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MATRIX DECOMPOSITION [4 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 2006-05-08

English

Subject field(s)
  • Mathematical Geography
CONT

A covariance matrix is generated using the echo returns. The presence of at least one target within a single range cell is detected. A plurality of consecutive pulses are transmitted in a direction of the single range cell within a sufficiently short period so that at least one target remains within the single range cell while the plurality of consecutive pulses are transmitted. An echo signal is sampled from each of the plurality of pulses. An updated covariance matrix is estimated each time the echo signal is sampled. An eigenvalue decomposition is updated each time the covariance matrix is updated. The number of targets in the single range cell is estimated, based on the updated eigenvalue decomposition.

OBS

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

French

Domaine(s)
  • Géographie mathématique
CONT

La matrice de covariance permet d'obtenir une description des propriétés diffusantes de la cible.

OBS

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

Spanish

Save record 2

Record 3 2000-07-17

English

Subject field(s)
  • Chemistry
CONT

Copper can be released from sediment through ion exchange, matrix solubilization(in the case of iron and manganese hydroxides) or matrix decomposition(in the case of organic matter).

French

Domaine(s)
  • Chimie
CONT

La dissociation du cuivre des sédiments peut s'opérer par échange ionique, par solubilisation de la matrice (dans le cas des hydroxydes de fer ou de manganèse) ou par décomposition de la matrice (dans le cas de la matière organique).

Spanish

Save record 3

Record 4 2000-07-17

English

Subject field(s)
  • Chemistry
CONT

Copper can be released from sediment through ion exchange, matrix solubilization(in the case of iron and manganese hydroxides) or matrix decomposition(in the case of organic matter).

French

Domaine(s)
  • Chimie
CONT

La dissociation du cuivre des sédiments peut s'opérer par échange ionique, par solubilisation de la matrice (dans le cas des hydroxydes de fer ou de manganèse) ou par décomposition de la matrice (dans le cas de la matière organique).

Spanish

Save record 4

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