TERMIUM Plus®

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NUMERICAL FILTERING [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2004-10-15

English

Subject field(s)
  • Meteorological Forecasting, Data Measurement and Analysis
  • Modelling (Mathematics)
DEF

A numerical model in which there is no removal(filtering) of the high-frequency physical mechanisms(sound and gravity waves) giving rise to computational instability.

French

Domaine(s)
  • Prévisions météorologiques et mesure et analyse des données
  • Modélisation (Mathématique)
DEF

Modèle numérique dont on n'a pas éliminé (par filtrage) les mécanismes physiques de haute fréquence (ondes acoustiques et de gravité), ce qui cause de l'instabilité dans les calculs.

Spanish

Campo(s) temático(s)
  • Previsiones meteorológicas, medición y análisis de datos
  • Modelización (Matemáticas)
DEF

Modelo numérico en el que no hay eliminación (filtración) de los mecanismos físicos de alta frecuencia (ondas acústicas y de gravedad) que acusan la inestabilidad en los cálculos.

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Record 2 2002-03-15

English

Subject field(s)
  • Remote Sensing
DEF

In analysis, the removal of certain spectral or spatial frequencies to highlight features in the remaining image.

CONT

Filtering is an operation designed to improve image readability and/or to extract certain information from them. The principle of the various filters is to modify the numerical value of each pixel as a function of the neighbouring pixel values. For example, if the value of each pixel is replaced by the average of its value and those of its eight neighbours the image is smoothed, that is to say, the finer details disappear and the image appears fuzzier. In "mobile window filtering" the programme computes for a given pixel the sum of the products of the neighbouring pixel values multiplied by coefficients given in a table of coefficients, then repeats the operation for the next pixel and so on.

OBS

filtering: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

French

Domaine(s)
  • Télédétection
DEF

En analyse des données, élimination de certaines fréquences spectrales ou spatiales qui permettent d'accentuer des caractéristiques spécifiques d'images.

CONT

[...] le filtrage de l'image consiste à recalculer la valeur de chaque pixel en analysant les radiométries sur un voisinage, par exemple, pour lisser l'image ou au contraire pour accentuer les contrastes.

OBS

filtrage : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

PHR

Filtrage adapté.

Spanish

Save record 2

Record 3 1989-08-31

English

Subject field(s)
  • Computer Graphics
CONT

Two-dimensional numerical convolution is performed with the effect of selectively filtering the image to improve its subjective quality, compensating for information lost while in the video medium.

French

Domaine(s)
  • Infographie

Spanish

Save record 3

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