Covariance Matrix Estimation for the Cryo-EM Heterogeneity Problem.
Gene KatsevichAlexander KatsevichAmit SingerPublished in: SIAM J. Imaging Sci. (2015)
Keyphrases
- covariance matrix
- gaussian mixture
- covariance matrices
- estimation error
- geometrical interpretation
- sample size
- mahalanobis distance
- eigendecomposition
- principal component analysis
- maximum likelihood
- objective function
- density estimation
- correlation matrix
- pseudo inverse
- positive definite
- gaussian mixture model
- expectation maximization
- em algorithm
- probabilistic model
- eigenvalues and eigenvectors
- transformation matrix
- maximum likelihood estimation
- unsupervised learning
- generative model
- optimization methods
- multivariate gaussian
- symmetric matrix