Keyphrases
- covariance matrix
- covariance matrices
- sample size
- eigenvalues and eigenvectors
- principal component analysis
- mahalanobis distance
- positive definite
- gaussian mixture
- geometrical interpretation
- correlation matrix
- pseudo inverse
- eigendecomposition
- objective function
- vector space
- estimation error
- superpixels
- machine learning
- search algorithm
- face recognition