TERMIUM Plus®

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IMAGE REGRESSION [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2005-05-04

English

Subject field(s)
  • Remote Sensing
DEF

Image processing where different images taken on a same date can be compared without applying complex atmospheric and radiometric corrections.

CONT

Image regression, where the pixel values of the second image are assumed to be a linear function of the corresponding pixel values of the first image. A least squares regression can be used to determine the linear function. Using this function the estimated pixel values for the second image can be computed. The image difference is determined between the estimated second image and the first image using either image differencing or image ratioing. If there is no change the pixel values of the unchanged areas will be close to the estimated pixel values, otherwise there will be changes.

OBS

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

French

Domaine(s)
  • Télédétection
DEF

Traitement qui permet de rendre comparables des images de dates différentes sans passer par des corrections atmosphériques et radiométriques complexes.

OBS

On construit une droite représentant les pixels dont la valeur n'a pas changé, et on regarde où se trouvent les autres pixels par rapport à cette droite (c'est la perpendiculaire à la droite qui indique les changements).

OBS

régression d'image : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

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