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Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 DEF

Modifying the geometry of an image (which may be from either a remotely sensed or map data source) [that] usually involves rectification and/or registration.  3, fiche 1, Anglais, - resampling

Record number: 1, Textual support number: 1 CONT

Overview of resampling methods. From the perspective of space, a satellite camera or sensor takes images that provide unique Earth information at scales ranging from very small to very large. To better understand an image, its shape, scale and perspective often are changed by rectification, orthorectification or map projection to relate it to real world coordinates. During that process, however, gaps between pixels may form, requiring that images be resampled to fill in those missing pixels. There are basically 3 methods of resampling : nearest neighbor, bilinear interpolation and cubic convolution.  4, fiche 1, Anglais, - resampling

Record number: 1, Textual support number: 1 OBS

resampling: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  5, fiche 1, Anglais, - resampling

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 CONT

Une fois déterminé le modèle mathématique permettant de passer d'un système de coordonnées à un autre, il faut encore calculer la valeur des pixels dans l'image redressée : c'est l'étape de rééchantillonnage. On a généralement le choix entre trois méthodes : [la] méthode du plus proche voisin (valeur de 1 pixel) [;] l'interpolation bilinéaire (valeur pondérée de 4 pixels) [;] la convolution cubique (valeur pondérée de 16 pixels).  3, fiche 1, Français, - r%C3%A9%C3%A9chantillonnage

Record number: 1, Textual support number: 1 OBS

rééchantillonnage : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  4, fiche 1, Français, - r%C3%A9%C3%A9chantillonnage

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 DEF

A resampling method that uses the data file values of four pixels in a 2 by 2 window to calculate an output data file value by computing a weighted average of the input data file values with a bilinear function.  2, fiche 2, Anglais, - bilinear%20interpolation%20resampling

Record number: 2, Textual support number: 1 OBS

Depending upon the relation between the DEM [Digital Elevation Model] and radar resolutions, the interpolation method used to resample from map to radar image geometry can become important. Bilinear interpolation uses the appropriate weighting to distribute the contribution of the local illuminated area into four adjacent radar geometry pixels.  2, fiche 2, Anglais, - bilinear%20interpolation%20resampling

Record number: 2, Textual support number: 2 OBS

resampling: Modifying the geometry of an image (which may be from either a remotely sensed or map data source) [that] usually involves rectification and/or registration.  3, fiche 2, Anglais, - bilinear%20interpolation%20resampling

Record number: 2, Textual support number: 3 OBS

bilinear interpolation resampling : term officially approved by the RADARSAT-2 Terminology Approval Group(RTAG).  4, fiche 2, Anglais, - bilinear%20interpolation%20resampling

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 OBS

L'interpolation bilinéaire consiste à utiliser les 4 points les plus proches des coordonnées calculées dans l'image source en les pondérant par des coefficients inversement proportionnels à la distance et dont la somme vaut 1.  2, fiche 2, Français, - r%C3%A9%C3%A9chantillonnage%20par%20interpolation%20bilin%C3%A9aire

Record number: 2, Textual support number: 2 OBS

rééchantillonnage par interpolation bilinéaire : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  3, fiche 2, Français, - r%C3%A9%C3%A9chantillonnage%20par%20interpolation%20bilin%C3%A9aire

Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Anglais

Record number: 3, Textual support number: 1 CONT

Bilinear filtering is a method of anti-aliasing texture maps. A texture-aliening artifact occurs due to sampling on a finite pixel grid. Point-sampled telexes jump from one pixel to another at random times. This aliening is very noticeable on slowly rotating or moving polygons. The texture image jumps and shears along pixel boundaries. To eliminate this problem, bilinear filtering takes a weighted average of four adjacent texture pixels to create a single telex.  1, fiche 3, Anglais, - bilinear%20filtering

Fiche 3,  Justifications,  Français

Record number: 3, Textual support number: 1 CONT

filtrage bilinéaire : afin d'améliorer les effets visuels des placages de textures, le filtre bi-linéaire interpole de nouveaux pixels entre 2 pixels horizontaux et verticaux. Ainsi, les textures ne se dégradent pas trop quand on les regardent de près.  1, fiche 3, Français, - filtrage%20bilin%C3%A9aire

Fiche 3,  Justifications,  Espagnol

Fiche 4,  Justifications,  Anglais

Record number: 4, Textual support number: 1 CONT

The Wigner distribution and ambiguity function are two specific examples from a wide class of bilinear distributions.  1, fiche 4, Anglais, - bilinear%20distribution

Fiche 4,  Justifications,  Français

Fiche 4,  Justifications,  Espagnol