TERMIUM Plus^®

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... the thermionic projection microscope [is] used for measuring the work functions of separate crystal planes. Electrons emitted from the planes are collected on a phosphor screen, and a video camera is used to produce a digitized image of the intensity pattern. Numerical calculations yield the work function associated with each plane.  2, fiche 1, Anglais, - thermionic%20projection%20microscope

Fiche 1,  Justifications,  Français

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Microscope à émission thermoionique à haute température.  1, fiche 1, Français, - microscope%20%C3%A0%20%C3%A9mission%20thermoionique

Fiche 1,  Justifications,  Espagnol

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[...] puede darse el caso de que la superficie en estudio tenga algún contaminante que opaque la emisión de electrones. Este efecto de emisión termoiónica ha sido usado para desarrollar el microscopio de emisión termoiónica, en el que el contraste es generado por la diferencia en función trabajo de un punto a otro de la muestra.  1, fiche 1, Espagnol, - microscopio%20de%20emisi%C3%B3n%20termoi%C3%B3nica

Fiche 2,  Justifications,  Anglais

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Automated numerical methods can include supervised and unsupervised classification and image segmentation algorithms... These methods provide alternatives for extracting geological information in a systematic and unbiased manner, although visual interpretation is commonly judged to outperform methods of automated pattern recognition.  2, fiche 2, Anglais, - automated%20numerical%20method

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Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Anglais

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A numerical number... assigned to each spatial grid position in the file representing the brightness levels of an image.  3, fiche 3, Anglais, - digital%20number

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Data generated are readily available in digital format, in the form of a raster or grid in which individual image elements, called pixels, contain a digital number (DN) that is proportional to the amount of solar energy reflected at a given wavelength.  2, fiche 3, Anglais, - digital%20number

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Fiche 4,  Justifications,  Anglais

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On an image, a group of lines or bands having equaldensities or numerical values.  2, fiche 4, Anglais, - isodensity

Fiche 4,  Justifications,  Français

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[Ensemble des] lignes ou des plages d'une image qui représentent des teintes ou des valeurs numériques égales.  2, fiche 4, Français, - isodensit%C3%A9

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Fiche 5,  Justifications,  Anglais

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Contrast enhancement. Improving the picture by turning up the contrast. Most digital image display systems allow one to break each ’primitive’ colour into 256 degrees of intensity. An image that uses this entire intensity scale, that is, that contains values coded from 0 to 255, has excellent contrast, for the colour range will extend from black to white and include fully-saturated colours. In contrast, an image that uses a narrow range of numerical values will lack contrast(it will look ’greyish’).  2, fiche 5, Anglais, - nonlinear%20contrast%20enhancement

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nonlinear contrast enhancement: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  3, fiche 5, Anglais, - nonlinear%20contrast%20enhancement

Fiche 5,  Justifications,  Français

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Le rehaussement non linéaire du contraste implique souvent l'égalisation de l'histogramme par un algorithme. La méthode d'étirement non linéaire du contraste a un inconvénient important [:] chaque valeur dans l'image d'entrée peut avoir plusieurs de valeurs dans l'image de sortie.  2, fiche 5, Français, - rehaussement%20non%20lin%C3%A9aire%20de%20contraste

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rehaussement non linéaire de contraste : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  1, fiche 5, Français, - rehaussement%20non%20lin%C3%A9aire%20de%20contraste

Fiche 5,  Justifications,  Espagnol

Fiche 6,  Justifications,  Anglais

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In analysis, the removal of certain spectral or spatial frequencies to highlight features in the remaining image.  2, fiche 6, Anglais, - filtering

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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.  3, fiche 6, Anglais, - filtering

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filtering: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  4, fiche 6, Anglais, - filtering

Fiche 6,  Justifications,  Français

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En analyse des données, élimination de certaines fréquences spectrales ou spatiales qui permettent d'accentuer des caractéristiques spécifiques d'images.  2, fiche 6, Français, - filtrage

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[...] 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.  3, fiche 6, Français, - filtrage

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filtrage : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  4, fiche 6, Français, - filtrage

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Filtrage adapté.  4, fiche 6, Français, - filtrage

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Fiche 7,  Justifications,  Anglais

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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.  1, fiche 7, Anglais, - two%2Ddimensional%20numerical%20convolution

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