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DVS [2 records]

Record 1 2007-01-31

English

Subject field(s)
  • Remote Sensing
DEF

A technique used in image restoration, enhancement or coding [that is] a separable orthogonal transform or an expansion of the matrix in rank-1 matrices.

CONT

This paper presents a simple and effective method for matching two uncalibrated images. Corner points are firstly extracted as interest points in the two images. Each interest point is assigned one dominant orientation. The initial set of point matches is then obtained by singular value decomposition of a correspondence strength matrix. A new expression of this matrix is introduced to handle more complicated imaging conditions. Each element of this matrix is the similarity measure between two interest points. The new similarity measure is invariant to image rotation by taking into account the dominant orientation of the two interest points. The epipolar geometry constraint is finally imposed to reject the false matches. Experimental results on real images show this approach to be effective for general image matching.

OBS

single value decomposition; SVD: term and abbreviation officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

French

Domaine(s)
  • Télédétection
DEF

Technique puissante d’analyse et de traitement matriciel qui exhibe les propriétés géométriques de la matrice.

OBS

décomposition en valeurs singulières; DVS : terme et abréviation uniformisés par le Groupe de travail de la terminologie de RADARSAT-2(GTTR).

Spanish

Campo(s) temático(s)
  • Teledetección
CONT

Por este motivo, se ha desarrollado un modelo estadístico de predicción, que tiene como núcleo la descomposición en valores singulares de una matriz. Esta técnica produce pares de patrones que explican la máxima covarianza entre dos campos.

Save record 1

Record 2 2002-03-18

English

Subject field(s)
  • Meteorological Forecasting, Data Measurement and Analysis
CONT

The use of an SST [sea surface temperature] analysis in numerical weather prediction (NWP) imposes requirements which differ in some ways from other applications such as climate studies or dynamic extended range forecasting.

OBS

extended forecast: Forecast for a period generally extending beyond the normal range of the operational forecast.

Key term(s)
  • dynamic extended range forecast
  • dynamical extended-range forecast
  • dynamical extended range forecast
  • dynamical extended-range forecasting

French

Domaine(s)
  • Prévisions météorologiques et mesure et analyse des données
CONT

Les analyses d’une fonction orthogonale empirique(FOE) et de la décomposition en valeur singulière(DVS) sont appliquées à l'ensemble de données de la prévision dynamique à moyenne échéance 90(PDME90) dans le but de trouver les configurations et les régions les plus prévisibles, pour des champs de hauteur géopotentielle à 500mb sur l'hémisphère Nord non hivernal.

OBS

prévision à échéance prolongée; prévision étendue : Prévision pour une période qui s’étend généralement au-delà de l’échéance opérationnelle normale.

Spanish

Campo(s) temático(s)
  • Previsiones meteorológicas, medición y análisis de datos
Save record 2

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