier transform to...
    27 KB (3,937 words) - 02:28, 16 June 2025
  • In mathematics the finite Fourier transform may refer to either another name for discrete-time Fourier transform (DTFT) of a finite-length series.  E.g...
    2 KB (298 words) - 14:04, 23 July 2023
  • sine transform. Hartley transform Short-time Fourier transform (or short-term Fourier transform) (STFT) Rectangular mask short-time Fourier transform Chirplet...
    7 KB (1,001 words) - 15:55, 27 May 2025
  • Thumbnail for Fast Fourier transform
    Fourier transform (FFT) is an algorithm that computes the discrete Fourier transform (DFT) of a sequence, or its inverse (IDFT). A Fourier transform converts...
    67 KB (7,809 words) - 05:39, 1 July 2025
  • Thumbnail for Fourier analysis
    generalizations of the Fourier transform, such as the short-time Fourier transform, the Gabor transform or fractional Fourier transform (FRFT), or can use...
    38 KB (4,788 words) - 15:31, 27 April 2025
  • of such a representation is the windowed Fourier transform (also known as the short-time Fourier transform) which localises the signal by modulating...
    7 KB (928 words) - 09:37, 3 April 2025
  • Fourier-transform spectroscopy (FTS) is a measurement technique whereby spectra are collected based on measurements of the coherence of a radiative source...
    15 KB (1,889 words) - 05:20, 25 May 2025
  • Thumbnail for Gabor transform
    The Gabor transform, named after Dennis Gabor, is a special case of the short-time Fourier transform. It is used to determine the sinusoidal frequency...
    10 KB (1,518 words) - 01:12, 2 July 2025
  • Phase retrieval (category Articles with short description)
    his collaborators (see References). Here we consider 1-D discrete Fourier transform (DFT) phase retrieval problem. The DFT of a complex signal f [ n ]...
    17 KB (2,898 words) - 05:06, 28 May 2025
  • the Fourier transform – and the fact that two-fold Fourier transform reverses direction – can be interpreted by considering the Fourier transform as a...
    22 KB (3,734 words) - 21:42, 19 February 2025
  • transform is a generalization of the short-time Fourier transform (STFT), extending the continuous wavelet transform and overcoming some of its disadvantages...
    13 KB (1,865 words) - 08:28, 21 February 2025
  • In mathematics, the discrete-time Fourier transform (DTFT) is a form of Fourier analysis that is applicable to a sequence of discrete values. The DTFT...
    40 KB (5,076 words) - 15:50, 30 May 2025
  • Thumbnail for Rectangular mask short-time Fourier transform
    mathematics and Fourier analysis, a rectangular mask short-time Fourier transform (rec-STFT) has the simple form of short-time Fourier transform. Other types...
    4 KB (823 words) - 17:59, 18 December 2023
  • Thumbnail for Fourier-transform infrared spectroscopy
    Fourier transform infrared spectroscopy (FTIR) is a technique used to obtain an infrared spectrum of absorption or emission of a solid, liquid, or gas...
    37 KB (4,802 words) - 01:09, 5 June 2025
  • Thumbnail for Wavelet transform
    transform Set partitioning in hierarchical trees Short-time Fourier transform Stationary wavelet transform Time–frequency representation Wavelet Meyer, Yves...
    27 KB (3,836 words) - 08:01, 19 June 2025
  • Thumbnail for Constant-Q transform
    lowest filter, and n is the number of filters per octave. The short-time Fourier transform of x[n] for a frame shifted to sample m is calculated as follows:...
    13 KB (1,680 words) - 05:11, 24 June 2025
  • In mathematics, the discrete Fourier transform over a ring generalizes the discrete Fourier transform (DFT), of a function whose values are commonly complex...
    20 KB (3,992 words) - 20:05, 19 June 2025
  • Thumbnail for Discrete Fourier transform
    same-length sequence of equally-spaced samples of the discrete-time Fourier transform (DTFT), which is a complex-valued function of frequency. The interval...
    76 KB (12,338 words) - 20:01, 27 June 2025
  • Thumbnail for Frequency domain
    data Reciprocal space Short-time Fourier transform Time–frequency representation Time–frequency analysis Wavelet Wavelet transform – digital image processing...
    10 KB (1,193 words) - 21:38, 1 June 2025
  • for such use. Time–frequency analysis is extended from the classic Fourier approach. Short-time Fourier transform (STFT), Gabor transform (GT) and Wigner...
    6 KB (984 words) - 02:01, 29 January 2024
  • Thumbnail for Reassignment method
    Reassignment method (category Transforms)
    technique for sharpening a time-frequency representation (e.g. spectrogram or the short-time Fourier transform) by mapping the data to time-frequency coordinates...
    25 KB (4,004 words) - 00:53, 6 December 2024
  • Thumbnail for Time series
    Dynamic time warping Dynamic Bayesian network Time-frequency analysis techniques: Fast Fourier transform Continuous wavelet transform Short-time Fourier transform...
    43 KB (5,025 words) - 15:47, 14 March 2025
  • other transforms, most notably the Fourier transform and the Mellin transform. Formally, the Laplace transform is converted into a Fourier transform by the...
    75 KB (9,485 words) - 15:35, 1 July 2025
  • Thumbnail for Chirplet transform
    with the time and frequency axes that are typical for waves (Fourier and short-time Fourier transforms) or wavelets. The chirplet transform thus represents...
    10 KB (1,109 words) - 15:57, 17 April 2025
  • which Fourier inversion recovers a function from its Fourier transform Short-time Fourier transform or short-term Fourier transform (STFT), a Fourier transform...
    2 KB (369 words) - 02:23, 12 February 2025
  • the Fourier transform on finite groups is a generalization of the discrete Fourier transform from cyclic to arbitrary finite groups. The Fourier transform...
    13 KB (2,052 words) - 00:36, 8 May 2025
  • Thumbnail for Phase vocoder
    Phase vocoder (category Articles with short description)
    file (typically time expansion/compression and pitch shifting). At the heart of the phase vocoder is the short-time Fourier transform (STFT), typically...
    8 KB (948 words) - 23:36, 30 June 2025
  • converted from time or space domain to the frequency domain usually through use of the Fourier transform. The Fourier transform converts the time or space information...
    27 KB (2,991 words) - 17:50, 26 June 2025