TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

FOURIER TRANSFORM ALGORITHM [5 records]

Record 1 2019-07-10

English

Subject field(s)
  • Mathematics
  • Magnetic Resonance Imaging
CONT

Processing of MRI data is usually performed in an array processor using the Fast Fourier Transform(FFT) algorithm. These computational requirements generally require the input data to be in a matrix whose dimensions are a power of 2, such as 128x128, 256x256, or 512x512. If the acquired k-space data does not complete this matrix, it is customary to fill in the missing cells with zeroes, a technique called zero padding, zero filling, or zero-interpolation filling(ZIP).

French

Domaine(s)
  • Mathématiques
  • Imagerie par résonance magnétique
DEF

Remplissage des lignes ou des portions non utilisées du plan de Fourier par des zéros [...]

Spanish

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Record 2 2007-12-14

English

Subject field(s)
  • Facilities and Instruments (Astronomy)
  • Remote Sensing
CONT

The interest of a ground based Slit Aperture Telescope(SAT) which operates with a long thin pupil has been underlined for applications in the field of high angular resolution observations by speckle-interferometric techniques. The SAT lies halfway between the Michelson stellar interferometer and the standard telescope with circular aperture. The authors present the principle of an image processing algorithm which could be used associated with a space-SAT for astronomical image reconstruction. A full coverage of the two dimensional Fourier plane of the astronomical object can be obtained by rotating the SAT around its optical axis. The method of image reconstruction is analogous to those used in computerized tomography and uses Fast Fourier Transform algorithm. The interest of the use of a rotating space-SAT among synthetic apertures is its capability of giving a reconstructed image of the astronomical object simultaneously in several light wavelengths, each colored image being comparable with the others for fruitful astrophysical applications.

French

Domaine(s)
  • Installations et instruments (Astronomie)
  • Télédétection
CONT

Le télescope à pupille fente fournit des images unidimensionnelles et opère en synthèse d'ouverture. En l'absence de turbulence atmosphérique, l'image focale fournie par un télescope à pupille fente est quasiment une projection unidimensionnelle de l'objet observé. Après une rotation complète autour de son axe optique, on obtient un ensemble de projections de l'objet observé qui n'est autre que la transformée de Radon de l'objet.

Spanish

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Record 3 2003-11-26

English

Subject field(s)
  • Computer Mathematics
  • Video Technology
  • Audiovisual Techniques and Equipment
DEF

A video compression algorithm similar to Fast Fourier Transform(FFT) but easier to compute.

OBS

The Dictionary of New Media (source code: MODIN) is available at: <a href="http://hepdigital.com/" title="http://hepdigital.com">http://hepdigital.com</a>.

French

Domaine(s)
  • Mathématiques informatiques
  • Vidéotechnique
  • Audiovisuel (techniques et équipement)
DEF

Algorithme de compression vidéo ressemblant à la transformation de Fourier rapide mais qui est plus facile à calculer.

Spanish

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Record 4 1989-09-07

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Computer Programs and Programming

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Programmes et programmation (Informatique)

Spanish

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Record 5 1986-10-17

English

Subject field(s)
  • Artificial Intelligence
  • Computer Programs and Programming

French

Domaine(s)
  • Intelligence artificielle
  • Programmes et programmation (Informatique)

Spanish

Save record 5

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