Closed-form expressions of the eigen decomposition of 2 x 2 and 3 x 3 Hermitian matrices
hal.structure.identifier | Institut de Mathématiques de Bordeaux [IMB] | |
dc.contributor.author | DELEDALLE, Charles-Alban | |
hal.structure.identifier | Laboratoire Hubert Curien [LabHC] | |
dc.contributor.author | DENIS, Loic | |
hal.structure.identifier | Dipartimento di Ingegneria Elettrica e delle Tecnologie dell'Informazione [Napoli] [DIETI] | |
dc.contributor.author | TABTI, Sonia | |
hal.structure.identifier | Laboratoire Traitement et Communication de l'Information [LTCI] | |
dc.contributor.author | TUPIN, Florence | |
dc.date.accessioned | 2024-04-04T03:10:38Z | |
dc.date.available | 2024-04-04T03:10:38Z | |
dc.date.issued | 2017 | |
dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/193701 | |
dc.description.abstractEn | The eigen decomposition of covariance matrices is at the core of many data analysis techniques. The study of 2-components or 3-components vector fields typically requires computing numerous eigen decompositions of 2 x 2 or 3 x 3 matrices. This is, for example, the case in the analysis of interferometric or polarimetric SAR images, see MuLoG algorithm (https://hal.archives-ouvertes.fr/hal-01388858). The closed-form expression of eigen-values and eigenvectors then provides a way to derive faster data processing algorithms. This note gives these expressions in the general case (special cases where some coefficients are zero, or the eigenvalues are not separated may not be covered and then require either to introduce a small perturbation of the initial matrix or to derive other expressions). | |
dc.language.iso | en | |
dc.title.en | Closed-form expressions of the eigen decomposition of 2 x 2 and 3 x 3 Hermitian matrices | |
dc.type | Rapport | |
dc.subject.hal | Sciences de l'ingénieur [physics]/Traitement du signal et de l'image | |
bordeaux.hal.laboratories | Institut de Mathématiques de Bordeaux (IMB) - UMR 5251 | * |
bordeaux.institution | Université de Bordeaux | |
bordeaux.institution | Bordeaux INP | |
bordeaux.institution | CNRS | |
bordeaux.type.institution | Université de Lyon | |
bordeaux.type.report | rr | |
hal.identifier | hal-01501221 | |
hal.version | 1 | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-01501221v1 | |
bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2017&rft.au=DELEDALLE,%20Charles-Alban&DENIS,%20Loic&TABTI,%20Sonia&TUPIN,%20Florence&rft.genre=unknown |
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