Geometric Means in a Novel Vector Space Structure on Symmetric Positive-Definite Matrices.
Vincent ArsignyPierre FillardXavier PennecNicholas AyachePublished in: SIAM J. Matrix Anal. Appl. (2006)
Keyphrases
- symmetric positive definite matrices
- vector space
- dictionary learning
- valued data
- matrix valued
- riemannian manifolds
- log euclidean
- euclidean space
- sparse coding
- similarity search
- geometric structure
- sparse representation
- covariance matrices
- lie group
- distance measure
- riemannian metric
- dt mri
- feature vectors
- dw mri
- low dimensional
- image classification
- finite dimensional
- high dimensional
- feature extraction
- medical images