Bi-level algorithm for optimizing hyperparameters in penalized nonnegative matrix factorization.
Nicoletta Del BuonoFlavia EspositoLaura SelicatoRafal ZdunekPublished in: Appl. Math. Comput. (2023)
Keyphrases
- bi level
- nonnegative matrix factorization
- hyperparameters
- negative matrix factorization
- k means
- worst case
- objective function
- closed form
- gray scale
- em algorithm
- expectation maximization
- support vector
- learning algorithm
- model selection
- clustering method
- maximum a posteriori
- prior information
- bayesian framework
- input image
- multiresolution